/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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:20:49,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:20:49,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:20:49,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:20:49,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:20:49,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:20:49,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:20:49,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:20:49,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:20:49,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:20:49,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:20:49,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:20:49,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:20:49,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:20:49,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:20:49,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:20:49,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:20:49,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:20:49,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:20:49,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:20:49,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:20:49,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:20:49,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:20:49,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:20:49,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:20:49,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:20:49,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:20:49,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:20:49,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:20:49,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:20:49,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:20:49,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:20:49,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:20:49,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:20:49,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:20:49,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:20:49,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:20:49,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:20:49,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:20:49,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:20:49,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:20:49,866 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 [2023-03-31 00:20:49,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:20:49,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:20:49,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:20:49,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:20:49,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:20:49,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:20:49,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:20:49,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:20:49,898 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:20:49,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:20:49,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:20:49,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:20:49,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:20:49,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:20:49,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:20:49,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:20:49,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:20:49,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:20:49,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:20:49,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:20:49,902 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:20:49,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:20:49,902 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:20:49,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:20:50,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:20:50,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:20:50,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:20:50,148 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:20:50,149 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:20:50,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.i [2023-03-31 00:20:51,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:20:51,278 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:20:51,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i [2023-03-31 00:20:51,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c5c8a5b/92769a29e0704ed8ba362868c765f06f/FLAG8c4d3c381 [2023-03-31 00:20:51,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c5c8a5b/92769a29e0704ed8ba362868c765f06f [2023-03-31 00:20:51,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:20:51,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:20:51,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:20:51,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:20:51,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:20:51,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f12a0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51, skipping insertion in model container [2023-03-31 00:20:51,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:20:51,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:20:51,450 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/loop-lit/gj2007.i[895,908] [2023-03-31 00:20:51,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:20:51,471 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:20:51,481 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/loop-lit/gj2007.i[895,908] [2023-03-31 00:20:51,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:20:51,493 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:20:51,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51 WrapperNode [2023-03-31 00:20:51,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:20:51,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:20:51,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:20:51,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:20:51,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:20:51,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:20:51,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:20:51,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:20:51,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (1/1) ... [2023-03-31 00:20:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:20:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:51,546 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) [2023-03-31 00:20:51,552 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 [2023-03-31 00:20:51,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:20:51,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:20:51,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:20:51,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:20:51,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:20:51,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:20:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:20:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:20:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:20:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:20:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:20:51,633 