/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:11:35,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:11:35,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:11:35,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:11:35,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:11:35,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:11:35,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:11:35,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:11:35,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:11:35,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:11:35,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:11:35,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:11:35,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:11:35,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:11:35,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:11:35,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:11:35,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:11:35,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:11:35,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:11:35,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:11:35,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:11:35,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:11:35,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:11:35,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:11:35,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:11:35,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:11:35,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:11:35,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:11:35,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:11:35,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:11:35,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:11:35,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:11:35,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:11:35,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:11:35,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:11:35,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:11:35,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:11:35,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:11:35,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:11:35,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:11:35,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:11:35,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:11:35,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:11:35,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:11:35,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:11:35,898 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:11:35,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:11:35,898 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:11:35,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:11:35,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:11:35,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:11:35,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:11:35,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:11:35,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:11:35,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:11:35,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:11:35,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:11:35,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:11:35,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:11:35,902 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:11:35,902 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:11:36,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:11:36,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:11:36,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:11:36,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:11:36,156 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:11:36,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-04-01 20:11:37,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:11:37,635 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:11:37,636 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-04-01 20:11:37,648 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf67d512/e4c95396145a45c6b0336ba11740ab15/FLAG0b4323bef [2023-04-01 20:11:37,660 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf67d512/e4c95396145a45c6b0336ba11740ab15 [2023-04-01 20:11:37,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:11:37,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:11:37,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:11:37,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:11:37,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:11:37,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a897597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37, skipping insertion in model container [2023-04-01 20:11:37,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:11:37,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:11:37,799 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-04-01 20:11:37,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:11:37,852 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:11:37,861 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-04-01 20:11:37,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:11:37,903 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:11:37,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37 WrapperNode [2023-04-01 20:11:37,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:11:37,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:11:37,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:11:37,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:11:37,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:11:37,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:11:37,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:11:37,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:11:37,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (1/1) ... [2023-04-01 20:11:37,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:11:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:37,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:11:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:11:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:11:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:11:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-01 20:11:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-01 20:11:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-01 20:11:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:11:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:11:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:11:38,122 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:11:38,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:11:38,536 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:11:38,546 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:11:38,547 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 20:11:38,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:11:38 BoogieIcfgContainer [2023-04-01 20:11:38,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:11:38,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:11:38,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:11:38,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:11:38,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:11:37" (1/3) ... [2023-04-01 20:11:38,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160e3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:11:38, skipping insertion in model container [2023-04-01 20:11:38,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:37" (2/3) ... [2023-04-01 20:11:38,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160e3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:11:38, skipping insertion in model container [2023-04-01 20:11:38,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:11:38" (3/3) ... [2023-04-01 20:11:38,561 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-04-01 20:11:38,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:11:38,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:11:38,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:11:38,648 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=LoopsAndPotentialCycles, 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;@64ab1c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:11:38,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:11:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 89 states have (on average 1.6067415730337078) internal successors, (143), 92 states have internal predecessors, (143), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 20:11:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 20:11:38,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:38,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:38,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:38,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2146167660, now seen corresponding path program 1 times [2023-04-01 20:11:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:38,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826809864] [2023-04-01 20:11:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:38,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826809864] [2023-04-01 20:11:39,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826809864] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:39,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194779921] [2023-04-01 20:11:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:39,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:39,342 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) [2023-04-01 20:11:39,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:11:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 20:11:39,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:39,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194779921] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:39,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 19 [2023-04-01 20:11:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876682993] [2023-04-01 20:11:39,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:39,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:11:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:11:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:11:39,850 INFO L87 Difference]: Start difference. First operand has 110 states, 89 states have (on average 1.6067415730337078) internal successors, (143), 92 states have internal predecessors, (143), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:11:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:41,454 INFO L93 Difference]: Finished difference Result 264 states and 431 transitions. [2023-04-01 20:11:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 20:11:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2023-04-01 20:11:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:41,464 