/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:11:36,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:11:36,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:11:36,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:11:36,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:11:36,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:11:36,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:11:36,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:11:36,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:11:36,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:11:36,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:11:36,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:11:36,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:11:36,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:11:36,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:11:36,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:11:36,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:11:36,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:11:36,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:11:36,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:11:36,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:11:36,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:11:36,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:11:36,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:11:36,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:11:36,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:11:36,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:11:36,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:11:36,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:11:36,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:11:36,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:11:36,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:11:36,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:11:36,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:11:36,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:11:36,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:11:36,604 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 03:11:36,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:11:36,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:11:36,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:11:36,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:11:36,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:11:36,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:11:36,641 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:11:36,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:11:36,641 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:11:36,642 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:11:36,642 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:11:36,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:11:36,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:11:36,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:11:36,644 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:11:36,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:11:36,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:11:36,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:11:36,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:11:36,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:11:36,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:11:36,645 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:11:36,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:11:36,646 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:11:36,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:11:36,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:11:36,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:11:36,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:36,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:11:36,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:11:36,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:11:36,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:11:36,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:11:36,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:11:36,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:11:36,954 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:11:36,954 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:11:36,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2023-04-01 03:11:38,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:11:38,508 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:11:38,519 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2023-04-01 03:11:38,531 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce300ce91/efde585c97db4946879f6a36b5f8e00d/FLAG7d228e616 [2023-04-01 03:11:38,545 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce300ce91/efde585c97db4946879f6a36b5f8e00d [2023-04-01 03:11:38,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:11:38,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:11:38,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:38,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:11:38,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:11:38,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:38" (1/1) ... [2023-04-01 03:11:38,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208d5643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:38, skipping insertion in model container [2023-04-01 03:11:38,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:38" (1/1) ... [2023-04-01 03:11:38,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:11:38,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:11:38,889 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_label24.c[17735,17748] [2023-04-01 03:11:38,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:38,951 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:11:39,051 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_label24.c[17735,17748] [2023-04-01 03:11:39,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:39,082 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:11:39,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39 WrapperNode [2023-04-01 03:11:39,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:39,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:11:39,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:11:39,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:11:39,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:11:39,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:11:39,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:11:39,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:11:39,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (1/1) ... [2023-04-01 03:11:39,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:39,246 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 03:11:39,271 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 03:11:39,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:11:39,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:11:39,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:11:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:11:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:11:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:11:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:11:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:11:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:11:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:11:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:11:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:11:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:11:39,367 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:11:39,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:11:40,346 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:11:40,570 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:11:40,571 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:11:40,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:40 BoogieIcfgContainer [2023-04-01 03:11:40,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:11:40,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:11:40,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:11:40,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:11:40,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:11:38" (1/3) ... [2023-04-01 03:11:40,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c910b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:40, skipping insertion in model container [2023-04-01 03:11:40,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:39" (2/3) ... [2023-04-01 03:11:40,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c910b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:40, skipping insertion in model container [2023-04-01 03:11:40,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:40" (3/3) ... [2023-04-01 03:11:40,582 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label24.c [2023-04-01 03:11:40,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:11:40,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:11:40,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:11:40,653 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;@77d91dd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:11:40,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:11:40,658 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 03:11:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:11:40,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:40,670 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 03:11:40,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:40,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2062138142, now seen corresponding path program 1 times [2023-04-01 03:11:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:40,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007635368] [2023-04-01 03:11:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:41,361 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 03:11:41,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007635368] [2023-04-01 03:11:41,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007635368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:41,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:11:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635015328] [2023-04-01 03:11:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:41,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:41,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:11:41,416 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 03:11:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:41,835 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:11:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:41,837 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 03:11:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:41,853 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:11:41,853 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:11:41,857 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 03:11:41,862 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 03:11:41,863 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 03:11:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:11:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:11:41,934 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 03:11:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 03:11:41,945 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 