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:20:51,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:20:51,749 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:20:51,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:20:51,753 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 00:20:51,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:20:51 BoogieIcfgContainer [2023-03-31 00:20:51,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:20:51,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:20:51,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:20:51,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:20:51,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:20:51" (1/3) ... [2023-03-31 00:20:51,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a33a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:20:51, skipping insertion in model container [2023-03-31 00:20:51,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:51" (2/3) ... [2023-03-31 00:20:51,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a33a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:20:51, skipping insertion in model container [2023-03-31 00:20:51,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:20:51" (3/3) ... [2023-03-31 00:20:51,760 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.i [2023-03-31 00:20:51,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:20:51,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:20:51,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:20:51,846 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;@640379cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:20:51,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:20:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:20:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 00:20:51,855 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:51,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:51,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:51,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 1 times [2023-03-31 00:20:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:51,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416805258] [2023-03-31 00:20:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:52,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416805258] [2023-03-31 00:20:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416805258] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:20:52,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:20:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:20:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559408294] [2023-03-31 00:20:52,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:20:52,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:20:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:20:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:20:52,069 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:52,116 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-03-31 00:20:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:20:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 00:20:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:52,125 INFO L225 Difference]: With dead ends: 32 [2023-03-31 00:20:52,125 INFO L226 Difference]: Without dead ends: 13 [2023-03-31 00:20:52,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:20:52,129 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:52,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:20:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-03-31 00:20:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-03-31 00:20:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-03-31 00:20:52,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-03-31 00:20:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:52,152 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-03-31 00:20:52,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-03-31 00:20:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 00:20:52,153 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:52,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:20:52,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:52,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 1 times [2023-03-31 00:20:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188192123] [2023-03-31 00:20:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:52,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188192123] [2023-03-31 00:20:52,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188192123] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:20:52,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:20:52,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:20:52,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474366616] [2023-03-31 00:20:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:20:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:20:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:20:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:20:52,224 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:52,299 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-03-31 00:20:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:20:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 00:20:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:52,300 INFO L225 Difference]: With dead ends: 22 [2023-03-31 00:20:52,300 INFO L226 Difference]: Without dead ends: 15 [2023-03-31 00:20:52,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:20:52,302 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:52,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:20:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-03-31 00:20:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-03-31 00:20:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-03-31 00:20:52,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-03-31 00:20:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:52,307 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-03-31 00:20:52,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-03-31 00:20:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 00:20:52,307 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:52,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:20:52,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:52,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 85580979, now seen corresponding path program 1 times [2023-03-31 00:20:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367711892] [2023-03-31 00:20:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367711892] [2023-03-31 00:20:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367711892] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140266589] [2023-03-31 00:20:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:52,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:52,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:52,367 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) [2023-03-31 