INFO L225 Difference]: With dead ends: 264 [2023-04-01 20:11:41,464 INFO L226 Difference]: Without dead ends: 166 [2023-04-01 20:11:41,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 20:11:41,473 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 344 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:41,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 94 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:11:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-01 20:11:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2023-04-01 20:11:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.471698113207547) internal successors, (156), 109 states have internal predecessors, (156), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2023-04-01 20:11:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 192 transitions. [2023-04-01 20:11:41,521 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 192 transitions. Word has length 41 [2023-04-01 20:11:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:41,521 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 192 transitions. [2023-04-01 20:11:41,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:11:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 192 transitions. [2023-04-01 20:11:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 20:11:41,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:41,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:41,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:11:41,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 20:11:41,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:41,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1799391333, now seen corresponding path program 1 times [2023-04-01 20:11:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:41,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123354466] [2023-04-01 20:11:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:41,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:41,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:41,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123354466] [2023-04-01 20:11:41,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123354466] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:41,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771697941] [2023-04-01 20:11:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:41,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:41,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:41,925 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) [2023-04-01 20:11:41,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:11:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 20:11:42,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:42,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771697941] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:42,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:42,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 22 [2023-04-01 20:11:42,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158124783] [2023-04-01 20:11:42,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 20:11:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 20:11:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:11:42,435 INFO L87 Difference]: Start difference. First operand 130 states and 192 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:11:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:44,328 INFO L93 Difference]: Finished difference Result 307 states and 470 transitions. [2023-04-01 20:11:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 20:11:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-04-01 20:11:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:44,331 INFO L225 Difference]: With dead ends: 307 [2023-04-01 20:11:44,331 INFO L226 Difference]: Without dead ends: 223 [2023-04-01 20:11:44,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 20:11:44,333 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 369 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:44,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 87 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3043 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:11:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-01 20:11:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 158. [2023-04-01 20:11:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 129 states have (on average 1.4186046511627908) internal successors, (183), 133 states have internal predecessors, (183), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (30), 20 states have call predecessors, (30), 18 states have call successors, (30) [2023-04-01 20:11:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 233 transitions. [2023-04-01 20:11:44,374 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 233 transitions. Word has length 45 [2023-04-01 20:11:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:44,374 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 233 transitions. [2023-04-01 20:11:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:11:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 233 transitions. [2023-04-01 20:11:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 20:11:44,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:44,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:44,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:44,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 20:11:44,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:44,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -39687109, now seen corresponding path program 1 times [2023-04-01 20:11:44,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:44,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331646987] [2023-04-01 20:11:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331646987] [2023-04-01 20:11:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331646987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:44,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:44,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 20:11:44,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930485701] [2023-04-01 20:11:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:11:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:11:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:11:44,787 INFO L87 Difference]: Start difference. First operand 158 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:45,310 INFO L93 Difference]: Finished difference Result 341 states and 507 transitions. [2023-04-01 20:11:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:11:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-04-01 20:11:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:45,313 INFO L225 Difference]: With dead ends: 341 [2023-04-01 20:11:45,313 INFO L226 Difference]: Without dead ends: 245 [2023-04-01 20:11:45,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:11:45,315 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 37 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:11:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-04-01 20:11:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2023-04-01 20:11:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.373134328358209) internal successors, (276), 205 states have internal predecessors, (276), 29 states have call successors, (29), 9 states have call predecessors, (29), 10 states have return successors, (39), 32 states have call predecessors, (39), 27 states have call successors, (39) [2023-04-01 20:11:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 344 transitions. [2023-04-01 20:11:45,352 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 344 transitions. Word has length 49 [2023-04-01 20:11:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:45,352 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 344 transitions. [2023-04-01 20:11:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 344 transitions. [2023-04-01 20:11:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 20:11:45,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:45,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:45,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:11:45,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:45,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 461876736, now seen corresponding path program 1 times [2023-04-01 20:11:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:45,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962178218] [2023-04-01 20:11:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:45,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962178218] [2023-04-01 20:11:45,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962178218] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:45,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:45,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412299275] [2023-04-01 20:11:45,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:45,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:45,454 INFO L87 Difference]: Start difference. First operand 241 states and 344 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:45,760 INFO L93 Difference]: Finished difference Result 293 states and 422 transitions. [2023-04-01 20:11:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-04-01 20:11:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:45,763 INFO L225 Difference]: With dead ends: 293 [2023-04-01 20:11:45,763 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 20:11:45,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:11:45,764 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 172 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:45,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 17 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:11:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 20:11:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 221. [2023-04-01 20:11:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 185 states have (on average 1.345945945945946) internal successors, (249), 187 states have internal predecessors, (249), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (35), 28 states have call predecessors, (35), 23 states have call successors, (35) [2023-04-01 20:11:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 309 transitions. [2023-04-01 20:11:45,791 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 309 transitions. Word has length 50 [2023-04-01 20:11:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:45,797 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 309 transitions. [2023-04-01 20:11:45,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 309 transitions. [2023-04-01 20:11:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:11:45,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:45,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:45,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:11:45,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:45,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1342915104, now