/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/eca-rers2012/Problem19_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:46,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:46,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:46,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:48:46,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:48:46,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:48:46,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:48:46,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:48:46,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:48:46,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:48:46,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:48:46,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:48:46,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:46,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:46,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:46,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:46,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:46,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:46,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:46,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:46,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:46,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:46,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:46,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:46,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:46,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:46,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:46,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:46,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:46,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:46,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:46,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:46,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:46,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:46,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:46,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:46,799 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 [2023-03-30 23:48:46,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:46,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:46,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:46,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:46,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:46,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:46,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:46,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:46,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:46,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:46,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:46,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:46,827 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:46,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:46,828 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:46,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:46,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:47,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:47,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:47,017 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:47,017 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:47,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label22.c [2023-03-30 23:48:48,038 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:48,429 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:48,430 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label22.c [2023-03-30 23:48:48,466 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0417db1bd/53dd53aefb2142598c9f6f320c9a18dc/FLAGaf2ff54a3 [2023-03-30 23:48:48,479 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0417db1bd/53dd53aefb2142598c9f6f320c9a18dc [2023-03-30 23:48:48,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:48,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:48,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:48,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:48,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:48,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:48" (1/1) ... [2023-03-30 23:48:48,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24de2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:48, skipping insertion in model container [2023-03-30 23:48:48,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:48" (1/1) ... [2023-03-30 23:48:48,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:48,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:48,814 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/eca-rers2012/Problem19_label22.c[4094,4107] [2023-03-30 23:48:49,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:49,670 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:49,693 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/eca-rers2012/Problem19_label22.c[4094,4107] [2023-03-30 23:48:50,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:50,255 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:50,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50 WrapperNode [2023-03-30 23:48:50,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:50,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:50,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:50,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:50,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,502 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:50,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:50,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:50,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:50,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (1/1) ... [2023-03-30 23:48:50,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:50,634 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) [2023-03-30 23:48:50,651 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 [2023-03-30 23:48:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:48:50,737 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:48:50,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:48:56,243 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:48:56,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:48:56,262 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:48:56,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:56 BoogieIcfgContainer [2023-03-30 23:48:56,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:48:56,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:48:56,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:48:56,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:48:56,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:48" (1/3) ... [2023-03-30 23:48:56,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405e6426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:56, skipping insertion in model container [2023-03-30 23:48:56,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:50" (2/3) ... [2023-03-30 23:48:56,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405e6426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:56, skipping insertion in model container [2023-03-30 23:48:56,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:56" (3/3) ... [2023-03-30 23:48:56,280 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label22.c [2023-03-30 23:48:56,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:48:56,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:48:56,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:48:56,342 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;@6692b486, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:48:56,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:48:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:48:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 23:48:56,354 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:56,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:56,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:56,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash -717151936, now seen corresponding path program 1 times [2023-03-30 23:48:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143151362] [2023-03-30 23:48:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:56,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:56,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:56,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143151362] [2023-03-30 23:48:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143151362] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:48:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431019538] [2023-03-30 23:48:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:56,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:48:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:48:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:48:56,792 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:49:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:09,806 INFO L93 Difference]: Finished difference Result 6587 states and 12523 transitions. [2023-03-30 23:49:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:49:09,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 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 35 [2023-03-30 23:49:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:09,838 INFO L225 Difference]: With dead ends: 6587 [2023-03-30 23:49:09,838 INFO L226 Difference]: Without dead ends: 4742 [2023-03-30 23:49:09,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:09,852 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 6336 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 10950 mSolverCounterSat, 2799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6336 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 13749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2799 IncrementalHoareTripleChecker+Valid, 10950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:09,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6336 Valid, 464 Invalid, 13749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2799 Valid, 10950 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-03-30 23:49:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2023-03-30 23:49:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4621. [2023-03-30 23:49:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4566 states have (on average 1.7636881296539642) internal successors, (8053), 4569 states have internal predecessors, (8053), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (74), 31 states have call predecessors, (74), 19 states have call successors, (74) [2023-03-30 23:49:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8147 transitions. [2023-03-30 23:49:10,014 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8147 transitions. Word has length 35 [2023-03-30 23:49:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:10,015 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 8147 transitions. [2023-03-30 23:49:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:49:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8147 transitions. [2023-03-30 23:49:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-30 23:49:10,021 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:10,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:10,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:49:10,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:10,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash 285106042, now seen corresponding path program 1 times [2023-03-30 23:49:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:10,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193123263] [2023-03-30 23:49:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:10,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193123263] [2023-03-30 23:49:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193123263] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:49:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177437533] [2023-03-30 23:49:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:10,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:49:10,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:49:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:49:10,351 INFO L87 Difference]: Start