00:20:52,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:20:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:20:52,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:52,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140266589] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:52,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:52,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-31 00:20:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394667343] [2023-03-31 00:20:52,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:20:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:20:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:20:52,466 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:52,532 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2023-03-31 00:20:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:20:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 00:20:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:52,533 INFO L225 Difference]: With dead ends: 27 [2023-03-31 00:20:52,533 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 00:20:52,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:20:52,534 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:52,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:20:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 00:20:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 00:20:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-03-31 00:20:52,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2023-03-31 00:20:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:52,540 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-03-31 00:20:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-03-31 00:20:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 00:20:52,541 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:52,541 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:52,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:52,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:52,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:52,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash -942830074, now seen corresponding path program 1 times [2023-03-31 00:20:52,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:52,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207185103] [2023-03-31 00:20:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:52,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207185103] [2023-03-31 00:20:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207185103] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266133943] [2023-03-31 00:20:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:52,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:52,846 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) [2023-03-31 00:20:52,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:20:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:20:52,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:52,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:52,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266133943] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:52,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:52,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-03-31 00:20:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352813550] [2023-03-31 00:20:52,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:20:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:20:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:20:52,981 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:53,086 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-03-31 00:20:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:20:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-03-31 00:20:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:53,087 INFO L225 Difference]: With dead ends: 38 [2023-03-31 00:20:53,087 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 00:20:53,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:20:53,089 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:53,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 00:20:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 00:20:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-03-31 00:20:53,094 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2023-03-31 00:20:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:53,094 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-03-31 00:20:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-03-31 00:20:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 00:20:53,095 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:53,095 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:53,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:53,302 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,SelfDestructingSolverStorable3 [2023-03-31 00:20:53,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:53,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1651209990, now seen corresponding path program 2 times [2023-03-31 00:20:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:53,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502305704] [2023-03-31 00:20:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:53,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502305704] [2023-03-31 00:20:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502305704] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855575592] [2023-03-31 00:20:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:20:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:53,425 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) [2023-03-31 00:20:53,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:20:53,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:20:53,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:53,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 00:20:53,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:53,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855575592] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:53,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:53,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-03-31 00:20:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923331746] [2023-03-31 00:20:53,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:53,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 00:20:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 00:20:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2023-03-31 00:20:53,622 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:53,795 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2023-03-31 00:20:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 00:20:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-03-31 00:20:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:53,798 INFO L225 Difference]: With dead ends: 54 [2023-03-31 00:20:53,798 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 00:20:53,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2023-03-31 00:20:53,802 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:53,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:20:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 00:20:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-03-31 00:20:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-03-31 00:20:53,824 