seen corresponding path program 1 times [2023-04-01 20:11:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:45,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768424321] [2023-04-01 20:11:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:45,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768424321] [2023-04-01 20:11:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768424321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:45,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782031799] [2023-04-01 20:11:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:45,867 INFO L87 Difference]: Start difference. First operand 221 states and 309 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:46,122 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2023-04-01 20:11:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:11:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2023-04-01 20:11:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:46,124 INFO L225 Difference]: With dead ends: 238 [2023-04-01 20:11:46,124 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 20:11:46,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:11:46,125 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:46,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 17 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 20:11:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2023-04-01 20:11:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 189 states have (on average 1.3386243386243386) internal successors, (253), 191 states have internal predecessors, (253), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (35), 28 states have call predecessors, (35), 23 states have call successors, (35) [2023-04-01 20:11:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2023-04-01 20:11:46,144 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 51 [2023-04-01 20:11:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:46,144 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2023-04-01 20:11:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2023-04-01 20:11:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:11:46,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:46,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:46,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 20:11:46,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:46,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 432092258, now seen corresponding path program 1 times [2023-04-01 20:11:46,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:46,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499591867] [2023-04-01 20:11:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:46,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499591867] [2023-04-01 20:11:46,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499591867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:46,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:46,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:11:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487026134] [2023-04-01 20:11:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:46,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 20:11:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 20:11:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:11:46,214 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:46,513 INFO L93 Difference]: Finished difference Result 232 states and 319 transitions. [2023-04-01 20:11:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2023-04-01 20:11:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:46,515 INFO L225 Difference]: With dead ends: 232 [2023-04-01 20:11:46,515 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 20:11:46,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:11:46,516 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:46,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 22 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:11:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 20:11:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2023-04-01 20:11:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 185 states have (on average 1.3297297297297297) internal successors, (246), 187 states have internal predecessors, (246), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (35), 28 states have call predecessors, (35), 23 states have call successors, (35) [2023-04-01 20:11:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 306 transitions. [2023-04-01 20:11:46,536 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 306 transitions. Word has length 51 [2023-04-01 20:11:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:46,536 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 306 transitions. [2023-04-01 20:11:46,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 306 transitions. [2023-04-01 20:11:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 20:11:46,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:46,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 20:11:46,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:46,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1028987085, now seen corresponding path program 1 times [2023-04-01 20:11:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:46,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605554653] [2023-04-01 20:11:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:11:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:46,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605554653] [2023-04-01 20:11:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605554653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:46,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:46,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116235073] [2023-04-01 20:11:46,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:46,617 INFO L87 Difference]: Start difference. First operand 221 states and 306 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:46,900 INFO L93 Difference]: Finished difference Result 311 states and 437 transitions. [2023-04-01 20:11:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-04-01 20:11:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:46,902 INFO L225 Difference]: With dead ends: 311 [2023-04-01 20:11:46,902 INFO L226 Difference]: Without dead ends: 247 [2023-04-01 20:11:46,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:11:46,903 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 187 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:46,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 17 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-04-01 20:11:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2023-04-01 20:11:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 181 states have (on average 1.3093922651933703) internal successors, (237), 181 states have internal predecessors, (237), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (33), 26 states have call predecessors, (33), 21 states have call successors, (33) [2023-04-01 20:11:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 293 transitions. [2023-04-01 20:11:46,921 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 293 transitions. Word has length 52 [2023-04-01 20:11:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:46,922 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 293 transitions. [2023-04-01 20:11:46,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 293 transitions. [2023-04-01 20:11:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 20:11:46,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:46,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 20:11:46,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:46,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1057821204, now seen corresponding path program 2 times [2023-04-01 20:11:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:46,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377346636] [2023-04-01 20:11:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377346636] [2023-04-01 20:11:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377346636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135670610] [2023-04-01 20:11:47,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:11:47,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:47,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:47,085 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) [2023-04-01 20:11:47,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:11:47,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-01 20:11:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:11:47,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 20:11:47,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:47,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:47,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135670610] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:47,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:47,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2023-04-01 20:11:47,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894043637] [2023-04-01 20:11:47,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:47,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:47,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:11:47,309 INFO L87 Difference]: Start difference. First operand 215 states and 293 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:47,556 INFO L93 Difference]: Finished difference Result 427 states and 607 transitions. [2023-04-01 20:11:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-04-01 20:11:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:47,559 INFO L225 Difference]: With dead ends: 427 [2023-04-01 20:11:47,559 INFO L226 Difference]: Without dead ends: 348 [2023-04-01 20:11:47,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:11:47,560 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 162 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:47,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1479 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-01 20:11:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 322. [2023-04-01 20:11:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 274 states have (on average 1.3248175182481752) internal successors, (363), 273 states have internal predecessors, (363), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2023-04-01 20:11:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 443 transitions. [2023-04-01 20:11:47,583 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 443 transitions. Word has length 53 [2023-04-01 20:11:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:47,583 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 443 transitions. [2023-04-01 20:11:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 443 transitions. [2023-04-01 20:11:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 