/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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:01:58,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:01:58,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:01:58,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 00:01:58,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 00:01:58,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 00:01:58,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 00:01:58,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 00:01:58,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 00:01:58,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 00:01:58,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 00:01:58,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 00:01:58,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:01:58,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:01:58,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:01:58,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:01:58,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:01:58,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:01:58,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:01:58,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:01:58,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:01:58,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:01:58,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:01:58,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:01:58,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 00:01:58,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 00:01:58,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 00:01:58,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 00:01:58,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 00:01:58,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 00:01:58,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 00:01:58,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 00:01:58,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 00:01:58,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 00:01:58,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 00:01:58,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 00:01:58,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 00:01:58,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 00:01:58,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:01:58,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:01:58,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:01:58,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 00:01:58,933 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:01:58,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:01:58,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:01:58,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:01:58,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:01:58,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:01:58,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:01:58,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:01:58,942 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:01:58,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:01:58,943 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:01:58,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:01:58,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:01:58,945 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:01:58,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:01:58,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:01:58,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:01:58,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:01:58,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:01:58,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:01:58,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:01:58,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:01:58,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:01:58,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:01:58,946 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:01:58,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:01:58,948 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:01:58,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:01:58,949 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:01:58,949 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:01:59,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:01:59,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:01:59,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:01:59,449 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:01:59,450 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:01:59,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label53.c [2023-04-02 00:02:01,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:02:02,430 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:02:02,430 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label53.c [2023-04-02 00:02:02,561 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a12f924/ab87e0b161ea44a8865d47a473cb2cd8/FLAG0b5d32318 [2023-04-02 00:02:02,576 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a12f924/ab87e0b161ea44a8865d47a473cb2cd8 [2023-04-02 00:02:02,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:02:02,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:02:02,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:02:02,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:02:02,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:02:02,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:02:02" (1/1) ... [2023-04-02 00:02:02,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a32cc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:02, skipping insertion in model container [2023-04-02 00:02:02,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:02:02" (1/1) ... [2023-04-02 00:02:02,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:02:02,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:02:03,519 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_label53.c[1928,1941] [2023-04-02 00:02:05,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:02:05,739 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:02:05,780 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_label53.c[1928,1941] [2023-04-02 00:02:07,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:02:07,147 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:02:07,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07 WrapperNode [2023-04-02 00:02:07,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:02:07,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:02:07,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:02:07,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:02:07,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:07,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:08,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:02:08,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:02:08,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:02:08,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:02:08,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (1/1) ... [2023-04-02 00:02:08,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:02:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:08,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 00:02:08,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 00:02:08,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:02:08,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:02:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:02:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 00:02:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 00:02:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 00:02:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 00:02:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 00:02:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 00:02:08,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:02:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 00:02:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 00:02:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:02:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:02:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:02:08,385 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:02:08,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:02:17,910 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:02:17,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:02:17,939 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 00:02:17,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:17 BoogieIcfgContainer [2023-04-02 00:02:17,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:02:17,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:02:17,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:02:17,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:02:17,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:02:02" (1/3) ... [2023-04-02 