difference. First operand 4621 states and 8147 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:24,955 INFO L93 Difference]: Finished difference Result 18006 states and 32711 transitions. [2023-03-30 23:49:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2023-03-30 23:49:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:25,040 INFO L225 Difference]: With dead ends: 18006 [2023-03-30 23:49:25,041 INFO L226 Difference]: Without dead ends: 13391 [2023-03-30 23:49:25,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:49:25,059 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 8090 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 17082 mSolverCounterSat, 2351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8090 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 19433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2351 IncrementalHoareTripleChecker+Valid, 17082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:25,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8090 Valid, 1224 Invalid, 19433 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2351 Valid, 17082 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2023-03-30 23:49:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13391 states. [2023-03-30 23:49:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13391 to 13312. [2023-03-30 23:49:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13312 states, 13069 states have (on average 1.5861963424898615) internal successors, (20730), 13093 states have internal predecessors, (20730), 56 states have call successors, (56), 56 states have call predecessors, (56), 186 states have return successors, (834), 162 states have call predecessors, (834), 55 states have call successors, (834) [2023-03-30 23:49:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13312 states to 13312 states and 21620 transitions. [2023-03-30 23:49:25,362 INFO L78 Accepts]: Start accepts. Automaton has 13312 states and 21620 transitions. Word has length 107 [2023-03-30 23:49:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:25,363 INFO L495 AbstractCegarLoop]: Abstraction has 13312 states and 21620 transitions. [2023-03-30 23:49:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 13312 states and 21620 transitions. [2023-03-30 23:49:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-30 23:49:25,371 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:25,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:25,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:25,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1326384565, now seen corresponding path program 1 times [2023-03-30 23:49:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842098316] [2023-03-30 23:49:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:25,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:25,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842098316] [2023-03-30 23:49:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842098316] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:25,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:25,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173534925] [2023-03-30 23:49:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:25,918 INFO L87 Difference]: Start difference. First operand 13312 states and 21620 transitions. Second operand has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:37,232 INFO L93 Difference]: Finished difference Result 40646 states and 69201 transitions. [2023-03-30 23:49:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:49:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2023-03-30 23:49:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:37,326 INFO L225 Difference]: With dead ends: 40646 [2023-03-30 23:49:37,326 INFO L226 Difference]: Without dead ends: 27340 [2023-03-30 23:49:37,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:49:37,361 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 5725 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 11932 mSolverCounterSat, 1780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5725 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 13712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1780 IncrementalHoareTripleChecker+Valid, 11932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:37,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5725 Valid, 1044 Invalid, 13712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1780 Valid, 11932 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-03-30 23:49:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27340 states. [2023-03-30 23:49:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27340 to 26914. [2023-03-30 23:49:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26914 states, 26235 states have (on average 1.3780064798932723) internal successors, (36152), 26325 states have internal predecessors, (36152), 110 states have call successors, (110), 110 states have call predecessors, (110), 568 states have return successors, (3561), 478 states have call predecessors, (3561), 109 states have call successors, (3561) [2023-03-30 23:49:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26914 states to 26914 states and 39823 transitions. [2023-03-30 23:49:37,894 INFO L78 Accepts]: Start accepts. Automaton has 26914 states and 39823 transitions. Word has length 162 [2023-03-30 23:49:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:37,896 INFO L495 AbstractCegarLoop]: Abstraction has 26914 states and 39823 transitions. [2023-03-30 23:49:37,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 26914 states and 39823 transitions. [2023-03-30 23:49:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-03-30 23:49:37,901 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:37,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:49:37,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:37,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1097728428, now seen corresponding path program 1 times [2023-03-30 23:49:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665646421] [2023-03-30 23:49:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-03-30 23:49:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:49:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665646421] [2023-03-30 23:49:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665646421] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:49:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318257431] [2023-03-30 23:49:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:38,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:49:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:49:38,229 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) [2023-03-30 23:49:38,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:49:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:49:38,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:49:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-30 23:49:38,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:49:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318257431] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:38,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:49:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-03-30 23:49:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322384936] [2023-03-30 23:49:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:49:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:49:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:49:38,454 INFO L87 Difference]: Start difference. First operand 26914 states and 39823 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:49:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:46,462 INFO L93 Difference]: Finished difference Result 81575 states and 126661 transitions. [2023-03-30 23:49:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:49:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 188 [2023-03-30 23:49:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:46,629 INFO L225 Difference]: With dead ends: 81575 [2023-03-30 23:49:46,629 INFO L226 Difference]: Without dead ends: 54667 [2023-03-30 23:49:46,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:49:46,685 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 8203 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 8094 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8203 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 9103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 8094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:46,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8203 Valid, 924 Invalid, 9103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 8094 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-30 23:49:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54667 states. [2023-03-30 23:49:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54667 to 46922. [2023-03-30 23:49:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46922 states, 45445 states have (on average 1.3662449114314006) internal successors, (62089), 45686 states have internal predecessors, (62089), 188 states have call successors, (188), 188 states have call predecessors, (188), 1288 states have return successors, (8553), 1047 states have call predecessors, (8553), 187 states have call successors, (8553) [2023-03-30 23:49:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46922 states to 46922 states and 70830 transitions. [2023-03-30 23:49:47,732 INFO L78 Accepts]: Start accepts. Automaton has 46922 states and 70830 transitions. Word has length 188 [2023-03-30 23:49:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:47,733 INFO L495 AbstractCegarLoop]: Abstraction has 46922 states and 70830 transitions. [2023-03-30 23:49:47,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:49:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46922 states and 70830 transitions. [2023-03-30 23:49:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-03-30 23:49:47,741 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:47,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:47,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:49:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:49:47,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:47,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -454260313, now seen corresponding path program 1 times [2023-03-30 23:49:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161759436] [2023-03-30 23:49:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:48,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:48,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2023-03-30 23:49:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 56 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:49:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:48,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161759436] [2023-03-30 23:49:48,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161759436] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:49:48,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210921844] [2023-03-30 23:49:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:48,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:49:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:49:48,449 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) [2023-03-30 23:49:48,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:49:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:48,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:49:48,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:49:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-30 23:49:48,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:49:48,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210921844] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:48,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:49:48,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-03-30 23:49:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578877627] [2023-03-30 23:49:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:49:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:49:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:49:48,822 INFO L87 Difference]: Start difference. First operand 46922 states and 70830 transitions. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 4 states have internal predecessors, (323), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)