20:11:47,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:47,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:47,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:47,791 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:47,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1450848214, now seen corresponding path program 1 times [2023-04-01 20:11:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590485724] [2023-04-01 20:11:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590485724] [2023-04-01 20:11:48,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590485724] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721304510] [2023-04-01 20:11:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:48,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:11:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 20:11:48,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:48,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721304510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:48,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:48,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 18 [2023-04-01 20:11:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746346887] [2023-04-01 20:11:48,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:11:48,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:11:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:11:48,509 INFO L87 Difference]: Start difference. First operand 322 states and 443 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:11:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:48,925 INFO L93 Difference]: Finished difference Result 426 states and 586 transitions. [2023-04-01 20:11:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:11:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-01 20:11:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:48,927 INFO L225 Difference]: With dead ends: 426 [2023-04-01 20:11:48,928 INFO L226 Difference]: Without dead ends: 370 [2023-04-01 20:11:48,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-04-01 20:11:48,929 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 189 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:48,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 2121 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:11:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-04-01 20:11:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 353. [2023-04-01 20:11:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 300 states have (on average 1.33) internal successors, (399), 299 states have internal predecessors, (399), 38 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (48), 44 states have call predecessors, (48), 36 states have call successors, (48) [2023-04-01 20:11:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 485 transitions. [2023-04-01 20:11:48,950 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 485 transitions. Word has length 53 [2023-04-01 20:11:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:48,950 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 485 transitions. [2023-04-01 20:11:48,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:11:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 485 transitions. [2023-04-01 20:11:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 20:11:48,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:48,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:48,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:49,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:49,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:49,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:49,158 INFO L85 PathProgramCache]: Analyzing trace with hash 41895627, now seen corresponding path program 1 times [2023-04-01 20:11:49,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:49,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382542461] [2023-04-01 20:11:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382542461] [2023-04-01 20:11:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382542461] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982748258] [2023-04-01 20:11:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:49,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:49,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:11:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:11:49,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:49,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982748258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:49,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 14 [2023-04-01 20:11:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790173039] [2023-04-01 20:11:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:11:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:11:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:11:49,517 INFO L87 Difference]: Start difference. First operand 353 states and 485 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:49,673 INFO L93 Difference]: Finished difference Result 559 states and 797 transitions. [2023-04-01 20:11:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:11:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-04-01 20:11:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:49,676 INFO L225 Difference]: With dead ends: 559 [2023-04-01 20:11:49,676 INFO L226 Difference]: Without dead ends: 501 [2023-04-01 20:11:49,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-04-01 20:11:49,677 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 58 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 716 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:11:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-04-01 20:11:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 414. [2023-04-01 20:11:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 350 states have (on average 1.322857142857143) internal successors, (463), 350 states have internal predecessors, (463), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (64), 56 states have call predecessors, (64), 43 states have call successors, (64) [2023-04-01 20:11:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 572 transitions. [2023-04-01 20:11:49,705 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 572 transitions. Word has length 55 [2023-04-01 20:11:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:49,705 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 572 transitions. [2023-04-01 20:11:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 572 transitions. [2023-04-01 20:11:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 20:11:49,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:49,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:49,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 20:11:49,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:49,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 742960205, now seen corresponding path program 1 times [2023-04-01 20:11:49,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:49,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578197369] [2023-04-01 20:11:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:49,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:49,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578197369] [2023-04-01 20:11:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578197369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:49,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:49,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913318638] [2023-04-01 20:11:49,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:49,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:49,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:49,962 INFO L87 Difference]: Start difference. First operand 414 states and 572 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:50,214 INFO L93 Difference]: Finished difference Result 431 states and 591 transitions. [2023-04-01 20:11:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:11:50,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-04-01 20:11:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:50,216 INFO L225 Difference]: With dead ends: 431 [2023-04-01 20:11:50,216 INFO L226 Difference]: Without dead ends: 349 [2023-04-01 20:11:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:11:50,217 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:50,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 17 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-04-01 20:11:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2023-04-01 20:11:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 289 states have (on average 1.3356401384083045) internal successors, (386), 293 states have internal predecessors, (386), 42 states have call successors, (42), 11 states have call predecessors, (42), 15 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2023-04-01 20:11:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 477 transitions. [2023-04-01 20:11:50,237 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 477 transitions. Word has length 55 [2023-04-01 20:11:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:50,237 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 477 transitions. [2023-04-01 20:11:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 477 transitions. [2023-04-01 20:11:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 20:11:50,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:50,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 20:11:50,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:50,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2112816089, now seen corresponding path program 1 times [2023-04-01 20:11:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:50,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200616117] [2023-04-01 20:11:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:50,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200616117] [2023-04-01 20:11:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200616117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:50,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:50,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:11:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143310180] [2023-04-01 20:11:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:11:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:11:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:11:50,283 INFO L87 Difference]: Start difference. First operand 347 states and 477 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:50,507 INFO L93 Difference]: Finished difference Result 628 states and 867 transitions. [2023-04-01 20:11:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:11:50,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2023-04-01 20:11:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:50,509 INFO L225 Difference]: With dead ends: 628 [2023-04-01 20:11:50,509 INFO L226 Difference]: Without dead ends: 360 [2023-04-01 20:11:50,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:50,511 