00:02:17,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ce290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:17, skipping insertion in model container [2023-04-02 00:02:17,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:07" (2/3) ... [2023-04-02 00:02:17,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ce290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:17, skipping insertion in model container [2023-04-02 00:02:17,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:17" (3/3) ... [2023-04-02 00:02:17,964 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label53.c [2023-04-02 00:02:17,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:02:17,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:02:18,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:02:18,128 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;@d44821d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:02:18,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:02:18,138 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) [2023-04-02 00:02:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 00:02:18,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:18,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:18,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:18,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1850428536, now seen corresponding path program 1 times [2023-04-02 00:02:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:18,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953790009] [2023-04-02 00:02:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953790009] [2023-04-02 00:02:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953790009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:18,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 00:02:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321828127] [2023-04-02 00:02:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:18,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:02:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:02:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:02:18,661 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 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-04-02 00:02:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:33,121 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-04-02 00:02:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 00:02:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2023-04-02 00:02:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:33,162 INFO L225 Difference]: With dead ends: 5076 [2023-04-02 00:02:33,162 INFO L226 Difference]: Without dead ends: 3219 [2023-04-02 00:02:33,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:02:33,174 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4677 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4677 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:33,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4677 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2023-04-02 00:02:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-04-02 00:02:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-04-02 00:02:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-04-02 00:02:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-04-02 00:02:33,463 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 17 [2023-04-02 00:02:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:33,463 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-04-02 00:02:33,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-04-02 00:02:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-04-02 00:02:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-02 00:02:33,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:33,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:33,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:02:33,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:33,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -234654096, now seen corresponding path program 1 times [2023-04-02 00:02:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:33,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015635808] [2023-04-02 00:02:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:33,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:33,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015635808] [2023-04-02 00:02:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015635808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 00:02:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007618738] [2023-04-02 00:02:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:33,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:02:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:02:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:02:33,867 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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) [2023-04-02 00:03:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:05,963 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-04-02 00:03:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 00:03:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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 88 [2023-04-02 00:03:05,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:06,059 INFO L225 Difference]: With dead ends: 20617 [2023-04-02 00:03:06,060 INFO L226 Difference]: Without dead ends: 17429 [2023-04-02 00:03:06,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-04-02 00:03:06,080 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11623 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11623 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3776 IncrementalHoareTripleChecker+Valid, 28036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:06,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11623 Valid, 1043 Invalid, 31812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3776 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 31.1s Time] [2023-04-02 00:03:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-04-02 00:03:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-04-02 00:03:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.3166025416812406) internal successors, (22585), 17166 states have internal predecessors, (22585), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-04-02 00:03:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23469 transitions. [2023-04-02 00:03:06,498 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23469 transitions. Word has length 88 [2023-04-02 00:03:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:06,498 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23469 transitions. [2023-04-02 00:03:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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) [2023-04-02 00:03:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23469 transitions. [2023-04-02 00:03:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 00:03:06,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:06,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:03:06,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:06,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 68239496, now seen corresponding path program 1 times [2023-04-02 00:03:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:06,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014884931] [2023-04-02 00:03:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:06,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:03:06,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014884931] [2023-04-02 00:03:06,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014884931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:06,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:03:06,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:03:06,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262918335] [2023-04-02 00:03:06,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:06,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:03:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:06,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:03:06,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:03:06,935 INFO L87 Difference]: Start difference. First operand 17373 states and 23469 transitions. Second operand has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-04-02 00:03:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:21,091 INFO L93 Difference]: Finished difference Result 51229 states and 72277 transitions. [2023-04-02 00:03:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 00:03:21,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 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 118 [2023-04-02 