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2023-03-31 00:20:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:53,824 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-03-31 00:20:53,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-03-31 00:20:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 00:20:53,826 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:53,826 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:53,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:54,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:54,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:54,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1049238814, now seen corresponding path program 3 times [2023-03-31 00:20:54,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:54,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065437701] [2023-03-31 00:20:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:54,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:20:54,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065437701] [2023-03-31 00:20:54,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065437701] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389491093] [2023-03-31 00:20:54,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:20:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:54,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:54,283 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) [2023-03-31 00:20:54,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:20:54,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 00:20:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:54,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:20:54,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-03-31 00:20:54,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-03-31 00:20:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389491093] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:54,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:54,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2023-03-31 00:20:54,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66779738] [2023-03-31 00:20:54,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:54,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 00:20:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 00:20:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2023-03-31 00:20:54,472 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:54,757 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2023-03-31 00:20:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 00:20:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-03-31 00:20:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:54,759 INFO L225 Difference]: With dead ends: 64 [2023-03-31 00:20:54,759 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 00:20:54,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2023-03-31 00:20:54,760 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:54,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:20:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 00:20:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 00:20:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-03-31 00:20:54,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2023-03-31 00:20:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:54,767 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-03-31 00:20:54,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-03-31 00:20:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 00:20:54,768 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:54,768 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:54,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:54,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:54,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1735632235, now seen corresponding path program 4 times [2023-03-31 00:20:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120091288] [2023-03-31 00:20:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120091288] [2023-03-31 00:20:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120091288] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840599309] [2023-03-31 00:20:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:20:55,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:55,190 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) [2023-03-31 00:20:55,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:20:55,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:20:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:55,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:20:55,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:55,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:55,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840599309] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:55,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2023-03-31 00:20:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43233531] [2023-03-31 00:20:55,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:55,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-03-31 00:20:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-03-31 00:20:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 00:20:55,618 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:56,171 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2023-03-31 00:20:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 00:20:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-03-31 00:20:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:56,173 INFO L225 Difference]: With dead ends: 106 [2023-03-31 00:20:56,173 INFO L226 Difference]: Without dead ends: 88 [2023-03-31 00:20:56,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2023-03-31 00:20:56,175 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:56,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-03-31 00:20:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-03-31 00:20:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-03-31 00:20:56,184 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2023-03-31 00:20:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:56,184 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-03-31 00:20:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-03-31 00:20:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 00:20:56,185 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:56,185 INFO L195 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:56,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:56,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:56,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:56,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1520903576, now seen corresponding path program 5 times [2023-03-31 00:20:56,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:56,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738890863] [2023-03-31 00:20:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:56,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:57,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:57,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:57,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738890863] [2023-03-31 