/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:11:42,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:11:42,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:11:42,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:11:42,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:11:42,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:11:42,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:11:42,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:11:42,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:11:42,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:11:42,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:11:42,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:11:42,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:11:42,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:11:42,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:11:42,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:11:42,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:11:42,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:11:42,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:11:42,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:11:42,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:11:42,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:11:42,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:11:42,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:11:42,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:11:42,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:11:42,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:11:42,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:11:42,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:11:42,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:11:42,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:11:42,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:11:42,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:11:42,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:11:42,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:11:42,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:11:42,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:11:42,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:11:42,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:11:42,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:11:42,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:11:42,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:11:42,605 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:11:42,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:11:42,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:11:42,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:11:42,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:11:42,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:11:42,606 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:11:42,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:11:42,607 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:11:42,607 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:11:42,607 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:11:42,608 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:11:42,608 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:11:42,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:11:42,608 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:11:42,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:11:42,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:11:42,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:11:42,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:11:42,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:42,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:11:42,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:11:42,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:11:42,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:11:42,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:11:42,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:11:42,859 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:11:42,859 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:11:42,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label26.c [2023-04-01 03:11:44,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:11:44,459 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:11:44,460 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label26.c [2023-04-01 03:11:44,472 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e9986f1/317964cf88dc4758b71fa2474bcc5653/FLAG17365e333 [2023-04-01 03:11:44,486 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e9986f1/317964cf88dc4758b71fa2474bcc5653 [2023-04-01 03:11:44,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:11:44,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:11:44,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:44,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:11:44,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:11:44,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:44" (1/1) ... [2023-04-01 03:11:44,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac78503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:44, skipping insertion in model container [2023-04-01 03:11:44,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:44" (1/1) ... [2023-04-01 03:11:44,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:11:44,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:11:44,850 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/Problem01_label26.c[18357,18370] [2023-04-01 03:11:44,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:44,904 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:11:44,978 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/Problem01_label26.c[18357,18370] [2023-04-01 03:11:44,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:45,006 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:11:45,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45 WrapperNode [2023-04-01 03:11:45,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:45,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:11:45,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:11:45,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:11:45,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:11:45,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:11:45,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:11:45,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:11:45,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (1/1) ... [2023-04-01 03:11:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:45,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 03:11:45,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 03:11:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:11:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:11:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:11:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:11:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:11:45,192 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:11:45,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:11:45,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:11:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:11:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:11:45,279 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:11:45,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:11:46,137 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:11:46,339 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:11:46,339 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:11:46,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:46 BoogieIcfgContainer [2023-04-01 03:11:46,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:11:46,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:11:46,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:11:46,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:11:46,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:11:44" (1/3) ... [2023-04-01 03:11:46,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e33ab9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:46, skipping insertion in model container [2023-04-01 03:11:46,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:45" (2/3) ... [2023-04-01 03:11:46,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e33ab9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:46, skipping insertion in model container [2023-04-01 03:11:46,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:46" (3/3) ... [2023-04-01 03:11:46,349 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label26.c [2023-04-01 03:11:46,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:11:46,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:11:46,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:11:46,414 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;@68d78f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:11:46,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:11:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:11:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:11:46,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:46,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:46,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:46,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1124015235, now seen corresponding path program 1 times [2023-04-01 03:11:46,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:46,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5366288] [2023-04-01 03:11:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:47,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:47,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5366288] [2023-04-01 03:11:47,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5366288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:47,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:11:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372552986] [2023-04-01 03:11:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:47,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:47,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:11:47,112 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:11:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:47,531 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:11:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:47,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:11:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:47,550 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:11:47,551 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:11:47,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:11:47,560 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:47,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:11:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:11:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:11:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:11:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 03:11:47,626 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 03:11:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:47,626 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 03:11:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:11:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 03:11:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 03:11:47,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:47,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:47,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:11:47,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:47,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 301930397, now seen corresponding path program 1 times [2023-04-01 03:11:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295688539] [2023-04-01 03:11:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:47,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295688539] [2023-04-01 03:11:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295688539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:47,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:11:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911594214] [2023-04-01 03:11:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:47,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:11:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:11:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:11:47,958 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:11:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:48,320 INFO L93 Difference]: Finished difference Result 481 states and 860 transitions. [2023-04-01 03:11:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:11:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 03:11:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:48,324 INFO L225 Difference]: With dead ends: 481 [2023-04-01 03:11:48,324 INFO L226 Difference]: Without dead ends: 329 [2023-04-01 03:11:48,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:11:48,332 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:11:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-04-01 03:11:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2023-04-01 03:11:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 298 states have (on average 1.7315436241610738) internal successors, (516), 301 states have internal predecessors, (516), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-04-01 03:11:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 541 transitions. [2023-04-01 03:11:48,366 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 541 transitions. Word has length 87 [2023-04-01 03:11:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:48,366 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 541 transitions. [2023-04-01 03:11:48,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:11:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 541 transitions. [2023-04-01 03:11:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 03:11:48,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:48,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:11:48,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:48,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1131793297, now seen corresponding path program 1 times [2023-04-01 03:11:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288781662] [2023-04-01 03:11:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:49,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288781662] [2023-04-01 03:11:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288781662] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944924973] [2023-04-01 03:11:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:49,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:11:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:11:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:49,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:49,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:49,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:11:49,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944924973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:49,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:11:49,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:11:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747050419] [2023-04-01 03:11:49,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:11:49,553 INFO L87 Difference]: Start difference. First operand 313 states and 541 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:11:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:49,790 INFO L93 Difference]: Finished difference Result 925 states and 1643 transitions. [2023-04-01 03:11:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-04-01 03:11:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:49,796 INFO L225 Difference]: With dead ends: 925 [2023-04-01 03:11:49,796 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 03:11:49,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:11:49,799 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:11:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 03:11:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2023-04-01 03:11:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 592 states have (on average 1.4695945945945945) internal successors, (870), 597 states have internal predecessors, (870), 10 states have call successors, (10), 10 states have call predecessors, (10), 14 states have return successors, (55), 9 states have call predecessors, (55), 9 states have call successors, (55) [2023-04-01 03:11:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 935 transitions. [2023-04-01 03:11:49,839 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 935 transitions. Word has length 88 [2023-04-01 03:11:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:49,840 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 935 transitions. [2023-04-01 03:11:49,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:11:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 935 transitions. [2023-04-01 03:11:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 03:11:49,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:49,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:49,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:11:50,051 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 [2023-04-01 03:11:50,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:50,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1002383465, now seen corresponding path program 1 times [2023-04-01 03:11:50,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:50,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473150676] [2023-04-01 03:11:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:50,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:50,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473150676] [2023-04-01 03:11:50,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473150676] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363930402] [2023-04-01 03:11:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:50,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:50,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:50,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:11:50,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:11:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:50,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:50,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:50,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:11:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:50,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363930402] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:11:50,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433392518] [2023-04-01 03:11:50,600 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:11:50,600 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:11:50,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:11:50,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:11:50,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:11:50,809 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:12:14,616 WARN L223 SmtUtils]: Spent 21.15s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:12:47,330 WARN L223 SmtUtils]: Spent 20.89s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)