00:03:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:21,354 INFO L225 Difference]: With dead ends: 51229 [2023-04-02 00:03:21,354 INFO L226 Difference]: Without dead ends: 33862 [2023-04-02 00:03:21,384 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 [2023-04-02 00:03:21,387 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 8899 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 10631 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8899 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 12768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:21,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8899 Valid, 1102 Invalid, 12768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10631 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2023-04-02 00:03:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-04-02 00:03:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33708. [2023-04-02 00:03:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33708 states, 33057 states have (on average 1.2129352330822518) internal successors, (40096), 33128 states have internal predecessors, (40096), 140 states have call successors, (140), 140 states have call predecessors, (140), 510 states have return successors, (3490), 439 states have call predecessors, (3490), 139 states have call successors, (3490) [2023-04-02 00:03:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33708 states to 33708 states and 43726 transitions. [2023-04-02 00:03:22,062 INFO L78 Accepts]: Start accepts. Automaton has 33708 states and 43726 transitions. Word has length 118 [2023-04-02 00:03:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:22,064 INFO L495 AbstractCegarLoop]: Abstraction has 33708 states and 43726 transitions. [2023-04-02 00:03:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-04-02 00:03:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 33708 states and 43726 transitions. [2023-04-02 00:03:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-04-02 00:03:22,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:22,072 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:22,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:03:22,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:22,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -947410034, now seen corresponding path program 1 times [2023-04-02 00:03:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645970556] [2023-04-02 00:03:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:22,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:22,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:22,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-02 00:03:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 00:03:22,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:22,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645970556] [2023-04-02 00:03:22,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645970556] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:22,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885254717] [2023-04-02 00:03:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:22,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:22,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:03:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 00:03:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:23,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 00:03:23,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 00:03:23,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:03:23,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885254717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:23,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:03:23,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-02 00:03:23,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345282750] [2023-04-02 00:03:23,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 00:03:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 00:03:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:03:23,444 INFO L87 Difference]: Start difference. First operand 33708 states and 43726 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 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) [2023-04-02 00:03:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:36,446 INFO L93 Difference]: Finished difference Result 101284 states and 135130 transitions. [2023-04-02 00:03:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 00:03:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 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 212 [2023-04-02 00:03:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:37,003 INFO L225 Difference]: With dead ends: 101284 [2023-04-02 00:03:37,003 INFO L226 Difference]: Without dead ends: 67582 [2023-04-02 00:03:37,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-02 00:03:37,186 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 7865 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 8317 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7865 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 9217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 8317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:37,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7865 Valid, 993 Invalid, 9217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 8317 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2023-04-02 00:03:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67582 states. [2023-04-02 00:03:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67582 to 59046. [2023-04-02 00:03:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59046 states, 57641 states have (on average 1.2045766034593433) internal successors, (69433), 57833 states have internal predecessors, (69433), 242 states have call successors, (242), 242 states have call predecessors, (242), 1162 states have return successors, (7722), 970 states have call predecessors, (7722), 241 states have call successors, (7722) [2023-04-02 00:03:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59046 states to 59046 states and 77397 transitions. [2023-04-02 00:03:40,912 INFO L78 Accepts]: Start accepts. Automaton has 59046 states and 77397 transitions. Word has length 212 [2023-04-02 00:03:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:40,913 INFO L495 AbstractCegarLoop]: Abstraction has 59046 states and 77397 transitions. [2023-04-02 00:03:40,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 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) [2023-04-02 00:03:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 59046 states and 77397 transitions. [2023-04-02 00:03:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-04-02 00:03:40,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:40,936 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-04-02 00:03:40,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:41,144 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 [2023-04-02 00:03:41,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:41,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -793218173, now seen corresponding path program 1 times [2023-04-02 00:03:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732051054] [2023-04-02 00:03:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:41,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:42,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:03:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 00:03:42,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:42,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732051054] [2023-04-02 00:03:42,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732051054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:42,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198186637] [2023-04-02 00:03:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:42,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:42,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:03:42,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 00:03:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:42,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:03:42,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:03:43,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:03:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:03:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198186637] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:03:44,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:03:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:03:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484147170] [2023-04-02 00:03:44,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:03:44,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:03:44,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:03:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:03:44,100 INFO L87 Difference]: Start difference. First operand 59046 states