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:50,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 12 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-04-01 20:11:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 350. [2023-04-01 20:11:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 292 states have (on average 1.3356164383561644) internal successors, (390), 296 states have internal predecessors, (390), 42 states have call successors, (42), 11 states have call predecessors, (42), 15 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2023-04-01 20:11:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 481 transitions. [2023-04-01 20:11:50,533 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 481 transitions. Word has length 56 [2023-04-01 20:11:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:50,533 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 481 transitions. [2023-04-01 20:11:50,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 481 transitions. [2023-04-01 20:11:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:50,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:50,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:50,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 20:11:50,538 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:50,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1526729990, now seen corresponding path program 1 times [2023-04-01 20:11:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249549641] [2023-04-01 20:11:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:11:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:50,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:50,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249549641] [2023-04-01 20:11:50,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249549641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:50,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:50,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:11:50,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41212222] [2023-04-01 20:11:50,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:50,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:50,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:50,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:11:50,770 INFO L87 Difference]: Start difference. First operand 350 states and 481 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:51,583 INFO L93 Difference]: Finished difference Result 508 states and 723 transitions. [2023-04-01 20:11:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2023-04-01 20:11:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:51,586 INFO L225 Difference]: With dead ends: 508 [2023-04-01 20:11:51,586 INFO L226 Difference]: Without dead ends: 477 [2023-04-01 20:11:51,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:11:51,587 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:51,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:11:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-01 20:11:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 428. [2023-04-01 20:11:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 358 states have (on average 1.3491620111731844) internal successors, (483), 361 states have internal predecessors, (483), 52 states have call successors, (52), 11 states have call predecessors, (52), 17 states have return successors, (65), 61 states have call predecessors, (65), 49 states have call successors, (65) [2023-04-01 20:11:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 600 transitions. [2023-04-01 20:11:51,617 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 600 transitions. Word has length 57 [2023-04-01 20:11:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 600 transitions. [2023-04-01 20:11:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 600 transitions. [2023-04-01 20:11:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:51,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:51,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 20:11:51,619 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:51,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1477256673, now seen corresponding path program 1 times [2023-04-01 20:11:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:51,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596706471] [2023-04-01 20:11:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:51,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596706471] [2023-04-01 20:11:51,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596706471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:51,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:51,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:11:51,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17924343] [2023-04-01 20:11:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:11:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:11:51,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:11:51,671 INFO L87 Difference]: Start difference. First operand 428 states and 600 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:51,898 INFO L93 Difference]: Finished difference Result 780 states and 1098 transitions. [2023-04-01 20:11:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:11:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-04-01 20:11:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:51,901 INFO L225 Difference]: With dead ends: 780 [2023-04-01 20:11:51,901 INFO L226 Difference]: Without dead ends: 431 [2023-04-01 20:11:51,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:51,903 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:51,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 12 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-04-01 20:11:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 430. [2023-04-01 20:11:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 360 states have (on average 1.3472222222222223) internal successors, (485), 363 states have internal predecessors, (485), 52 states have call successors, (52), 11 states have call predecessors, (52), 17 states have return successors, (65), 61 states have call predecessors, (65), 49 states have call successors, (65) [2023-04-01 20:11:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 602 transitions. [2023-04-01 20:11:51,933 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 602 transitions. Word has length 57 [2023-04-01 20:11:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:51,933 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 602 transitions. [2023-04-01 20:11:51,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 602 transitions. [2023-04-01 20:11:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:51,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:51,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:51,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 20:11:51,935 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:51,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1539296287, now seen corresponding path program 1 times [2023-04-01 20:11:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566375484] [2023-04-01 20:11:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566375484] [2023-04-01 20:11:52,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566375484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:52,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135880504] [2023-04-01 20:11:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:52,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:52,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:11:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:52,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:11:52,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:52,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135880504] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:52,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-04-01 20:11:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349910654] [2023-04-01 20:11:52,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:52,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:11:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:11:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:11:52,323 INFO L87 Difference]: Start difference. First operand 430 states and 602 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:11:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:53,336 INFO L93 Difference]: Finished difference Result 548 states and 765 transitions. [2023-04-01 20:11:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:11:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-04-01 20:11:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:53,339 INFO L225 Difference]: With dead ends: 548 [2023-04-01 20:11:53,339 INFO L226 Difference]: Without dead ends: 475 [2023-04-01 20:11:53,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:11:53,341 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 275 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:53,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 52 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:11:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-04-01 20:11:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 446. [2023-04-01 20:11:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 373 states have (on average 1.351206434316354) internal successors, (504), 378 states have internal predecessors, (504), 53 states have call successors, (53), 12 states have call predecessors, (53), 19 states have return successors, (64), 61 states have call predecessors, (64), 50 states have call successors, (64) [2023-04-01 20:11:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 621 transitions. [2023-04-01 20:11:53,370 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 621 transitions. Word has length 57 [2023-04-01 20:11:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:53,370 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 621 transitions. [2023-04-01 20:11:53,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:11:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 621 transitions. [2023-04-01 20:11:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:53,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:53,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:53,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:11:53,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:53,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1146269277, now seen corresponding path program 1 times [2023-04-01 20:11:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:53,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597818531] [2023-04-01 20:11:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597818531] [2023-04-01 20:11:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597818531] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365168413] [2023-04-01 