/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:04:24,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:04:24,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:04:24,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:04:24,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:04:24,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:04:24,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:04:24,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:04:24,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:04:24,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:04:24,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:04:24,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:04:24,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:04:24,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:04:24,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:04:24,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:04:24,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:04:24,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:04:24,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:04:24,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:04:24,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:04:24,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:04:24,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:04:24,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:04:24,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:04:24,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:04:24,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:04:24,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:04:24,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:04:24,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:04:24,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:04:24,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:04:24,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:04:24,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:04:24,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:04:24,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:04:24,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:04:24,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:04:24,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:04:24,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:04:24,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:04:24,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:04:24,088 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:04:24,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:04:24,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:04:24,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:04:24,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:04:24,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:04:24,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:04:24,091 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:04:24,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:04:24,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:04:24,091 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:04:24,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:04:24,091 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:04:24,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:04:24,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:04:24,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:04:24,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:04:24,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:04:24,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:04:24,096 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:04:24,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:04:24,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:04:24,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:04:24,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:04:24,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:04:24,319 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:04:24,320 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:04:24,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2023-04-01 10:04:25,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:04:25,659 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:04:25,660 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2023-04-01 10:04:25,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeae461e6/ec7aa1aab0b94d009f8b7fd592f0824a/FLAG117692222 [2023-04-01 10:04:25,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeae461e6/ec7aa1aab0b94d009f8b7fd592f0824a [2023-04-01 10:04:25,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:04:25,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:04:25,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:04:25,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:04:25,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:04:25,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:04:25" (1/1) ... [2023-04-01 10:04:25,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382c8156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:25, skipping insertion in model container [2023-04-01 10:04:25,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:04:25" (1/1) ... [2023-04-01 10:04:25,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:04:25,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:04:25,982 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/Problem12_label30.c[3429,3442] [2023-04-01 10:04:26,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:04:26,524 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:04:26,544 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/Problem12_label30.c[3429,3442] [2023-04-01 10:04:26,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:04:26,854 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:04:26,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26 WrapperNode [2023-04-01 10:04:26,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:04:26,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:04:26,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:04:26,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:04:26,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:26,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:26,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:26,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:26,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:26,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:27,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:27,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:27,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:04:27,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:04:27,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:04:27,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:04:27,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (1/1) ... [2023-04-01 10:04:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:04:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:27,098 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 10:04:27,113 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 10:04:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:04:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:04:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:04:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:04:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:04:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:04:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:04:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:04:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:04:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:04:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:04:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:04:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:04:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:04:27,227 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:04:27,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:04:30,212 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:04:30,711 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:04:30,711 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:04:30,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:04:30 BoogieIcfgContainer [2023-04-01 10:04:30,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:04:30,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:04:30,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:04:30,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:04:30,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:04:25" (1/3) ... [2023-04-01 10:04:30,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6595d367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:04:30, skipping insertion in model container [2023-04-01 10:04:30,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:26" (2/3) ... [2023-04-01 10:04:30,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6595d367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:04:30, skipping insertion in model container [2023-04-01 10:04:30,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:04:30" (3/3) ... [2023-04-01 10:04:30,724 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2023-04-01 10:04:30,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:04:30,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:04:30,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:04:30,802 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=FINITE_AUTOMATA, 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;@78112a32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:04:30,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:04:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:04:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:04:30,814 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:30,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:30,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:30,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash 832851938, now seen corresponding path program 1 times [2023-04-01 10:04:30,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38747130] [2023-04-01 10:04:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:31,088 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 10:04:31,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:31,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38747130] [2023-04-01 10:04:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38747130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:31,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:31,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:04:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280505962] [2023-04-01 10:04:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:31,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:04:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:04:31,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:04:31,129 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 10:04:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:33,998 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:04:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:04:34,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2023-04-01 10:04:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:34,015 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:04:34,015 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:04:34,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:04:34,024 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:34,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 10:04:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:04:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:04:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:04:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-01 10:04:34,111 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-01 10:04:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:34,111 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-01 10:04:34,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 10:04:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-01 10:04:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:04:34,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:34,113 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] [2023-04-01 10:04:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:04:34,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:34,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1142702767, now seen corresponding path program 1 times [2023-04-01 10:04:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694126107] [2023-04-01 10:04:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:34,335 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 10:04:34,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:34,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694126107] [2023-04-01 10:04:34,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694126107] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:34,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:34,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:04:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064917453] [2023-04-01 10:04:34,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:34,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:04:34,338 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:04:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:37,944 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-01 10:04:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:04:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:04:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:37,957 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:04:37,958 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:04:37,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:04:37,968 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:37,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:04:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:04:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-01 10:04:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 10:04:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-01 10:04:38,048 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-01 10:04:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:38,048 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-01 10:04:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:04:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-01 10:04:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 10:04:38,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:38,051 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] [2023-04-01 10:04:38,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:04:38,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:38,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1650562944, now seen corresponding path program 1 times [2023-04-01 10:04:38,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:38,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457807677] [2023-04-01 10:04:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:38,251 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 10:04:38,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457807677] [2023-04-01 10:04:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457807677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:38,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:38,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:04:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241926443] [2023-04-01 10:04:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:38,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:04:38,253 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 10:04:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:41,547 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-01 10:04:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:04:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-04-01 10:04:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:41,574 INFO L225 Difference]: With dead ends: 8417 [2023-04-01 10:04:41,574 INFO L226 Difference]: Without dead ends: 5666 [2023-04-01 10:04:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:41,584 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:41,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:04:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-01 10:04:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-01 10:04:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 10:04:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-01 10:04:41,699 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-01 10:04:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:41,700 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-01 10:04:41,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 10:04:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-01 10:04:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 10:04:41,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:41,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:04:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:04:41,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:41,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2111141221, now seen corresponding path program 1 times [2023-04-01 10:04:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088568320] [2023-04-01 10:04:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:04:41,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:41,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088568320] [2023-04-01 10:04:41,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088568320] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:41,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750415700] [2023-04-01 10:04:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:41,930 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 10:04:41,931 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 10:04:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:42,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:04:42,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:42,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:04:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750415700] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:42,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:04:42,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:04:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635870784] [2023-04-01 10:04:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:42,186 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-04-01 10:04:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:45,831 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-01 10:04:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:04:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 74 [2023-04-01 10:04:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:45,868 INFO L225 Difference]: With dead ends: 17003 [2023-04-01 10:04:45,869 INFO L226 Difference]: Without dead ends: 11404 [2023-04-01 10:04:45,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:04:45,880 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4595 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:45,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4595 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:04:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-01 10:04:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-01 10:04:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3054120206690236) internal successors, (14400), 11099 states have internal predecessors, (14400), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 10:04:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15536 transitions. [2023-04-01 10:04:46,069 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15536 transitions. Word has length 74 [2023-04-01 10:04:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:46,070 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15536 transitions. [2023-04-01 10:04:46,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-04-01 10:04:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15536 transitions. [2023-04-01 10:04:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:04:46,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:46,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:04:46,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:04:46,278 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 [2023-04-01 10:04:46,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:46,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1774529796, now seen corresponding path program 1 times [2023-04-01 10:04:46,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:46,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957440693] [2023-04-01 10:04:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:46,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:46,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957440693] [2023-04-01 10:04:46,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957440693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:46,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380419413] [2023-04-01 10:04:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:46,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:04:46,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:04:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:46,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:04:46,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:46,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:04:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380419413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:04:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986683824] [2023-04-01 10:04:46,853 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:04:46,853 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:04:46,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:04:46,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:04:46,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:04:47,152 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:04:47,300 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2023-04-01 10:04:51,727 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42