/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:58:53,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:58:53,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:58:54,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 23:58:54,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 23:58:54,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 23:58:54,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 23:58:54,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 23:58:54,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 23:58:54,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 23:58:54,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 23:58:54,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 23:58:54,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:58:54,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:58:54,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:58:54,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:58:54,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:58:54,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:58:54,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:58:54,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:58:54,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:58:54,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:58:54,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:58:54,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:58:54,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 23:58:54,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 23:58:54,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 23:58:54,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 23:58:54,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 23:58:54,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 23:58:54,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:58:54,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:58:54,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:58:54,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:58:54,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:58:54,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:58:54,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:58:54,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:58:54,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:58:54,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:58:54,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:58:54,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:58:54,105 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:58:54,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:58:54,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:58:54,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:58:54,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:58:54,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:58:54,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:58:54,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:58:54,108 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:58:54,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:58:54,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:58:54,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:58:54,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:58:54,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:58:54,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:58:54,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:58:54,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:58:54,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:58:54,111 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:58:54,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:58:54,112 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:58:54,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:58:54,112 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:58:54,112 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:58:54,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:58:54,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:58:54,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:58:54,378 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:58:54,378 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:58:54,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2023-04-01 23:58:55,654 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:58:56,224 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:58:56,225 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2023-04-01 23:58:56,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f194f571a/ae5e3f4e89614e8fbc097a4ff27b5157/FLAGe18939b29 [2023-04-01 23:58:56,297 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f194f571a/ae5e3f4e89614e8fbc097a4ff27b5157 [2023-04-01 23:58:56,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:58:56,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:58:56,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:58:56,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:58:56,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:58:56,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:58:56" (1/1) ... [2023-04-01 23:58:56,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e9862f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:56, skipping insertion in model container [2023-04-01 23:58:56,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:58:56" (1/1) ... [2023-04-01 23:58:56,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:58:56,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:58:56,761 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_label41.c[1319,1332] [2023-04-01 23:58:57,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:58:57,853 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:58:57,866 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_label41.c[1319,1332] [2023-04-01 23:58:58,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:58:58,606 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:58:58,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58 WrapperNode [2023-04-01 23:58:58,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:58:58,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:58:58,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:58:58,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:58:58,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:58,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:59,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:58:59,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:58:59,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:58:59,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:58:59,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (1/1) ... [2023-04-01 23:58:59,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:58:59,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:58:59,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:58:59,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:58:59,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:58:59,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:58:59,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:58:59,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:58:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:58:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:58:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:58:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:58:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:58:59,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:58:59,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:58:59,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:58:59,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:58:59,245 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:58:59,247 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:59:06,066 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:59:06,085 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:59:06,085 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:59:06,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:59:06 BoogieIcfgContainer [2023-04-01 23:59:06,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:59:06,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:59:06,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:59:06,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:59:06,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:58:56" (1/3) ... [2023-04-01 23:59:06,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3eaac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:59:06, skipping insertion in model container [2023-04-01 23:59:06,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:58:58" (2/3) ... [2023-04-01 23:59:06,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3eaac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:59:06, skipping insertion in model container [2023-04-01 23:59:06,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:59:06" (3/3) ... [2023-04-01 23:59:06,097 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2023-04-01 23:59:06,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:59:06,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:59:06,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:59:06,210 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;@55cd5620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:59:06,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:59:06,219 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) [2023-04-01 23:59:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 