/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/Problem16_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:17:39,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:17:39,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:17:39,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:17:39,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:17:39,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:17:39,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:17:39,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:17:39,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:17:39,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:17:39,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:17:39,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:17:39,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:17:39,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:17:39,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:17:39,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:17:39,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:17:39,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:17:39,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:17:39,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:17:39,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:17:39,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:17:39,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:17:39,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:17:39,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:17:39,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:17:39,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:17:39,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:17:39,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:17:39,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:17:39,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:17:39,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:17:39,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:17:39,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:17:39,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:17:39,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:17:39,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:17:39,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:17:39,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:17:39,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:17:39,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:17:39,459 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 22:17:39,488 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:17:39,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:17:39,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:17:39,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:17:39,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:17:39,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:17:39,490 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:17:39,490 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:17:39,490 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:17:39,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:17:39,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:17:39,491 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:17:39,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:17:39,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:17:39,492 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:17:39,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:17:39,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:17:39,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:17:39,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:17:39,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:39,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:17:39,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:17:39,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:17:39,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:17:39,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:17:39,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:17:39,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:17:39,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:17:39,762 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:17:39,762 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:17:39,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label36.c [2023-03-31 22:17:40,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:17:41,284 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:17:41,285 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label36.c [2023-03-31 22:17:41,303 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35235a32e/cd38bc75ea0f41e9bf54fdbddb017bc1/FLAG0345d030e [2023-03-31 22:17:41,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35235a32e/cd38bc75ea0f41e9bf54fdbddb017bc1 [2023-03-31 22:17:41,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:17:41,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:17:41,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:41,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:17:41,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:17:41,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:41" (1/1) ... [2023-03-31 22:17:41,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe6df5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:41, skipping insertion in model container [2023-03-31 22:17:41,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:41" (1/1) ... [2023-03-31 22:17:41,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:17:41,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:17:41,601 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/Problem16_label36.c[3906,3919] [2023-03-31 22:17:41,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:41,968 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:17:41,985 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/Problem16_label36.c[3906,3919] [2023-03-31 22:17:42,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:42,138 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:17:42,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42 WrapperNode [2023-03-31 22:17:42,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:42,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:17:42,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:17:42,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:17:42,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:17:42,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:17:42,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:17:42,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:17:42,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (1/1) ... [2023-03-31 22:17:42,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:42,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:42,345 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 22:17:42,365 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 22:17:42,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:17:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:17:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:17:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:17:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:17:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:17:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:17:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:17:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:17:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:17:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:17:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:17:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:17:42,472 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:17:42,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:17:44,309 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:17:45,474 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:17:45,475 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:17:45,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:45 BoogieIcfgContainer [2023-03-31 22:17:45,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:17:45,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:17:45,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:17:45,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:17:45,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:17:41" (1/3) ... [2023-03-31 22:17:45,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1bff59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:45, skipping insertion in model container [2023-03-31 22:17:45,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:42" (2/3) ... [2023-03-31 22:17:45,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1bff59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:45, skipping insertion in model container [2023-03-31 22:17:45,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:45" (3/3) ... [2023-03-31 22:17:45,488 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2023-03-31 22:17:45,503 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:17:45,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:17:45,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:17:45,567 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;@3d321745, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:17:45,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:17:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:17:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:17:45,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:45,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:45,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:45,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash -706735770, now seen corresponding path program 1 times [2023-03-31 22:17:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799805362] [2023-03-31 22:17:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:45,950 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 22:17:45,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799805362] [2023-03-31 22:17:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799805362] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:45,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512553241] [2023-03-31 22:17:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:45,994 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 22:17:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:47,287 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:17:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:47,290 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 22:17:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:47,302 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:17:47,302 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:17:47,307 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 22:17:47,309 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:47,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:17:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:17:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-03-31 22:17:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:17:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-03-31 22:17:47,367 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-03-31 22:17:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:47,367 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-03-31 22:17:47,368 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 22:17:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-03-31 22:17:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:17:47,370 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:47,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:17:47,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:47,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1212752939, now seen corresponding path program 1 times [2023-03-31 22:17:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:47,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91420701] [2023-03-31 22:17:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:47,672 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 22:17:47,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:47,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91420701] [2023-03-31 22:17:47,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91420701] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:47,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:47,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:47,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812161256] [2023-03-31 22:17:47,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:47,676 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:17:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:49,115 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-03-31 22:17:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:17:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:49,126 INFO L225 Difference]: With dead ends: 1405 [2023-03-31 22:17:49,126 INFO L226 Difference]: Without dead ends: 943 [2023-03-31 22:17:49,130 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 22:17:49,131 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:49,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:17:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-03-31 22:17:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-03-31 22:17:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-03-31 22:17:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-03-31 22:17:49,175 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-03-31 22:17:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:49,176 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-03-31 22:17:49,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:17:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-03-31 22:17:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:17:49,179 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:49,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:17:49,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:49,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -929595552, now seen corresponding path program 1 times [2023-03-31 22:17:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388519352] [2023-03-31 22:17:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:17:49,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388519352] [2023-03-31 22:17:49,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388519352] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644411159] [2023-03-31 22:17:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:49,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:49,517 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 22:17:49,527 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 22:17:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:49,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:17:49,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:49,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:17:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644411159] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:49,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:17:49,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:17:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776268732] [2023-03-31 22:17:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:17:49,861 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:17:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:51,385 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-03-31 22:17:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 115 [2023-03-31 22:17:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:51,395 INFO L225 Difference]: With dead ends: 1907 [2023-03-31 22:17:51,395 INFO L226 Difference]: Without dead ends: 1198 [2023-03-31 22:17:51,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:17:51,400 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:51,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:17:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-03-31 22:17:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-03-31 22:17:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-03-31 22:17:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-03-31 22:17:51,453 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-03-31 22:17:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:51,455 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-03-31 22:17:51,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:17:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-03-31 22:17:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 22:17:51,467 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:51,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:51,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:17:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:51,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:51,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -60146983, now seen corresponding path program 1 times [2023-03-31 22:17:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:51,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67374242] [2023-03-31 22:17:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:51,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:51,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67374242] [2023-03-31 22:17:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67374242] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685467290] [2023-03-31 22:17:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:51,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:51,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:51,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:17:51,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:17:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:52,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:52,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:52,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:17:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:52,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685467290] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:17:52,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753973794] [2023-03-31 22:17:52,519 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:17:52,520 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:17:52,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:17:52,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:17:52,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:17:52,634 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:17:52,767 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-03-31 22:17:52,963 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-03-31 22:17:53,814 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:17:53,920 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-03-31 22:17:55,235 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-03-31 22:17:56,349 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 51150 conjuctions. This might take some time... [2023-03-31 22:18:03,534 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1364 conjuctions.