00:20:57,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738890863] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:57,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16361379] [2023-03-31 00:20:57,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:20:57,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:57,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:57,039 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) [2023-03-31 00:20:57,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:20:57,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2023-03-31 00:20:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:57,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2023-03-31 00:20:57,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:57,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:20:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16361379] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:57,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2023-03-31 00:20:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721849231] [2023-03-31 00:20:57,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-03-31 00:20:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-03-31 00:20:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-03-31 00:20:57,960 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:59,065 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2023-03-31 00:20:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-31 00:20:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-03-31 00:20:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:59,068 INFO L225 Difference]: With dead ends: 142 [2023-03-31 00:20:59,069 INFO L226 Difference]: Without dead ends: 124 [2023-03-31 00:20:59,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 142 SyntacticMatches, 16 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-03-31 00:20:59,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:59,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 22 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-03-31 00:20:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-03-31 00:20:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2023-03-31 00:20:59,089 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 87 [2023-03-31 00:20:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:59,089 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2023-03-31 00:20:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:20:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2023-03-31 00:20:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-31 00:20:59,091 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:59,091 INFO L195 NwaCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:59,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:59,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:59,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:59,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 6 times [2023-03-31 00:20:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325024977] [2023-03-31 00:20:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:01,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:21:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:21:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:21:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325024977] [2023-03-31 00:21:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325024977] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:21:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627023853] [2023-03-31 00:21:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:21:01,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:21:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:21:01,118 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) [2023-03-31 00:21:01,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:21:01,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-03-31 00:21:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:21:01,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:21:01,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:21:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-03-31 00:21:01,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:21:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-03-31 00:21:01,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627023853] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:21:01,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:21:01,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 67 [2023-03-31 00:21:01,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139881916] [2023-03-31 00:21:01,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:21:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-03-31 00:21:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:21:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-03-31 00:21:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2023-03-31 00:21:01,479 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:21:03,180 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2023-03-31 00:21:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-03-31 00:21:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2023-03-31 00:21:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:21:03,182 INFO L225 Difference]: With dead ends: 145 [2023-03-31 00:21:03,182 INFO L226 Difference]: Without dead ends: 140 [2023-03-31 00:21:03,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2023-03-31 00:21:03,185 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:21:03,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 27 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:21:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-03-31 00:21:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-03-31 00:21:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-03-31 00:21:03,193 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 123 [2023-03-31 00:21:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:21:03,193 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-03-31 00:21:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-03-31 00:21:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-03-31 00:21:03,195 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:21:03,195 INFO L195 NwaCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:21:03,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 00:21:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:21:03,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:21:03,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:21:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 7 times [2023-03-31 00:21:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:21:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373006787] [2023-03-31 00:21:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:21:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:21:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:21:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:21:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:21:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373006787] [2023-03-31 00:21:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373006787] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:21:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536374926] [2023-03-31 