/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:32:47,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:32:47,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:32:47,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:32:47,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:32:47,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:32:47,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:32:47,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:32:47,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:32:47,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:32:47,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:32:47,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:32:47,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:32:47,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:32:47,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:32:47,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:32:47,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:32:47,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:32:47,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:32:47,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:32:47,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:32:47,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:32:47,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:32:47,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:32:47,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:32:47,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:32:47,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:32:47,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:32:47,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:32:47,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:32:47,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:32:47,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:32:47,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:32:47,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:32:47,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:32:47,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:32:47,992 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 [2023-03-31 22:32:48,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:32:48,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:32:48,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:32:48,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:32:48,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:32:48,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:32:48,022 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:32:48,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:32:48,022 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:32:48,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:32:48,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:32:48,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:32:48,024 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:32:48,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:32:48,024 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:32:48,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:32:48,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:32:48,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:32:48,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:32:48,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:48,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:32:48,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:32:48,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:32:48,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:32:48,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:32:48,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:32:48,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:32:48,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:32:48,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:32:48,286 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:32:48,287 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:32:48,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label48.c [2023-03-31 22:32:49,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:32:49,874 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:32:49,875 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label48.c [2023-03-31 22:32:49,923 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7485a2c2/ad8a3fdfcd9f4f99b07f7031e26ddad2/FLAG63c27c5e2 [2023-03-31 22:32:49,936 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7485a2c2/ad8a3fdfcd9f4f99b07f7031e26ddad2 [2023-03-31 22:32:49,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:32:49,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:32:49,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:49,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:32:49,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:32:49,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:49" (1/1) ... [2023-03-31 22:32:49,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9b0bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:49, skipping insertion in model container [2023-03-31 22:32:49,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:49" (1/1) ... [2023-03-31 22:32:49,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:32:50,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:32:50,393 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_label48.c[8401,8414] [2023-03-31 22:32:51,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:51,417 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:32:51,449 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_label48.c[8401,8414] [2023-03-31 22:32:52,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:52,088 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:32:52,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52 WrapperNode [2023-03-31 22:32:52,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:52,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:32:52,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:32:52,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:32:52,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:32:52,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:32:52,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:32:52,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:32:52,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (1/1) ... [2023-03-31 22:32:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:32:52,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:32:52,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:32:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:32:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:32:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:32:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:32:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:32:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:32:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:32:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:32:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:32:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:32:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:32:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:32:52,773 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:32:52,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:32:59,812 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:33:13,314 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:33:13,314 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:33:13,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:13 BoogieIcfgContainer [2023-03-31 22:33:13,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:33:13,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:33:13,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:33:13,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:33:13,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:32:49" (1/3) ... [2023-03-31 22:33:13,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f5425c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:13, skipping insertion in model container [2023-03-31 22:33:13,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:52" (2/3) ... [2023-03-31 22:33:13,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f5425c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:13, skipping insertion in model container [2023-03-31 22:33:13,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:13" (3/3) ... [2023-03-31 22:33:13,324 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label48.c [2023-03-31 22:33:13,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:33:13,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:33:13,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:33:13,421 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;@3b4c65e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:33:13,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:33:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:33:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:33:13,438 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:13,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:13,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:13,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1235907043, now seen corresponding path program 1 times [2023-03-31 22:33:13,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946843885] [2023-03-31 22:33:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:13,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946843885] [2023-03-31 22:33:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946843885] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:13,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:33:13,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168129864] [2023-03-31 22:33:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:13,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:33:13,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:13,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:33:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:13,963 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 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 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) [2023-03-31 22:33:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:19,766 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:33:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:33:19,770 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 [2023-03-31 22:33:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:19,800 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:33:19,800 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:33:19,811 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 [2023-03-31 22:33:19,814 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:19,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-03-31 22:33:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:33:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:33:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:33:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-03-31 22:33:19,958 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-03-31 22:33:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:19,959 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-03-31 22:33:19,959 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) [2023-03-31 22:33:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-03-31 22:33:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:33:19,961 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:19,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:19,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:33:19,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:19,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1217105737, now seen corresponding path program 1 times [2023-03-31 22:33:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163555561] [2023-03-31 22:33:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:20,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:20,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163555561] [2023-03-31 22:33:20,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163555561] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:20,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:20,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:20,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858414067] [2023-03-31 22:33:20,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:20,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:20,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:20,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:20,163 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:28,160 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-03-31 22:33:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:33:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-31 22:33:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:28,191 INFO L225 Difference]: With dead ends: 6943 [2023-03-31 22:33:28,191 INFO L226 Difference]: Without dead ends: 4679 [2023-03-31 22:33:28,200 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 [2023-03-31 22:33:28,203 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:28,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-03-31 22:33:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-03-31 22:33:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-03-31 22:33:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-03-31 22:33:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-03-31 22:33:28,350 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-03-31 22:33:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:28,350 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-03-31 22:33:28,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-03-31 22:33:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:33:28,352 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:28,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:28,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:33:28,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:28,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1755306828, now seen corresponding path program 1 times [2023-03-31 22:33:28,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326643568] [2023-03-31 22:33:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:28,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:28,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326643568] [2023-03-31 22:33:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326643568] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:28,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:28,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928998574] [2023-03-31 22:33:28,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:28,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:28,529 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:34,863 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-03-31 22:33:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:33:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-03-31 22:33:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:34,992 INFO L225 Difference]: With dead ends: 14148 [2023-03-31 22:33:34,992 INFO L226 Difference]: Without dead ends: 9546 [2023-03-31 22:33:35,007 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 [2023-03-31 22:33:35,010 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:35,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-31 22:33:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-03-31 22:33:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-03-31 22:33:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-03-31 22:33:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-03-31 22:33:35,225 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-03-31 22:33:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-03-31 22:33:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-03-31 22:33:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:33:35,227 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:35,227 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] [2023-03-31 22:33:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:33:35,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:35,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1680511978, now seen corresponding path program 1 times [2023-03-31 22:33:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:35,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853329096] [2023-03-31 22:33:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:35,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853329096] [2023-03-31 22:33:35,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853329096] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:35,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:35,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:35,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524111233] [2023-03-31 22:33:35,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:35,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:35,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:35,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:35,376 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:42,672 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-03-31 22:33:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:33:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-03-31 22:33:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:42,731 INFO L225 Difference]: With dead ends: 26245 [2023-03-31 22:33:42,731 INFO L226 Difference]: Without dead ends: 17658 [2023-03-31 22:33:42,751 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 [2023-03-31 22:33:42,751 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:42,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-31 22:33:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-03-31 22:33:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-03-31 22:33:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-03-31 22:33:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-03-31 22:33:43,149 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-03-31 22:33:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:43,149 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-03-31 22:33:43,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-03-31 22:33:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:33:43,154 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:43,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:33:43,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:33:43,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:43,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1830468278, now seen corresponding path program 1 times [2023-03-31 22:33:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734999728] [2023-03-31 22:33:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:33:43,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:43,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734999728] [2023-03-31 22:33:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734999728] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591531528] [2023-03-31 22:33:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:43,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:33:43,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:33:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:43,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:43,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:33:43,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591531528] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:43,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:43,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:33:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711185074] [2023-03-31 22:33:43,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:43,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:43,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:33:43,591 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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)