and 77397 transitions. Second operand has 12 states, 12 states have (on average 59.416666666666664) internal successors, (713), 10 states have internal predecessors, (713), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:04:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:04:09,300 INFO L93 Difference]: Finished difference Result 181438 states and 260314 transitions. [2023-04-02 00:04:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 00:04:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 59.416666666666664) internal successors, (713), 10 states have internal predecessors, (713), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 392 [2023-04-02 00:04:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:04:10,539 INFO L225 Difference]: With dead ends: 181438 [2023-04-02 00:04:10,539 INFO L226 Difference]: Without dead ends: 122398 [2023-04-02 00:04:10,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 786 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-02 00:04:10,892 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 14106 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 21980 mSolverCounterSat, 7226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14106 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 29206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7226 IncrementalHoareTripleChecker+Valid, 21980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:04:10,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14106 Valid, 1377 Invalid, 29206 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7226 Valid, 21980 Invalid, 0 Unknown, 0 Unchecked, 22.9s Time] [2023-04-02 00:04:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122398 states. [2023-04-02 00:04:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122398 to 117673. [2023-04-02 00:04:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117673 states, 114214 states have (on average 1.2017528499133205) internal successors, (137257), 114799 states have internal predecessors, (137257), 476 states have call successors, (476), 476 states have call predecessors, (476), 2982 states have return successors, (27064), 2397 states have call predecessors, (27064), 475 states have call successors, (27064) [2023-04-02 00:04:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117673 states to 117673 states and 164797 transitions. [2023-04-02 00:04:17,418 INFO L78 Accepts]: Start accepts. Automaton has 117673 states and 164797 transitions. Word has length 392 [2023-04-02 00:04:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:04:17,419 INFO L495 AbstractCegarLoop]: Abstraction has 117673 states and 164797 transitions. [2023-04-02 00:04:17,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.416666666666664) internal successors, (713), 10 states have internal predecessors, (713), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:04:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 117673 states and 164797 transitions. [2023-04-02 00:04:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2023-04-02 00:04:17,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:04:17,480 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:04:17,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 00:04:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:17,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:17,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1891623604, now seen corresponding path program 1 times [2023-04-02 00:04:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:17,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76657156] [2023-04-02 00:04:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:17,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:04:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:04:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:04:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:04:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:04:19,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:04:19,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76657156] [2023-04-02 00:04:19,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76657156] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:04:19,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452525246] [2023-04-02 00:04:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:19,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:04:19,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:04:19,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 00:04:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:20,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 00:04:20,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:04:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:04:23,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:04:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 23 proven. 217 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 00:04:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452525246] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:04:33,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:04:33,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 11 [2023-04-02 00:04:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835602527] [2023-04-02 00:04:33,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:04:33,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 00:04:33,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:04:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 00:04:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-02 00:04:33,133 INFO L87 Difference]: Start difference. First operand 117673 states and 164797 transitions. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 9 states have internal predecessors, (1724), 7 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-02 00:05:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:05:02,056 INFO L93 Difference]: Finished difference Result 433851 states and 645240 transitions. [2023-04-02 00:05:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 00:05:02,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 9 states have internal predecessors, (1724), 7 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 735 [2023-04-02 00:05:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:05:04,396 INFO L225 Difference]: With dead ends: 433851 [2023-04-02 00:05:04,400 INFO L226 Difference]: Without dead ends: 316184 [2023-04-02 00:05:04,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1524 GetRequests, 1492 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 00:05:04,744 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 34281 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 14741 mSolverCounterSat, 8596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34281 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 23337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8596 IncrementalHoareTripleChecker+Valid, 14741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:05:04,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34281 Valid, 1381 Invalid, 23337 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8596 Valid, 14741 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2023-04-02 00:05:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316184 states. [2023-04-02 00:05:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316184 to 293427. [2023-04-02 00:05:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293427 states, 286717 states have (on average 1.1447978320085659) internal successors, (328233), 287764 states have internal predecessors, (328233), 1214 states have call successors, (1214), 1214 states have call predecessors, (1214), 5495 states have return successors, (57892), 4448 states have call predecessors, (57892), 1213 states have call successors, (57892) [2023-04-02 00:05:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293427 states to 293427 states and 387339 transitions. [2023-04-02 00:05:15,848 INFO L78 Accepts]: Start accepts. Automaton has 293427 states and 387339 transitions. Word has length 735 [2023-04-02 00:05:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:05:15,852 INFO L495 AbstractCegarLoop]: Abstraction has 293427 states and 387339 transitions. [2023-04-02 00:05:15,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 9 states have internal predecessors, (1724), 7 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-02 00:05:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 293427 states and 387339 transitions. [2023-04-02 00:05:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2023-04-02 00:05:15,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:05:15,946 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:05:15,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 00:05:16,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:05:16,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:05:16,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:05:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -696447601, now seen corresponding path program 1 times [2023-04-02 00:05:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:05:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193342172] [2023-04-02 00:05:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:05:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:05:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:05:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:05:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:19,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:05:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2023-04-02 00:05:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:19,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2023-04-02 00:05:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:05:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 126 proven. 