/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/Problem12_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:01:26,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:01:26,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:01:26,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:01:26,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:01:26,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:01:26,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:01:26,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:01:26,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:01:26,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:01:26,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:01:26,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:01:26,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:01:26,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:01:26,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:01:26,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:01:26,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:01:26,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:01:26,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:01:26,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:01:26,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:01:26,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:01:26,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:01:26,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:01:26,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:01:26,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:01:26,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:01:26,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:01:26,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:01:26,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:01:26,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:01:26,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:01:26,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:01:26,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:01:26,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:01:26,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:01:26,566 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 04:01:26,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:01:26,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:01:26,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:01:26,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:01:26,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:01:26,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:01:26,586 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:01:26,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:01:26,586 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:01:26,586 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:01:26,587 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:01:26,587 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:01:26,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:01:26,588 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:01:26,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:01:26,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:01:26,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:01:26,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:01:26,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:26,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:01:26,590 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:01:26,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:01:26,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:01:26,591 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:01:26,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:01:26,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:01:26,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:01:26,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:01:26,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:01:26,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:01:26,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:01:26,831 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:01:26,833 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:01:26,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2023-04-01 04:01:28,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:01:28,446 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:01:28,446 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2023-04-01 04:01:28,481 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bcb640a7/9cb4690bb53149b7bd1f4cc343e0acf3/FLAGb22590ad3 [2023-04-01 04:01:28,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bcb640a7/9cb4690bb53149b7bd1f4cc343e0acf3 [2023-04-01 04:01:28,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:01:28,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:01:28,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:28,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:01:28,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:01:28,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:28" (1/1) ... [2023-04-01 04:01:28,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d15518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:28, skipping insertion in model container [2023-04-01 04:01:28,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:28" (1/1) ... [2023-04-01 04:01:28,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:01:28,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:01:28,841 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label27.c[4120,4133] [2023-04-01 04:01:29,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:29,622 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:01:29,645 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label27.c[4120,4133] [2023-04-01 04:01:30,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:30,047 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:01:30,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30 WrapperNode [2023-04-01 04:01:30,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:30,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:01:30,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:01:30,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:01:30,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:01:30,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:01:30,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:01:30,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:01:30,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (1/1) ... [2023-04-01 04:01:30,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:01:30,363 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 04:01:30,387 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 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:01:30,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:01:30,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:01:30,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:01:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:01:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:01:30,493 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:01:30,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:01:34,257 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:01:34,974 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:01:34,975 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:01:34,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:34 BoogieIcfgContainer [2023-04-01 04:01:34,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:01:34,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:01:34,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:01:34,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:01:34,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:01:28" (1/3) ... [2023-04-01 04:01:34,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25838697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:34, skipping insertion in model container [2023-04-01 04:01:34,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:30" (2/3) ... [2023-04-01 04:01:34,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25838697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:34, skipping insertion in model container [2023-04-01 04:01:34,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:34" (3/3) ... [2023-04-01 04:01:34,988 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label27.c [2023-04-01 04:01:35,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:01:35,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:01:35,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:01:35,093 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;@4775e215, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:01:35,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:01:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:01:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:01:35,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:35,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:35,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:35,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 636339969, now seen corresponding path program 1 times [2023-04-01 04:01:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:35,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294227321] [2023-04-01 04:01:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:35,531 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 04:01:35,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:35,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294227321] [2023-04-01 04:01:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294227321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:35,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:35,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:01:35,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123485039] [2023-04-01 04:01:35,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:35,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:01:35,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:01:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:01:35,580 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:01:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:39,089 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:01:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:01:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:01:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:39,113 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:01:39,113 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:01:39,122 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 04:01:39,125 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:39,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:01:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:01:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:01:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:01:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-01 04:01:39,247 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-01 