23:59:06,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:06,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:06,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:06,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 972432740, now seen corresponding path program 1 times [2023-04-01 23:59:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609842115] [2023-04-01 23:59:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:59:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:06,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609842115] [2023-04-01 23:59:06,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609842115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:59:06,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:59:06,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:59:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676871380] [2023-04-01 23:59:06,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:59:06,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:59:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:59:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:59:06,745 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-01 23:59:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:21,209 INFO L93 Difference]: Finished difference Result 6479 states and 12300 transitions. [2023-04-01 23:59:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:59:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-04-01 23:59:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:59:21,244 INFO L225 Difference]: With dead ends: 6479 [2023-04-01 23:59:21,244 INFO L226 Difference]: Without dead ends: 4634 [2023-04-01 23:59:21,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:59:21,259 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 6147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 11995 mSolverCounterSat, 2910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6147 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 14905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2910 IncrementalHoareTripleChecker+Valid, 11995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:59:21,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6147 Valid, 504 Invalid, 14905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2910 Valid, 11995 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2023-04-01 23:59:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2023-04-01 23:59:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4626. [2023-04-01 23:59:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4568 states have (on average 1.6786339754816113) internal successors, (7668), 4571 states have internal predecessors, (7668), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-01 23:59:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7765 transitions. [2023-04-01 23:59:21,465 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7765 transitions. Word has length 12 [2023-04-01 23:59:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:21,466 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7765 transitions. [2023-04-01 23:59:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-01 23:59:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7765 transitions. [2023-04-01 23:59:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 23:59:21,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:21,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 23:59:21,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:59:21,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:21,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash -253642430, now seen corresponding path program 1 times [2023-04-01 23:59:21,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:21,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614577920] [2023-04-01 23:59:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:21,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:59:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614577920] [2023-04-01 23:59:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614577920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:59:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:59:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:59:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944021345] [2023-04-01 23:59:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:59:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 23:59:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 23:59:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:59:21,870 INFO L87 Difference]: Start difference. First operand 4626 states and 7765 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-04-01 23:59:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:40,876 INFO L93 Difference]: Finished difference Result 22107 states and 38124 transitions. [2023-04-01 23:59:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:59:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 85 [2023-04-01 23:59:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:59:40,979 INFO L225 Difference]: With dead ends: 22107 [2023-04-01 23:59:40,980 INFO L226 Difference]: Without dead ends: 17487 [2023-04-01 23:59:40,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:59:41,001 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 11770 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 13045 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11770 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 16945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 13045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:59:41,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11770 Valid, 781 Invalid, 16945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3900 Valid, 13045 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2023-04-01 23:59:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17487 states. [2023-04-01 23:59:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17487 to 17464. [2023-04-01 23:59:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17464 states, 17244 states have (on average 1.4197401994896777) internal successors, (24482), 17256 states have internal predecessors, (24482), 74 states have call successors, (74), 74 states have call predecessors, (74), 145 states have return successors, (764), 133 states have call predecessors, (764), 73 states have call successors, (764) [2023-04-01 23:59:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17464 states to 17464 states and 25320 transitions. [2023-04-01 23:59:41,598 INFO L78 Accepts]: Start accepts. Automaton has 17464 states and 25320 transitions. Word has length 85 [2023-04-01 23:59:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:41,599 INFO L495 AbstractCegarLoop]: Abstraction has 17464 states and 25320 transitions. [2023-04-01 23:59:41,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-04-01 23:59:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17464 states and 25320 transitions. [2023-04-01 23:59:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 23:59:41,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:41,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:59:41,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:41,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash 332845307, now seen corresponding path program 1 times [2023-04-01 23:59:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:41,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514589332] [2023-04-01 23:59:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:59:42,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514589332] [2023-04-01 23:59:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514589332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:59:42,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:59:42,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:59:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807919731] [2023-04-01 23:59:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:59:42,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:59:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:59:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:59:42,028 INFO L87 Difference]: Start difference. First operand 17464 states and 25320 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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) [2023-04-01 23:59:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:53,779 INFO L93 Difference]: Finished difference Result 52857 states and 78575 transitions. [2023-04-01 23:59:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:59:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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 116 [2023-04-01 23:59:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:59:53,890 INFO L225 Difference]: With dead ends: 52857 [2023-04-01 23:59:53,890 INFO L226 Difference]: Without dead ends: 35399 [2023-04-01 23:59:53,935 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 [2023-04-01 23:59:53,936 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 11160 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 10957 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11160 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 12765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 10957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:59:53,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11160 Valid, 1123 Invalid, 12765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 10957 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-04-01 23:59:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35399 states. [2023-04-01 23:59:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35399 to 32520. [2023-04-01 23:59:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32520 states, 31839 states