00:21:05,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:21:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:21:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:21:05,162 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) [2023-03-31 00:21:05,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:21:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:05,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2023-03-31 00:21:05,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:21:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:21:05,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:21:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:21:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536374926] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:21:08,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:21:08,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 104 [2023-03-31 00:21:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851733943] [2023-03-31 00:21:08,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:21:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-03-31 00:21:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:21:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-03-31 00:21:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2023-03-31 00:21:08,092 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:21:11,864 INFO L93 Difference]: Finished difference Result 217 states and 302 transitions. [2023-03-31 00:21:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-03-31 00:21:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2023-03-31 00:21:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:21:11,865 INFO L225 Difference]: With dead ends: 217 [2023-03-31 00:21:11,866 INFO L226 Difference]: Without dead ends: 212 [2023-03-31 00:21:11,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 214 SyntacticMatches, 30 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7414 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2023-03-31 00:21:11,869 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 258 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:21:11,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 17 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:21:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-03-31 00:21:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-03-31 00:21:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2023-03-31 00:21:11,878 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 139 [2023-03-31 00:21:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:21:11,879 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2023-03-31 00:21:11,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2023-03-31 00:21:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-03-31 00:21:11,881 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:21:11,881 INFO L195 NwaCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:21:11,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:21:12,090 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,SelfDestructingSolverStorable9 [2023-03-31 00:21:12,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:21:12,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:21:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1013048454, now seen corresponding path program 8 times [2023-03-31 00:21:12,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:21:12,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862922977] [2023-03-31 00:21:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:21:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:21:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:21:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2023-03-31 00:21:13,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:21:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862922977] [2023-03-31 00:21:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862922977] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:21:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107410624] [2023-03-31 00:21:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:21:13,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:21:13,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:21:13,982 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) [2023-03-31 00:21:13,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:21:14,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:21:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:21:14,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 108 conjunts are in the unsatisfiable core [2023-03-31 00:21:14,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:21:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2023-03-31 00:21:14,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:21:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2023-03-31 00:21:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107410624] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:21:15,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:21:15,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 58 [2023-03-31 00:21:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296871018] [2023-03-31 00:21:15,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:21:15,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-03-31 00:21:15,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:21:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-03-31 00:21:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 00:21:15,116 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:21:19,018 INFO L93 Difference]: Finished difference Result 2868 states and 4243 transitions. [2023-03-31 00:21:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-03-31 00:21:19,018 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2023-03-31 00:21:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:21:19,027 INFO L225 Difference]: With dead ends: 2868 [2023-03-31 00:21:19,027 INFO L226 Difference]: Without dead ends: 2863 [2023-03-31 00:21:19,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 418 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=332, Invalid=11878, Unknown=0, NotChecked=0, Total=12210 [2023-03-31 00:21:19,030 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 216 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 8752 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:21:19,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 282 Invalid, 8754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 8752 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 00:21:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2023-03-31 00:21:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2023-03-31 00:21:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2023-03-31 00:21:19,071 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2023-03-31 00:21:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:21:19,072 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2023-03-31 00:21:19,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2023-03-31 00:21:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-03-31 00:21:19,074 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:21:19,074 INFO L195 NwaCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:21:19,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:21:19,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:21:19,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:21:19,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:21:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash -348339615, now seen corresponding path program 9 times [2023-03-31 00:21:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:21:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561090376] [2023-03-31 00:21:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:21:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:21:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:20,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:21:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:21:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2023-03-31 00:21:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:21:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561090376] [2023-03-31 00:21:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561090376] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:21:20,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:21:20,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2023-03-31 00:21:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676423061] [2023-03-31 00:21:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:21:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-03-31 00:21:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:21:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-03-31 00:21:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2023-03-31 00:21:20,564 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:21:21,397 INFO L93 Difference]: Finished difference Result 313 states and 413 transitions. [2023-03-31 00:21:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-31 00:21:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2023-03-31 00:21:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:21:21,399 INFO L225 Difference]: With dead ends: 313 [2023-03-31 00:21:21,399 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 00:21:21,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2023-03-31 00:21:21,403 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:21:21,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:21:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 00:21:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 00:21:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 00:21:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 00:21:21,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2023-03-31 00:21:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:21:21,404 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 00:21:21,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:21:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 00:21:21,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 00:21:21,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 00:21:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 00:21:21,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 12) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 14 16) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2023-03-31 00:21:24,048 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 33) no Hoare annotation was computed. [2023-03-31 00:21:24,057 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= main_~y~0 69) (<= 69 main_~y~0) (< main_~x~0 70) (<= 69 main_~x~0)) (and (< main_~x~0 76) (<= 75 main_~y~0) (<= 75 main_~x~0) (<= main_~y~0 75)) (and (<= 80 main_~x~0) (<= main_~y~0 80) (< main_~x~0 81) (<= 80 main_~y~0)) (and (<= 58 main_~x~0) (<= main_~x~0 58) (<= 58 main_~y~0) (<= main_~y~0 58)) (and (< main_~x~0 89) (<= main_~y~0 88) (<= 88 main_~y~0) (<= 88 main_~x~0)) (and (< main_~x~0 85) (<= 84 main_~x~0) (<= main_~y~0 84) (<= 84 main_~y~0)) (and (<= 77 main_~y~0) (< main_~x~0 78) (<= main_~y~0 77) (<= 77 main_~x~0)) (and (<= 66 main_~y~0) (<= main_~y~0 66) (<= 66 main_~x~0) (< main_~x~0 67)) (and (< main_~x~0 97) (<= 96 main_~y~0) (<= 96 main_~x~0) (<= main_~y~0 96)) (and (<= 74 main_~x~0) (<= 74 main_~y~0) (<= main_~y~0 74) (< main_~x~0 75)) (and (< main_~x~0 77) (<= 76 main_~x~0) (<= main_~y~0 76) (<= 76 main_~y~0)) (and (< main_~x~0 94) (<= 93 main_~y~0) (<= main_~y~0 93) (<= 93 main_~x~0)) (and (<= main_~y~0 53) (<= 53 main_~x~0) (<= 53 main_~y~0) (<= main_~x~0 53)) (and (<= 78 main_~y~0) (<= 78 main_~x~0) (< main_~x~0 79) (<= main_~y~0 78)) (and (<= 92 main_~y~0) (<= 92 main_~x~0) (<= main_~y~0 92) (< main_~x~0 93)) (and (<= main_~y~0 56) (<= main_~x~0 56) (<= 56 main_~x~0) (<= 56 main_~y~0)) (and (<= 51 main_~y~0) (<= main_~x~0 51) (<= 51 main_~x~0) (<= main_~y~0 51)) (and (<= 90 main_~y~0) (<= main_~y~0 90) (<= 90 main_~x~0) (< main_~x~0 91)) (and (<= 70 main_~x~0) (<= 70 main_~y~0) (<= main_~y~0 70) (< main_~x~0 71)) (and (<= main_~y~0 68) (<= 68 main_~y~0) (<= 68 main_~x~0) (< main_~x~0 69)) (and (<= main_~x~0 55) (<= 55 main_~y~0) (<= main_~y~0 55) (<= 55 main_~x~0)) (and (<= 81 main_~x~0) (<= main_~y~0 81) (< main_~x~0 82) (<= 81 main_~y~0)) (and (<= main_~x~0 63) (<= 63 main_~x~0) (<= 63 main_~y~0) (<= main_~y~0 63)) (and (<= 65 main_~y~0) (<= main_~y~0 65) (<= 65 main_~x~0) (< main_~x~0 66)) (and (<= main_~x~0 60) (<= 60 main_~y~0) (<= main_~y~0 60) (<= 60 main_~x~0)) (and (<= 97 main_~y~0) (< main_~x~0 98) (<= 97 main_~x~0) (<= main_~y~0 97)) (and (<= main_~y~0 85) (<= 85 main_~x~0) (<= 85 main_~y~0) (< main_~x~0 86)) (and (<= main_~y~0 59) (<= main_~x~0 59) (<= 59 main_~x~0) (<= 59 main_~y~0)) (and (<= 86 main_~y~0) (< main_~x~0 87) (<= 86 main_~x~0) (<= main_~y~0 86)) (and (<= 54 main_~y~0) (<= main_~x~0 54) (<= 54 main_~x~0) (<= main_~y~0 54)) (and (<= main_~y~0 72) (< main_~x~0 73) (<= 72 main_~x~0) (<= 72 main_~y~0)) (and (<= 91 main_~y~0) (<= main_~y~0 91) (<= 91 main_~x~0) (< main_~x~0 92)) (and (<= main_~y~0 52) (<= main_~x~0 52) (<= 52 main_~x~0) (<= 52 main_~y~0)) (and (<= 62 main_~x~0) (<= main_~y~0 62) (<= main_~x~0 62) (<= 62 main_~y~0)) (and (<= main_~y~0 57) (<= 57 main_~x~0) (<= 57 main_~y~0) (<= main_~x~0 57)) (and (<= main_~y~0 71) (<= 71 main_~y~0) (< main_~x~0 72) (<= 71 main_~x~0)) (and (<= 79 main_~x~0) (< main_~x~0 80) (<= main_~y~0 79) (<= 79 main_~y~0)) (and (<= main_~x~0 61) (<= main_~y~0 61) (<= 61 main_~x~0) (<= 61 main_~y~0)) (and (< main_~x~0 100) (<= 99 main_~x~0) (<= main_~y~0 99) (<= 99 main_~y~0)) (and (<= 64 main_~y~0) (<= main_~y~0 64) (<= main_~x~0 64) (<= 64 main_~x~0)) (and (<= main_~y~0 73) (<= 73 main_~x~0) (< main_~x~0 74) (<= 73 main_~y~0)) (and (<= 82 main_~x~0) (<= 82 main_~y~0) (<= main_~y~0 82) (< main_~x~0 83)) (and (<= main_~y~0 94) (<= 94 main_~x~0) (<= 94 main_~y~0) (< main_~x~0 95)) (and (<= 50 main_~y~0) (<= main_~x~0 50) (<= main_~y~0 50)) (and (< main_~x~0 99) (<= 98 main_~y~0) (<= 98 main_~x~0) (<= main_~y~0 98)) (and (<= 83 main_~x~0) (< main_~x~0 84) (<= 83 main_~y~0) (<= main_~y~0 83)) (and (< main_~x~0 88) (<= main_~y~0 87) (<= 87 main_~x~0) (<= 87 main_~y~0)) (and (<= main_~y~0 67) (<= 67 main_~x~0) (<= 67 main_~y~0) (< main_~x~0 68)) (and (< 99 main_~y~0) (<= 100 main_~x~0) (<= main_~y~0 100)) (and (<= 95 main_~x~0) (< main_~x~0 96) (<= 95 main_~y~0) (<= main_~y~0 95)) (and (<= main_~y~0 89) (<= 89 main_~y~0) (<= 