04:01:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:39,247 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-01 04:01:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:01:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-01 04:01:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:01:39,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:39,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:01:39,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:39,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -173839168, now seen corresponding path program 1 times [2023-04-01 04:01:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672201485] [2023-04-01 04:01:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:01:39,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:39,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672201485] [2023-04-01 04:01:39,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672201485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:39,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:39,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:01:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247633430] [2023-04-01 04:01:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:01:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:01:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:01:39,574 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:01:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:44,078 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-01 04:01:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:01:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 04:01:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:44,094 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 04:01:44,095 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 04:01:44,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:01:44,110 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:44,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 04:01:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 04:01:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-01 04:01:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 04:01:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-01 04:01:44,237 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-01 04:01:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:44,238 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-01 04:01:44,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:01:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-01 04:01:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:01:44,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:44,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:01:44,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:44,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash 489487985, now seen corresponding path program 1 times [2023-04-01 04:01:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039707233] [2023-04-01 04:01:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:01:44,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039707233] [2023-04-01 04:01:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039707233] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:44,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:44,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:01:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113262134] [2023-04-01 04:01:44,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:44,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:01:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:01:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:01:44,558 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 04:01:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:48,395 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-01 04:01:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:01:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-04-01 04:01:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:48,424 INFO L225 Difference]: With dead ends: 8417 [2023-04-01 04:01:48,424 INFO L226 Difference]: Without dead ends: 5666 [2023-04-01 04:01:48,432 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 04:01:48,433 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:48,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 04:01:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-01 04:01:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-01 04:01:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 04:01:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-01 04:01:48,576 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-01 04:01:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:48,577 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-01 04:01:48,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 04:01:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-01 04:01:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 04:01:48,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:48,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:01:48,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:48,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 372241820, now seen corresponding path program 1 times [2023-04-01 04:01:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:48,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010999535] [2023-04-01 04:01:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:01:48,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:48,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010999535] [2023-04-01 04:01:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010999535] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:01:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785093972] [2023-04-01 04:01:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:48,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:01:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:01:48,797 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 04:01:48,802 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 04:01:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:48,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:01:48,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:01:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:01:49,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:01:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785093972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:49,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:01:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:01:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138131450] [2023-04-01 04:01:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:01:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:01:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:01:49,031 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:01:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:52,826 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-01 04:01:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:01:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2023-04-01 04:01:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:52,878 INFO L225 Difference]: With dead ends: 17003 [2023-04-01 04:01:52,878 INFO L226 Difference]: Without dead ends: 11404 [2023-04-01 04:01:52,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:01:52,900 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4595 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:52,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4595 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 04:01:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-01 04:01:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-01 04:01:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3054120206690236) internal successors, (14400), 11099 states have internal predecessors, (14400), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 04:01:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15536 transitions. [2023-04-01 04:01:53,326 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15536 transitions. Word has length 74 [2023-04-01 04:01:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:53,328 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15536 transitions. [2023-04-01 04:01:53,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:01:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15536 transitions. [2023-04-01 04:01:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:01:53,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:53,336 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:01:53,347 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 04:01:53,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:01:53,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:53,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 914789941, now seen corresponding path program 1 times [2023-04-01 04:01:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170959476] [2023-04-01 04:01:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:01:53,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170959476] [2023-04-01 04:01:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170959476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:01:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011158091] [2023-04-01 04:01:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:53,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:01:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:01:53,795 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 04:01:53,796 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 04:01:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:53,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:01:53,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:01:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:01:54,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:01:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:01:54,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011158091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:01:54,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115819859] [2023-04-01 04:01:54,308 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 04:01:54,308 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:01:54,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:01:54,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:01:54,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:01:54,472 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:01:54,653 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-04-01 04:01:55,473 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 30993 conjuctions. This might take some time... [2023-04-01 04:01:57,324 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 569 conjuctions. [2023-04-01 04:02:08,279 WARN L223 SmtUtils]: Spent 6.54s on a formula simplification that was a NOOP. DAG size: 716 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)