have (on average 1.2758566537893778) internal successors, (40622), 31913 states have internal predecessors, (40622), 134 states have call successors, (134), 134 states have call predecessors, (134), 546 states have return successors, (3135), 472 states have call predecessors, (3135), 133 states have call successors, (3135) [2023-04-01 23:59:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32520 states to 32520 states and 43891 transitions. [2023-04-01 23:59:54,963 INFO L78 Accepts]: Start accepts. Automaton has 32520 states and 43891 transitions. Word has length 116 [2023-04-01 23:59:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:54,964 INFO L495 AbstractCegarLoop]: Abstraction has 32520 states and 43891 transitions. [2023-04-01 23:59:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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) [2023-04-01 23:59:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32520 states and 43891 transitions. [2023-04-01 23:59:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 23:59:54,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:54,968 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:59:54,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:54,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash -613297430, now seen corresponding path program 1 times [2023-04-01 23:59:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441964607] [2023-04-01 23:59:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:54,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:55,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:55,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 23:59:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:59:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441964607] [2023-04-01 23:59:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441964607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:59:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24574180] [2023-04-01 23:59:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:59:55,545 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:59:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:59:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:55,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 23:59:55,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:59:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 23:59:55,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:59:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24574180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:59:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:59:55,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 23:59:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413873828] [2023-04-01 23:59:55,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:59:55,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:59:55,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:59:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:59:55,729 INFO L87 Difference]: Start difference. First operand 32520 states and 43891 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:00:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:00:02,311 INFO L93 Difference]: Finished difference Result 95197 states and 133836 transitions. [2023-04-02 00:00:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:00:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 181 [2023-04-02 00:00:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:00:02,516 INFO L225 Difference]: With dead ends: 95197 [2023-04-02 00:00:02,516 INFO L226 Difference]: Without dead ends: 62683 [2023-04-02 00:00:02,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:00:02,586 INFO L413 NwaCegarLoop]: 1476 mSDtfsCounter, 1616 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 1752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 6028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1752 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:00:02,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 1631 Invalid, 6028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1752 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-02 00:00:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62683 states. [2023-04-02 00:00:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62683 to 59742. [2023-04-02 00:00:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59742 states, 58542 states have (on average 1.2398790611868402) internal successors, (72585), 58677 states have internal predecessors, (72585), 248 states have call successors, (248), 248 states have call predecessors, (248), 951 states have return successors, (8356), 816 states have call predecessors, (8356), 247 states have call successors, (8356) [2023-04-02 00:00:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59742 states to 59742 states and 81189 transitions. [2023-04-02 00:00:04,467 INFO L78 Accepts]: Start accepts. Automaton has 59742 states and 81189 transitions. Word has length 181 [2023-04-02 00:00:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:00:04,468 INFO L495 AbstractCegarLoop]: Abstraction has 59742 states and 81189 transitions. [2023-04-02 00:00:04,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:00:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 59742 states and 81189 transitions. [2023-04-02 00:00:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-04-02 00:00:04,482 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:00:04,483 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:04,687 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forcibly destroying the process [2023-04-02 00:00:04,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 137 [2023-04-02 00:00:04,695 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 00:00:04,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:00:04,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:00:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash -488641656, now seen corresponding path program 1 times [2023-04-02 00:00:04,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:00:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350353874] [2023-04-02 00:00:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:00:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:05,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:00:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:05,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:00:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:00:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:00:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:00:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:00:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350353874] [2023-04-02 00:00:05,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350353874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:00:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476186860] [2023-04-02 00:00:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:05,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:00:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:00:05,902 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 00:00:05,905 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 00:00:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:06,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:00:06,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:00:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 00:00:06,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:00:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476186860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:00:06,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:00:06,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 00:00:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218564155] [2023-04-02 00:00:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:00:06,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:00:06,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:00:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:00:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:00:06,261 INFO L87 Difference]: Start difference. First operand 59742 states and 81189 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:00:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:00:14,249 INFO L93 Difference]: Finished difference Result 150848 states and 211197 transitions. [2023-04-02 00:00:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:00:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 730 [2023-04-02 00:00:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:00:14,611 INFO L225 Difference]: With dead ends: 150848 [2023-04-02 00:00:14,612 INFO L226 Difference]: Without dead ends: 91112 [2023-04-02 00:00:14,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:00:14,711 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 1487 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:00:14,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3469 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 5085 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-02 00:00:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91112 states. [2023-04-02 00:00:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91112 to 88240. [2023-04-02 00:00:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88240 states, 86551 states have (on average 1.201049092442606) internal successors, (103952), 86741 states have internal predecessors, (103952), 368 states have call successors, (368), 368 states have call predecessors, (368), 1320 states have return successors, (13803), 1130 states have call predecessors, (13803), 367 states have call