89 main_~x~0) (< main_~x~0 90))) [2023-03-31 00:21:24,057 INFO L895 garLoopResultBuilder]: At program point L27-2(lines 27 34) the Hoare annotation is: (and (< 99 main_~y~0) (<= main_~y~0 100)) [2023-03-31 00:21:24,057 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 24 37) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 24 37) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 37) the Hoare annotation is: true [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-03-31 00:21:24,058 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-03-31 00:21:24,061 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2023-03-31 00:21:24,062 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 00:21:24,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 12:21:24 BoogieIcfgContainer [2023-03-31 00:21:24,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 00:21:24,081 INFO L158 Benchmark]: Toolchain (without parser) took 32785.77ms. Allocated memory was 250.6MB in the beginning and 434.1MB in the end (delta: 183.5MB). Free memory was 203.0MB in the beginning and 396.3MB in the end (delta: -193.4MB). Peak memory consumption was 246.7MB. Max. memory is 8.0GB. [2023-03-31 00:21:24,081 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 200.3MB. Free memory was 150.7MB in the beginning and 150.6MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 00:21:24,082 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.70ms. Allocated memory is still 250.6MB. Free memory was 202.8MB in the beginning and 192.1MB in the end (delta: 10.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-03-31 00:21:24,082 INFO L158 Benchmark]: Boogie Preprocessor took 28.04ms. Allocated memory is still 250.6MB. Free memory was 192.1MB in the beginning and 190.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 00:21:24,082 INFO L158 Benchmark]: RCFGBuilder took 231.14ms. Allocated memory is still 250.6MB. Free memory was 190.5MB in the beginning and 180.8MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 00:21:24,082 INFO L158 Benchmark]: TraceAbstraction took 32325.13ms. Allocated memory was 250.6MB in the beginning and 434.1MB in the end (delta: 183.5MB). Free memory was 180.1MB in the beginning and 396.3MB in the end (delta: -216.3MB). Peak memory consumption was 223.6MB. Max. memory is 8.0GB. [2023-03-31 00:21:24,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 200.3MB. Free memory was 150.7MB in the beginning and 150.6MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.70ms. Allocated memory is still 250.6MB. Free memory was 202.8MB in the beginning and 192.1MB in the end (delta: 10.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.04ms. Allocated memory is still 250.6MB. Free memory was 192.1MB in the beginning and 190.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 231.14ms. Allocated memory is still 250.6MB. Free memory was 190.5MB in the beginning and 180.8MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 32325.13ms. Allocated memory was 250.6MB in the beginning and 434.1MB in the end (delta: 183.5MB). Free memory was 180.1MB in the beginning and 396.3MB in the end (delta: -216.3MB). Peak memory consumption was 223.6MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.3s, OverallIterations: 12, TraceHistogramMax: 101, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 971 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 970 mSDsluCounter, 517 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 455 mSDsCounter, 191 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10075 IncrementalHoareTripleChecker+Invalid, 10266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 191 mSolverCounterUnsat, 62 mSDtfsCounter, 10075 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2233 GetRequests, 1373 SyntacticMatches, 50 SemanticMatches, 810 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15274 ImplicationChecksByTransitivity, 17.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=11, InterpolantAutomatonStates: 431, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 2649 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 120 NumberOfFragments, 676 HoareAnnotationTreeSize, 18 FomulaSimplifications, 23301 FormulaSimplificationTreeSizeReduction, 1.8s HoareSimplificationTime, 7 FomulaSimplificationsInter, 500 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 1665 NumberOfCodeBlocks, 1583 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2350 ConstructedInterpolants, 0 QuantifiedInterpolants, 8132 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1685 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 26464/68563 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 69 && 69 <= y) && x < 70) && 69 <= x) || (((x < 76 && 75 <= y) && 75 <= x) && y <= 75)) || (((80 <= x && y <= 80) && x < 81) && 80 <= y)) || (((58 <= x && x <= 58) && 58 <= y) && y <= 58)) || (((x < 89 && y <= 88) && 88 <= y) && 88 <= x)) || (((x < 85 && 84 <= x) && y <= 84) && 84 <= y)) || (((77 <= y && x < 78) && y <= 77) && 77 <= x)) || (((66 <= y && y <= 66) && 66 <= x) && x < 67)) || (((x < 97 && 96 <= y) && 96 <= x) && y <= 96)) || (((74 <= x && 74 <= y) && y <= 74) && x < 75)) || (((x < 77 && 76 <= x) && y <= 76) && 76 <= y)) || (((x < 94 && 93 <= y) && y <= 93) && 93 <= x)) || (((y <= 53 && 53 <= x) && 53 <= y) && x <= 53)) || (((78 <= y && 78 <= x) && x < 79) && y <= 78)) || (((92 <= y && 92 <= x) && y <= 92) && x < 93)) || (((y <= 56 && x <= 56) && 56 <= x) && 56 <= y)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((90 <= y && y <= 90) && 90 <= x) && x < 91)) || (((70 <= x && 70 <= y) && y <= 70) && x < 71)) || (((y <= 68 && 68 <= y) && 68 <= x) && x < 69)) || (((x <= 55 && 55 <= y) && y <= 55) && 55 <= x)) || (((81 <= x && y <= 81) && x < 82) && 81 <= y)) || (((x <= 63 && 63 <= x) && 63 <= y) && y <= 63)) || (((65 <= y && y <= 65) && 65 <= x) && x < 66)) || (((x <= 60 && 60 <= y) && y <= 60) && 60 <= x)) || (((97 <= y && x < 98) && 97 <= x) && y <= 97)) || (((y <= 85 && 85 <= x) && 85 <= y) && x < 86)) || (((y <= 59 && x <= 59) && 59 <= x) && 59 <= y)) || (((86 <= y && x < 87) && 86 <= x) && y <= 86)) || (((54 <= y && x <= 54) && 54 <= x) && y <= 54)) || (((y <= 72 && x < 73) && 72 <= x) && 72 <= y)) || (((91 <= y && y <= 91) && 91 <= x) && x < 92)) || (((y <= 52 && x <= 52) && 52 <= x) && 52 <= y)) || (((62 <= x && y <= 62) && x <= 62) && 62 <= y)) || (((y <= 57 && 57 <= x) && 57 <= y) && x <= 57)) || (((y <= 71 && 71 <= y) && x < 72) && 71 <= x)) || (((79 <= x && x < 80) && y <= 79) && 79 <= y)) || (((x <= 61 && y <= 61) && 61 <= x) && 61 <= y)) || (((x < 100 && 99 <= x) && y <= 99) && 99 <= y)) || (((64 <= y && y <= 64) && x <= 64) && 64 <= x)) || (((y <= 73 && 73 <= x) && x < 74) && 73 <= y)) || (((82 <= x && 82 <= y) && y <= 82) && x < 83)) || (((y <= 94 && 94 <= x) && 94 <= y) && x < 95)) || ((50 <= y && x <= 50) && y <= 50)) || (((x < 99 && 98 <= y) && 98 <= x) && y <= 98)) || (((83 <= x && x < 84) && 83 <= y) && y <= 83)) || (((x < 88 && y <= 87) && 87 <= x) && 87 <= y)) || (((y <= 67 && 67 <= x) && 67 <= y) && x < 68)) || ((99 < y && 100 <= x) && y <= 100)) || (((95 <= x && x < 96) && 95 <= y) && y <= 95)) || (((y <= 89 && 89 <= y) && 89 <= x) && x < 90) RESULT: Ultimate proved your program to be correct! [2023-03-31 00:21:24,114 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 0 Received shutdown request...