20:11:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:54,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:54,233 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:54,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:11:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:54,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 20:11:54,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:54,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365168413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:54,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:54,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 32 [2023-04-01 20:11:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250075459] [2023-04-01 20:11:54,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 20:11:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 20:11:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2023-04-01 20:11:54,706 INFO L87 Difference]: Start difference. First operand 446 states and 621 transitions. Second operand has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:11:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:58,838 INFO L93 Difference]: Finished difference Result 738 states and 1036 transitions. [2023-04-01 20:11:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 20:11:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2023-04-01 20:11:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:58,842 INFO L225 Difference]: With dead ends: 738 [2023-04-01 20:11:58,842 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 20:11:58,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 20:11:58,845 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 521 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 7759 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 7832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 7759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:58,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 137 Invalid, 7832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 7759 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 20:11:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 20:11:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 497. [2023-04-01 20:11:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 415 states have (on average 1.3397590361445784) internal successors, (556), 423 states have internal predecessors, (556), 58 states have call successors, (58), 14 states have call predecessors, (58), 23 states have return successors, (74), 65 states have call predecessors, (74), 55 states have call successors, (74) [2023-04-01 20:11:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 688 transitions. [2023-04-01 20:11:58,885 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 688 transitions. Word has length 57 [2023-04-01 20:11:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:58,885 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 688 transitions. [2023-04-01 20:11:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:11:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 688 transitions. [2023-04-01 20:11:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:58,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:58,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:58,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 20:11:59,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:59,109 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:59,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1704860567, now seen corresponding path program 2 times [2023-04-01 20:11:59,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:59,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976685504] [2023-04-01 20:11:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:59,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:59,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:59,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:11:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:59,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:59,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976685504] [2023-04-01 20:11:59,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976685504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:59,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:59,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:11:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223078541] [2023-04-01 20:11:59,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:59,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:59,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:11:59,303 INFO L87 Difference]: Start difference. First operand 497 states and 688 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:59,987 INFO L93 Difference]: Finished difference Result 621 states and 863 transitions. [2023-04-01 20:11:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-04-01 20:11:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:59,990 INFO L225 Difference]: With dead ends: 621 [2023-04-01 20:11:59,990 INFO L226 Difference]: Without dead ends: 514 [2023-04-01 20:11:59,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:11:59,991 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 299 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:59,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 42 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:11:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-01 20:12:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 497. [2023-04-01 20:12:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 415 states have (on average 1.3349397590361445) internal successors, (554), 423 states have internal predecessors, (554), 58 states have call successors, (58), 14 states have call predecessors, (58), 23 states have return successors, (74), 65 states have call predecessors, (74), 55 states have call successors, (74) [2023-04-01 20:12:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 686 transitions. [2023-04-01 20:12:00,027 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 686 transitions. Word has length 57 [2023-04-01 20:12:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:00,027 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 686 transitions. [2023-04-01 20:12:00,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 686 transitions. [2023-04-01 20:12:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 20:12:00,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:00,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:00,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 20:12:00,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:00,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -888212400, now seen corresponding path program 1 times [2023-04-01 20:12:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562430720] [2023-04-01 20:12:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:12:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562430720] [2023-04-01 20:12:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562430720] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:00,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776087543] [2023-04-01 20:12:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:00,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:00,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:00,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:12:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:00,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-01 20:12:00,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:03,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776087543] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:06,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:06,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 24] total 57 [2023-04-01 20:12:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247579182] [2023-04-01 20:12:06,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-01 20:12:06,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-01 20:12:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3003, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 20:12:06,183 INFO L87 Difference]: Start difference. First operand 497 states and 686 transitions. Second operand has 57 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 43 states have internal predecessors, (101), 13 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-04-01 20:12:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:16,323 INFO L93 Difference]: Finished difference Result 904 states and 1249 transitions. [2023-04-01 20:12:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 20:12:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 43 states have internal predecessors, (101), 13 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 58 [2023-04-01 20:12:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:16,327 INFO L225 Difference]: With dead ends: 904 [2023-04-01 20:12:16,327 INFO L226 Difference]: Without dead ends: 773 [2023-04-01 20:12:16,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=730, Invalid=9572, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 20:12:16,330 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1078 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7314 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 7314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:16,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 142 Invalid, 7494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 7314 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 20:12:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-04-01 20:12:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 543. [2023-04-01 20:12:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 453 states have (on average 1.3222958057395144) internal successors, (599), 462 states have internal predecessors, (599), 63 states have call successors, (63), 16 states have call predecessors, (63), 26 states have return successors, (82), 70 states have call predecessors, (82), 60 states have call successors, (82) [2023-04-01 20:12:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 744 transitions. [2023-04-01 20:12:16,382 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 744 transitions. Word has length 58 [2023-04-01 20:12:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:16,383 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 744 transitions. [2023-04-01 20:12:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 43 states have internal predecessors, (101), 13 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-04-01 20:12:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 744 transitions. [2023-04-01 20:12:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:12:16,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:16,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:16,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:16,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 20:12:16,590 