successors, (13803) [2023-04-02 00:00:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88240 states to 88240 states and 118123 transitions. [2023-04-02 00:00:17,252 INFO L78 Accepts]: Start accepts. Automaton has 88240 states and 118123 transitions. Word has length 730 [2023-04-02 00:00:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:00:17,255 INFO L495 AbstractCegarLoop]: Abstraction has 88240 states and 118123 transitions. [2023-04-02 00:00:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:00:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 88240 states and 118123 transitions. [2023-04-02 00:00:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2023-04-02 00:00:17,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:00:17,270 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:17,280 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 00:00:17,477 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 00:00:17,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:00:17,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:00:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1947344707, now seen corresponding path program 1 times [2023-04-02 00:00:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:00:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817375773] [2023-04-02 00:00:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:00:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:18,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:00:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:18,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:00:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:00:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2023-04-02 00:00:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2023-04-02 00:00:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 111 proven. 97 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-02 00:00:19,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:00:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817375773] [2023-04-02 00:00:19,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817375773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:00:19,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540854117] [2023-04-02 00:00:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:00:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:00:19,068 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 00:00:19,101 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 00:00:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:19,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:00:19,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:00:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 00:00:19,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:00:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 115 proven. 98 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-02 00:00:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540854117] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:00:19,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:00:19,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-04-02 00:00:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915450683] [2023-04-02 00:00:19,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:00:19,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:00:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:00:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:00:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:00:19,951 INFO L87 Difference]: Start difference. First operand 88240 states and 118123 transitions. Second operand has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 00:00:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:00:41,565 INFO L93 Difference]: Finished difference Result 253135 states and 370739 transitions. [2023-04-02 00:00:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-02 00:00:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 738 [2023-04-02 00:00:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:00:42,244 INFO L225 Difference]: With dead ends: 253135 [2023-04-02 00:00:42,244 INFO L226 Difference]: Without dead ends: 164901 [2023-04-02 00:00:42,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1509 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 00:00:42,354 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 19983 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 21550 mSolverCounterSat, 7161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19993 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 28711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7161 IncrementalHoareTripleChecker+Valid, 21550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2023-04-02 00:00:42,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19993 Valid, 1626 Invalid, 28711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7161 Valid, 21550 Invalid, 0 Unknown, 0 Unchecked, 18.7s Time] [2023-04-02 00:00:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164901 states. [2023-04-02 00:00:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164901 to 157982. [2023-04-02 00:00:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157982 states, 153595 states have (on average 1.1365213711383835) internal successors, (174564), 154364 states have internal predecessors, (174564), 644 states have call successors, (644), 644 states have call predecessors, (644), 3742 states have return successors, (32437), 2973 states have call predecessors, (32437), 643 states have call successors, (32437) [2023-04-02 00:00:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157982 states to 157982 states and 207645 transitions. [2023-04-02 00:00:46,130 INFO L78 Accepts]: Start accepts. Automaton has 157982 states and 207645 transitions. Word has length 738 [2023-04-02 00:00:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:00:46,131 INFO L495 AbstractCegarLoop]: Abstraction has 157982 states and 207645 transitions. [2023-04-02 00:00:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.75) internal successors, (921), 10 states have internal predecessors, (921), 4 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 00:00:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 157982 states and 207645 transitions. [2023-04-02 00:00:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2023-04-02 00:00:46,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:00:46,162 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:46,168 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 00:00:46,367 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 00:00:46,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:00:46,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:00:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2053672243, now seen corresponding path program 1 times [2023-04-02 00:00:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:00:46,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775887499] [2023-04-02 00:00:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:00:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:00:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:00:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:00:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:00:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:48,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:00:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:48,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-02 00:00:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 347 proven. 11 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-02 00:00:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:00:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775887499] [2023-04-02 00:00:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775887499] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:00:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219094300] [2023-04-02 00:00:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:00:48,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:00:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:00:48,239 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 00:00:48,241 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 00:00:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:00:48,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:00:48,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:00:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 522 proven. 2 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-02 00:00:48,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:00:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 207 proven. 89 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2023-04-02 00:00:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219094300] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:00:49,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:00:49,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-04-02 00:00:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182720542] [2023-04-02 00:00:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:00:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 00:00:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:00:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 00:00:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-02 00:00:49,148 INFO L87 Difference]: Start difference. First operand 157982 states and 207645 transitions. Second operand has 17 states, 17 states have (on average 54.470588235294116) internal successors, (926), 15 states have internal predecessors, (926), 6 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13)