03:11:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 03:11:41,946 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 03:11:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 03:11:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 03:11:41,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:41,950 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 03:11:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:11:41,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:41,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1470125372, now seen corresponding path program 1 times [2023-04-01 03:11:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:41,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653505509] [2023-04-01 03:11:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:42,214 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 03:11:42,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:42,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653505509] [2023-04-01 03:11:42,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653505509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:42,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:42,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:11:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5738766] [2023-04-01 03:11:42,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:11:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:11:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:11:42,220 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 03:11:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:42,644 INFO L93 Difference]: Finished difference Result 481 states and 860 transitions. [2023-04-01 03:11:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:11:42,645 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 03:11:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:42,649 INFO L225 Difference]: With dead ends: 481 [2023-04-01 03:11:42,649 INFO L226 Difference]: Without dead ends: 329 [2023-04-01 03:11:42,650 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 03:11:42,651 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:42,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:11:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-04-01 03:11:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2023-04-01 03:11:42,676 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 03:11:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 541 transitions. [2023-04-01 03:11:42,678 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 541 transitions. Word has length 87 [2023-04-01 03:11:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:42,679 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 541 transitions. [2023-04-01 03:11:42,679 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 03:11:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 541 transitions. [2023-04-01 03:11:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 03:11:42,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:42,682 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 03:11:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:11:42,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:42,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1308829742, now seen corresponding path program 1 times [2023-04-01 03:11:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:42,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091612072] [2023-04-01 03:11:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:43,390 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 03:11:43,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091612072] [2023-04-01 03:11:43,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091612072] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104989064] [2023-04-01 03:11:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:43,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:43,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:43,397 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 03:11:43,405 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 03:11:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:43,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:43,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:43,783 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 03:11:43,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:11:43,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104989064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:43,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:11:43,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:11:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136626653] [2023-04-01 03:11:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:11:43,786 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 03:11:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:44,053 INFO L93 Difference]: Finished difference Result 771 states and 1353 transitions. [2023-04-01 03:11:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:44,054 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 03:11:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:44,058 INFO L225 Difference]: With dead ends: 771 [2023-04-01 03:11:44,058 INFO L226 Difference]: Without dead ends: 463 [2023-04-01 03:11:44,059 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 03:11:44,062 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:44,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:11:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-01 03:11:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2023-04-01 03:11:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 444 states have (on average 1.6261261261261262) internal successors, (722), 447 states have internal predecessors, (722), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (37), 7 states have call predecessors, (37), 7 states have call successors, (37) [2023-04-01 03:11:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 767 transitions. [2023-04-01 03:11:44,102 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 767 transitions. Word has length 88 [2023-04-01 03:11:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:44,102 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 767 transitions. [2023-04-01 03:11:44,102 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 03:11:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 767 transitions. [2023-04-01 03:11:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 03:11:44,105 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:44,106 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:44,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:11:44,315 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 03:11:44,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:44,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1481862218, now seen corresponding path program 1 times [2023-04-01 03:11:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272536716] [2023-04-01 03:11:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:44,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:44,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272536716] [2023-04-01 03:11:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272536716] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:44,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:11:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611043861] [2023-04-01 03:11:44,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:11:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:11:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:11:44,652 INFO L87 Difference]: Start difference. First operand 463 states and 767 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:11:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:45,120 INFO L93 Difference]: Finished difference Result 1435 states and 2461 transitions. [2023-04-01 03:11:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:11:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 92 [2023-04-01 03:11:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:45,127 INFO L225 Difference]: With dead ends: 1435 [2023-04-01 03:11:45,127 INFO L226 Difference]: Without dead ends: 977 [2023-04-01 03:11:45,129 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 03:11:45,130 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:45,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 44 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:11:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-04-01 03:11:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 961. [2023-04-01 03:11:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 906 states have (on average 1.4150110375275937) internal successors, (1282), 933 states have internal predecessors, (1282), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (138), 13 states have call predecessors, (138), 13 states have call successors, (138) [2023-04-01 03:11:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1434 transitions. [2023-04-01 03:11:45,184 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1434 transitions. Word has length 92 [2023-04-01 03:11:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:45,185 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1434 transitions. [2023-04-01 03:11:45,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:11:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1434 transitions. [2023-04-01 03:11:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:11:45,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:45,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-04-01 03:11:45,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:11:45,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:45,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:45,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1574033454, now seen corresponding path program 1 times [2023-04-01 03:11:45,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645954866] [2023-04-01 03:11:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:45,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:45,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645954866] [2023-04-01 03:11:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645954866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:45,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015326547] [2023-04-01 03:11:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:45,366 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 03:11:45,381 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 03:11:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:45,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:45,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:45,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:11:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015326547] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:11:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592217142] [2023-04-01 03:11:45,703 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:11:45,703 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:11:45,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:11:45,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:11:45,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:11:46,060 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:12:10,378 WARN L223 SmtUtils]: Spent 20.90s 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 03:12:42,764 WARN L223 SmtUtils]: Spent 19.93s 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)