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:16,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1135499970, now seen corresponding path program 1 times [2023-04-01 20:12:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:16,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655095527] [2023-04-01 20:12:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:16,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:12:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:12:16,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655095527] [2023-04-01 20:12:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655095527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:16,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:16,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:12:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835764515] [2023-04-01 20:12:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:12:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:12:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:12:16,635 INFO L87 Difference]: Start difference. First operand 543 states and 744 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:12:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:16,880 INFO L93 Difference]: Finished difference Result 552 states and 752 transitions. [2023-04-01 20:12:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:12:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2023-04-01 20:12:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:16,884 INFO L225 Difference]: With dead ends: 552 [2023-04-01 20:12:16,884 INFO L226 Difference]: Without dead ends: 514 [2023-04-01 20:12:16,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:12:16,885 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:16,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 17 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:12:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-01 20:12:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 500. [2023-04-01 20:12:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 415 states have (on average 1.3253012048192772) internal successors, (550), 425 states have internal predecessors, (550), 59 states have call successors, (59), 15 states have call predecessors, (59), 25 states have return successors, (77), 64 states have call predecessors, (77), 56 states have call successors, (77) [2023-04-01 20:12:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 686 transitions. [2023-04-01 20:12:16,945 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 686 transitions. Word has length 59 [2023-04-01 20:12:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:16,945 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 686 transitions. [2023-04-01 20:12:16,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:12:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 686 transitions. [2023-04-01 20:12:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:12:16,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:16,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:16,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 20:12:16,947 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:16,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 986798992, now seen corresponding path program 1 times [2023-04-01 20:12:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:16,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268792011] [2023-04-01 20:12:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:12:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:12:17,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268792011] [2023-04-01 20:12:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268792011] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459248363] [2023-04-01 20:12:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:17,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:12:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:12:17,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:12:17,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:12:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459248363] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:17,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:12:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 20:12:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738299339] [2023-04-01 20:12:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:12:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:12:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:12:17,149 INFO L87 Difference]: Start difference. First operand 500 states and 686 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:12:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:17,227 INFO L93 Difference]: Finished difference Result 865 states and 1202 transitions. [2023-04-01 20:12:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:12:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2023-04-01 20:12:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:17,230 INFO L225 Difference]: With dead ends: 865 [2023-04-01 20:12:17,230 INFO L226 Difference]: Without dead ends: 517 [2023-04-01 20:12:17,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:12:17,234 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 21 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:17,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 373 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:12:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-04-01 20:12:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 502. [2023-04-01 20:12:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 417 states have (on average 1.3237410071942446) internal successors, (552), 427 states have internal predecessors, (552), 59 states have call successors, (59), 15 states have call predecessors, (59), 25 states have return successors, (77), 64 states have call predecessors, (77), 56 states have call successors, (77) [2023-04-01 20:12:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 688 transitions. [2023-04-01 20:12:17,282 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 688 transitions. Word has length 59 [2023-04-01 20:12:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 688 transitions. [2023-04-01 20:12:17,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:12:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 688 transitions. [2023-04-01 20:12:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:12:17,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:17,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:17,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:17,490 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:17,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -42560306, now seen corresponding path program 1 times [2023-04-01 20:12:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:17,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605578688] [2023-04-01 20:12:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:12:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:18,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605578688] [2023-04-01 20:12:18,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605578688] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827361568] [2023-04-01 20:12:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:18,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:18,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:12:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:18,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 20:12:18,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:19,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827361568] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:20,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:20,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2023-04-01 20:12:20,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381586477] [2023-04-01 20:12:20,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:20,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-01 20:12:20,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-01 20:12:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 20:12:20,385 INFO L87 Difference]: Start difference. First operand 502 states and 688 transitions. Second operand has 58 states, 55 states have (on average 2.090909090909091) internal successors, (115), 46 states have internal predecessors, (115), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 20:12:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:26,593 INFO L93 Difference]: Finished difference Result 855 states and 1205 transitions. [2023-04-01 20:12:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 20:12:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 2.090909090909091) internal successors, (115), 46 states have internal predecessors, (115), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 59 [2023-04-01 20:12:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:26,600 INFO L225 Difference]: With dead ends: 855 [2023-04-01 20:12:26,600 INFO L226 Difference]: Without dead ends: 787 [2023-04-01 20:12:26,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=585, Invalid=8345, Unknown=0, NotChecked=0, Total=8930 [2023-04-01 20:12:26,603 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 968 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7718 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 7718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:26,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 147 Invalid, 7879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 7718 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-04-01 20:12:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-04-01 20:12:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 554. [2023-04-01 20:12:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 459 states have (on average 1.3202614379084967) internal successors, (606), 472 states have internal predecessors, (606), 65 states have call successors, (65), 17 states have call predecessors, (65), 29 states have return successors, (93), 69 states have call predecessors, (93), 62 states have call successors, (93) [2023-04-01 20:12:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 764 transitions. [2023-04-01 20:12:26,660 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 764 transitions. Word has length 59 [2023-04-01 20:12:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:26,661 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 764 transitions. [2023-04-01 20:12:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 2.090909090909091) internal successors, (115), 46 states have internal predecessors, (115), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 20:12:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 764 transitions. [2023-04-01 20:12:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:12:26,662 