100 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-04-02 00:05:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:05:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193342172] [2023-04-02 00:05:20,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193342172] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:05:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126050468] [2023-04-02 00:05:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:05:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:05:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:05:20,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:05:20,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 00:05:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:20,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:05:20,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:05:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 00:05:20,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:05:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 130 proven. 101 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-04-02 00:05:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126050468] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:05:21,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:05:21,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-04-02 00:05:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570315682] [2023-04-02 00:05:21,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:05:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:05:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:05:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:05:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:05:21,057 INFO L87 Difference]: Start difference. First operand 293427 states and 387339 transitions. Second operand has 12 states, 12 states have (on average 94.0) internal successors, (1128), 10 states have internal predecessors, (1128), 4 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 00:05:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:05:53,449 INFO L93 Difference]: Finished difference Result 739511 states and 1043220 transitions. [2023-04-02 00:05:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-02 00:05:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 94.0) internal successors, (1128), 10 states have internal predecessors, (1128), 4 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 950 [2023-04-02 00:05:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:05:57,113 INFO L225 Difference]: With dead ends: 739511 [2023-04-02 00:05:57,113 INFO L226 Difference]: Without dead ends: 447479 [2023-04-02 00:05:58,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1979 GetRequests, 1935 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 00:05:58,005 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 19289 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 23549 mSolverCounterSat, 6186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19293 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 29735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6186 IncrementalHoareTripleChecker+Valid, 23549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:05:58,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19293 Valid, 1931 Invalid, 29735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6186 Valid, 23549 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-04-02 00:05:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447479 states. [2023-04-02 00:06:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447479 to 431287. [2023-04-02 00:06:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431287 states, 420771 states have (on average 1.091493948014478) internal successors, (459269), 422560 states have internal predecessors, (459269), 1778 states have call successors, (1778), 1778 states have call predecessors, (1778), 8737 states have return successors, (74500), 6948 states have call predecessors, (74500), 1777 states have call successors, (74500) [2023-04-02 00:06:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431287 states to 431287 states and 535547 transitions. [2023-04-02 00:06:14,797 INFO L78 Accepts]: Start accepts. Automaton has 431287 states and 535547 transitions. Word has length 950 [2023-04-02 00:06:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:06:14,798 INFO L495 AbstractCegarLoop]: Abstraction has 431287 states and 535547 transitions. [2023-04-02 00:06:14,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 94.0) internal successors, (1128), 10 states have internal predecessors, (1128), 4 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 00:06:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 431287 states and 535547 transitions. [2023-04-02 00:06:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2023-04-02 00:06:14,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:06:14,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:06:14,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 00:06:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:06:15,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:06:15,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:06:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1623676686, now seen corresponding path program 1 times [2023-04-02 00:06:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:06:15,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123721625] [2023-04-02 00:06:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:06:15,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:06:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:06:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:06:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:06:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:06:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:06:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-02 00:06:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 934 [2023-04-02 00:06:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-04-02 00:06:18,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:06:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123721625] [2023-04-02 00:06:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123721625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:06:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016628325] [2023-04-02 00:06:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:06:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:06:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:06:18,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:06:18,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 00:06:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:06:18,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:06:18,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:06:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-04-02 00:06:18,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:06:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 245 proven. 176 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2023-04-02 00:06:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016628325] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:06:19,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:06:19,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2023-04-02 00:06:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600231076] [2023-04-02 00:06:19,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:06:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 00:06:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:06:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 00:06:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-02 00:06:19,224 INFO L87 Difference]: Start difference. First operand 431287 states and 535547 transitions. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 9 states have internal predecessors, (832), 4 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9)