/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/Problem12_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:01:04,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:01:04,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:01:04,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:01:04,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:01:04,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:01:04,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:01:04,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:01:04,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:01:04,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:01:04,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:01:04,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:01:04,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:01:04,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:01:04,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:01:04,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:01:04,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:01:04,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:01:04,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:01:04,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:01:04,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:01:04,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:01:04,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:01:04,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:01:04,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:01:04,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:01:04,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:01:04,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:01:04,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:01:04,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:01:04,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:01:04,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:01:04,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:01:04,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:01:04,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:01:04,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:01:04,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:01:04,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:01:04,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:01:04,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:01:04,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:01:04,544 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 22:01:04,563 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:01:04,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:01:04,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:01:04,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:01:04,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:01:04,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:01:04,570 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:01:04,570 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:01:04,570 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:01:04,570 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:01:04,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:01:04,571 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:01:04,572 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:01:04,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:01:04,572 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:01:04,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:01:04,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:01:04,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:01:04,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:01:04,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:01:04,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:01:04,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:01:04,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:04,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:01:04,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:01:04,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:01:04,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:01:04,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:01:04,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:01:04,840 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:01:04,840 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:01:04,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-03-31 22:01:05,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:01:06,384 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:01:06,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-03-31 22:01:06,414 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a8e20db/db9e00da30c44a01b32b5e074c173d18/FLAG9187660d3 [2023-03-31 22:01:06,429 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a8e20db/db9e00da30c44a01b32b5e074c173d18 [2023-03-31 22:01:06,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:01:06,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:01:06,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:06,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:01:06,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:01:06,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:06" (1/1) ... [2023-03-31 22:01:06,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650d360d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:06, skipping insertion in model container [2023-03-31 22:01:06,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:06" (1/1) ... [2023-03-31 22:01:06,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:01:06,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:01:06,728 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_label49.c[5366,5379] [2023-03-31 22:01:07,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:07,496 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:01:07,520 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_label49.c[5366,5379] [2023-03-31 22:01:07,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:07,867 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:01:07,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07 WrapperNode [2023-03-31 22:01:07,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:07,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:01:07,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:01:07,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:01:07,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:07,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:07,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:07,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:01:08,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:01:08,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:01:08,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:01:08,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (1/1) ... [2023-03-31 22:01:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:08,138 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 22:01:08,158 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 22:01:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:01:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:01:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:01:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:01:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:01:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:01:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:01:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:01:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:01:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:01:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:01:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:01:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:01:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:01:08,271 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:01:08,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:01:12,093 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:01:12,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:01:12,753 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:01:12,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:12 BoogieIcfgContainer [2023-03-31 22:01:12,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:01:12,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:01:12,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:01:12,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:01:12,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:01:06" (1/3) ... [2023-03-31 22:01:12,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db6c0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:12, skipping insertion in model container [2023-03-31 22:01:12,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:07" (2/3) ... [2023-03-31 22:01:12,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db6c0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:12, skipping insertion in model container [2023-03-31 22:01:12,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:12" (3/3) ... [2023-03-31 22:01:12,766 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label49.c [2023-03-31 22:01:12,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:01:12,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:01:12,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:01:12,855 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;@69b2ca24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:01:12,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:01:12,864 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) [2023-03-31 22:01:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:01:12,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:12,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:12,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:12,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 636342785, now seen corresponding path program 1 times [2023-03-31 22:01:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253240426] [2023-03-31 22:01:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:13,224 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 22:01:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253240426] [2023-03-31 22:01:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253240426] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:01:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929374773] [2023-03-31 22:01:13,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:13,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:01:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:01:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:13,262 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) [2023-03-31 22:01:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:16,506 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:01:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:01:16,508 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 22:01:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:16,529 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:01:16,529 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:01:16,535 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 22:01:16,538 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:16,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:01:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:01:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 22:01:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 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) [2023-03-31 22:01:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-03-31 22:01:16,654 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-03-31 22:01:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:16,654 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-03-31 22:01:16,654 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 22:01:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-03-31 22:01:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:01:16,656 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:16,656 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] [2023-03-31 22:01:16,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:01:16,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:16,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1390100588, now seen corresponding path program 1 times [2023-03-31 22:01:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297903731] [2023-03-31 22:01:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:16,863 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 22:01:16,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297903731] [2023-03-31 22:01:16,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297903731] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:16,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:16,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619857247] [2023-03-31 22:01:16,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:16,868 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 22:01:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:20,814 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-03-31 22:01:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-03-31 22:01:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:20,832 INFO L225 Difference]: With dead ends: 4138 [2023-03-31 22:01:20,833 INFO L226 Difference]: Without dead ends: 2775 [2023-03-31 22:01:20,843 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 22:01:20,846 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:20,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 22:01:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-03-31 22:01:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-03-31 22:01:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-03-31 22:01:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-03-31 22:01:20,947 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-03-31 22:01:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:20,948 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-03-31 22:01:20,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 22:01:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-03-31 22:01:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 22:01:20,949 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:20,949 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] [2023-03-31 22:01:20,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:01:20,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:20,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1138093339, now seen corresponding path program 1 times [2023-03-31 22:01:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:20,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484849133] [2023-03-31 22:01:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:20,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:21,095 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 22:01:21,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:21,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484849133] [2023-03-31 22:01:21,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484849133] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:21,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:21,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370461738] [2023-03-31 22:01:21,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:21,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:21,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:21,097 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:01:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:25,053 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-03-31 22:01:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-03-31 22:01:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:25,098 INFO L225 Difference]: With dead ends: 7729 [2023-03-31 22:01:25,098 INFO L226 Difference]: Without dead ends: 4977 [2023-03-31 22:01:25,108 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 22:01:25,112 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:25,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 22:01:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-03-31 22:01:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-03-31 22:01:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-03-31 22:01:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-03-31 22:01:25,279 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-03-31 22:01:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:25,280 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-03-31 22:01:25,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:01:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-03-31 22:01:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:01:25,282 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:25,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:01:25,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:25,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -269261181, now seen corresponding path program 1 times [2023-03-31 22:01:25,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:25,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49107849] [2023-03-31 22:01:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:25,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49107849] [2023-03-31 22:01:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49107849] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383693419] [2023-03-31 22:01:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:25,573 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 22:01:25,661 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 22:01:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:25,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:01:25,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:25,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383693419] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:01:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416640949] [2023-03-31 22:01:25,968 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 22:01:25,968 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:01:25,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:01:25,974 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:01:25,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:01:26,197 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 22:01:26,377 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-03-31 22:01:26,586 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-03-31 22:01:27,196 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:01:27,320 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-03-31 22:01:28,788 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-03-31 22:01:29,556 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 56800 conjuctions. This might take some time... [2023-03-31 22:01:38,982 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2368 conjuctions. [2023-03-31 22:01:51,639 WARN L223 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 419 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)