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:26,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:26,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:26,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-01 20:12:26,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:26,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1472084976, now seen corresponding path program 1 times [2023-04-01 20:12:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111930476] [2023-04-01 20:12:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111930476] [2023-04-01 20:12:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111930476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342333870] [2023-04-01 20:12:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:27,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:27,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:27,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:27,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:12:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:27,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 20:12:27,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:28,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:30,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342333870] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:30,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:30,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 51 [2023-04-01 20:12:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25212978] [2023-04-01 20:12:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:30,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 20:12:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 20:12:30,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 20:12:30,569 INFO L87 Difference]: Start difference. First operand 554 states and 764 transitions. Second operand has 51 states, 49 states have (on average 2.204081632653061) internal successors, (108), 40 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:12:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:46,873 INFO L93 Difference]: Finished difference Result 1018 states and 1423 transitions. [2023-04-01 20:12:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-04-01 20:12:46,875 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.204081632653061) internal successors, (108), 40 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 59 [2023-04-01 20:12:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:46,878 INFO L225 Difference]: With dead ends: 1018 [2023-04-01 20:12:46,878 INFO L226 Difference]: Without dead ends: 995 [2023-04-01 20:12:46,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=725, Invalid=9987, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 20:12:46,882 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1038 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 13222 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 13383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 13222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:46,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 187 Invalid, 13383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [161 Valid, 13222 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2023-04-01 20:12:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-04-01 20:12:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 678. [2023-04-01 20:12:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 563 states have (on average 1.3179396092362345) internal successors, (742), 580 states have internal predecessors, (742), 77 states have call successors, (77), 22 states have call predecessors, (77), 37 states have return successors, (113), 80 states have call predecessors, (113), 74 states have call successors, (113) [2023-04-01 20:12:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 932 transitions. [2023-04-01 20:12:46,976 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 932 transitions. Word has length 59 [2023-04-01 20:12:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:46,976 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 932 transitions. [2023-04-01 20:12:46,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.204081632653061) internal successors, (108), 40 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:12:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 932 transitions. [2023-04-01 20:12:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:12:46,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:46,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:46,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:47,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 20:12:47,187 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:47,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash -928636426, now seen corresponding path program 1 times [2023-04-01 20:12:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:47,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185156209] [2023-04-01 20:12:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:47,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:12:47,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 20:12:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:12:47,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-01 20:12:47,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 20:12:47,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:12:47,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 20:12:47,259 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:47,261 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 20:12:47,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 08:12:47 BoogieIcfgContainer [2023-04-01 20:12:47,307 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 20:12:47,307 INFO L158 Benchmark]: Toolchain (without parser) took 69643.33ms. Allocated memory was 255.9MB in the beginning and 369.1MB in the end (delta: 113.2MB). Free memory was 212.3MB in the beginning and 255.6MB in the end (delta: -43.4MB). Peak memory consumption was 71.5MB. Max. memory is 8.0GB. [2023-04-01 20:12:47,307 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 186.6MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 20:12:47,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.94ms. Allocated memory is still 255.9MB. Free memory was 211.9MB in the beginning and 198.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 20:12:47,307 INFO L158 Benchmark]: Boogie Preprocessor took 42.34ms. Allocated memory is still 255.9MB. Free memory was 198.3MB in the beginning and 196.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 20:12:47,308 INFO L158 Benchmark]: RCFGBuilder took 606.45ms. Allocated memory is still 255.9MB. Free memory was 196.2MB in the beginning and 169.3MB in the end (delta: 26.9MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2023-04-01 20:12:47,308 INFO L158 Benchmark]: TraceAbstraction took 68750.72ms. Allocated memory was 255.9MB in the beginning and 369.1MB in the end (delta: 113.2MB). Free memory was 168.5MB in the beginning and 255.6MB in the end (delta: -87.1MB). Peak memory consumption was 27.4MB. Max. memory is 8.0GB. [2023-04-01 20:12:47,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 186.6MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.94ms. Allocated memory is still 255.9MB. Free memory was 211.9MB in the beginning and 198.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.34ms. Allocated memory is still 255.9MB. Free memory was 198.3MB in the beginning and 196.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 606.45ms. Allocated memory is still 255.9MB. Free memory was 196.2MB in the beginning and 169.3MB in the end (delta: 26.9MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. * TraceAbstraction took 68750.72ms. Allocated memory was 255.9MB in the beginning and 369.1MB in the end (delta: 113.2MB). Free memory was 168.5MB in the beginning and 255.6MB in the end (delta: -87.1MB). Peak memory consumption was 27.4MB. 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 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=127, eb=-128, ma=33554432] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=-128, ma=33554432] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L59] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L64] COND TRUE e >= 127 [L65] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L80] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=33554432, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L76] EXPR m & ~ (1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m & ~ (1U << 24U)=-72057589726183424, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m | ((unsigned int )(e + 128) << 24U)=-72057589726183424, m=16777216] [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=16777216, e=-128, m=16777216, res=16777216] [L80] return (__retres4); VAL [\old(e)=-128, \old(m)=16777216, \result=-72057589726183424, __retres4=16777216, e=-128, m=16777216, res=16777216] [L253] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-72057589726183424, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=16777216] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L94] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma=16777215] [L110] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma | (1U << 24U)=-4261412865, ma=16777215] [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb=0] [L113] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb | (1U << 24U)=16777216, mb=0] [L113] mb = mb | (1U << 24U) [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 128 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 68.6s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 46.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7113 SdHoareTripleChecker+Valid, 32.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6949 mSDsluCounter, 5782 SdHoareTripleChecker+Invalid, 28.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5061 mSDsCounter, 827 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50717 IncrementalHoareTripleChecker+Invalid, 51544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 827 mSolverCounterUnsat, 721 mSDtfsCounter, 50717 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1629 GetRequests, 1031 SyntacticMatches, 13 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 19.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=678occurred in iteration=22, InterpolantAutomatonStates: 331, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 22 MinimizatonAttempts, 1342 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 1845 NumberOfCodeBlocks, 1827 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2122 ConstructedInterpolants, 2 QuantifiedInterpolants, 12523 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1880 ConjunctsInSsa, 308 ConjunctsInUnsatCore, 40 InterpolantComputations, 15 PerfectInterpolantSequences, 542/660 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: unable to determine feasibility of some traces [2023-04-01 20:12:47,541 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-04-01 20:12:47,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...