/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:03:24,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:03:24,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:03:24,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:03:24,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:03:24,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:03:24,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:03:24,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:03:24,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:03:24,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:03:24,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:03:24,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:03:24,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:03:24,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:03:24,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:03:24,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:03:24,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:03:24,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:03:24,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:03:24,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:03:24,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:03:24,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:03:24,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:03:24,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:03:24,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:03:24,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:03:24,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:03:24,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:03:24,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:03:24,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:03:24,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:03:24,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:03:24,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:03:24,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:03:24,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:03:24,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:03:24,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:03:24,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:03:24,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:03:24,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:03:24,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:03:24,699 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 04:03:24,718 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:03:24,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:03:24,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:03:24,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:03:24,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:03:24,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:03:24,720 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:03:24,720 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:03:24,720 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:03:24,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:03:24,720 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:03:24,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:03:24,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:03:24,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:03:24,721 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:03:24,721 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:03:24,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:03:24,722 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:03:24,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:03:24,722 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:03:24,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:03:24,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:03:24,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:03:24,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:03:24,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:03:24,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:03:24,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:03:24,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:24,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:03:24,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:03:24,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:03:24,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:03:24,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:03:24,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:03:24,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:03:24,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:03:24,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:03:24,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:03:24,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:03:24,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:03:24,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:03:24,980 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:03:24,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label54.c [2023-04-01 04:03:26,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:03:26,646 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:03:26,647 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label54.c [2023-04-01 04:03:26,681 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/689b7cbe9/89d0d3d4f8794dbe9e1dabaa437d23cc/FLAG3426c330d [2023-04-01 04:03:26,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/689b7cbe9/89d0d3d4f8794dbe9e1dabaa437d23cc [2023-04-01 04:03:26,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:03:26,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:03:26,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:26,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:03:26,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:03:26,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:26" (1/1) ... [2023-04-01 04:03:26,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32aacf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:26, skipping insertion in model container [2023-04-01 04:03:26,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:26" (1/1) ... [2023-04-01 04:03:26,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:26,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:27,103 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_label54.c[4370,4383] [2023-04-01 04:03:27,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:27,859 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:27,889 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/Problem12_label54.c[4370,4383] [2023-04-01 04:03:28,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:28,307 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:28,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28 WrapperNode [2023-04-01 04:03:28,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:28,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:28,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:28,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:28,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:28,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:28,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:28,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:28,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (1/1) ... [2023-04-01 04:03:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:28,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:28,626 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 04:03:28,634 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 04:03:28,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:28,764 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:28,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:03:32,691 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:03:33,259 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:03:33,260 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:03:33,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:33 BoogieIcfgContainer [2023-04-01 04:03:33,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:03:33,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:03:33,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:03:33,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:03:33,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:03:26" (1/3) ... [2023-04-01 04:03:33,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e255974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:33, skipping insertion in model container [2023-04-01 04:03:33,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:28" (2/3) ... [2023-04-01 04:03:33,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e255974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:33, skipping insertion in model container [2023-04-01 04:03:33,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:33" (3/3) ... [2023-04-01 04:03:33,271 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label54.c [2023-04-01 04:03:33,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:03:33,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:03:33,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:03:33,352 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;@1b9e2130, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:03:33,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:03:33,359 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 04:03:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:03:33,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:33,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:33,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:33,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash 832853986, now seen corresponding path program 1 times [2023-04-01 04:03:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260645137] [2023-04-01 04:03:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:33,725 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 04:03:33,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260645137] [2023-04-01 04:03:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260645137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:33,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:03:33,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007970158] [2023-04-01 04:03:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:03:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:03:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:03:33,771 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 04:03:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:37,348 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:03:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:03:37,355 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 04:03:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:37,379 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:03:37,379 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:03:37,386 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 04:03:37,389 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:37,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:03:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:03:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:03:37,512 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 04:03:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-01 04:03:37,525 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-01 04:03:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:37,526 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-01 04:03:37,527 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 04:03:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-01 04:03:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:03:37,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:37,530 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 04:03:37,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:03:37,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:37,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1565682961, now seen corresponding path program 1 times [2023-04-01 04:03:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:37,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743241484] [2023-04-01 04:03:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:37,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:37,817 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 04:03:37,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:37,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743241484] [2023-04-01 04:03:37,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743241484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:37,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:37,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580343934] [2023-04-01 04:03:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:37,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:37,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:37,821 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 04:03:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:42,263 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-01 04:03:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:03:42,266 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 04:03:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:42,283 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 04:03:42,284 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 04:03:42,289 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 04:03:42,290 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, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:42,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 04:03:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 04:03:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-01 04:03:42,380 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 04:03:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-01 04:03:42,393 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-01 04:03:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:42,394 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-01 04:03:42,394 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 04:03:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-01 04:03:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:03:42,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:42,396 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 04:03:42,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:42,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:42,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1160318912, now seen corresponding path program 1 times [2023-04-01 04:03:42,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:42,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50507684] [2023-04-01 04:03:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:42,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:42,593 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 04:03:42,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:42,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50507684] [2023-04-01 04:03:42,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50507684] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:42,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:42,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:42,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953529435] [2023-04-01 04:03:42,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:42,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:42,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:42,596 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 04:03:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:46,550 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-01 04:03:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:46,551 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 04:03:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:46,583 INFO L225 Difference]: With dead ends: 8417 [2023-04-01 04:03:46,583 INFO L226 Difference]: Without dead ends: 5666 [2023-04-01 04:03:46,594 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 04:03:46,597 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:46,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:03:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-01 04:03:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-01 04:03:46,754 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 04:03:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-01 04:03:46,773 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-01 04:03:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:46,774 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-01 04:03:46,774 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 04:03:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-01 04:03:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 04:03:46,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:46,777 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 04:03:46,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:03:46,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:46,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1820902757, now seen corresponding path program 1 times [2023-04-01 04:03:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:46,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465704283] [2023-04-01 04:03:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:47,045 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 04:03:47,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465704283] [2023-04-01 04:03:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465704283] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805146912] [2023-04-01 04:03:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:47,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:47,053 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 04:03:47,057 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 04:03:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:47,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:03:47,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:47,304 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 04:03:47,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:03:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805146912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:47,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:03:47,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:03:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421440494] [2023-04-01 04:03:47,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:47,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:03:47,307 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 04:03:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:51,195 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-01 04:03:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:51,197 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 04:03:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:51,253 INFO L225 Difference]: With dead ends: 17003 [2023-04-01 04:03:51,253 INFO L226 Difference]: Without dead ends: 11404 [2023-04-01 04:03:51,273 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 04:03:51,279 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2205 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:51,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 93 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:03:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-01 04:03:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-01 04:03:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 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 04:03:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-04-01 04:03:51,639 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-04-01 04:03:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:51,641 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-04-01 04:03:51,642 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 04:03:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-04-01 04:03:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:03:51,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:51,644 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 04:03:51,657 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 04:03:51,857 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 04:03:51,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:51,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1721279164, now seen corresponding path program 1 times [2023-04-01 04:03:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580833083] [2023-04-01 04:03:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:52,084 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 04:03:52,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:52,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580833083] [2023-04-01 04:03:52,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580833083] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:52,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686435650] [2023-04-01 04:03:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:52,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:52,091 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 04:03:52,093 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 04:03:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:52,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:52,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:52,348 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 04:03:52,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:52,587 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 04:03:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686435650] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350314632] [2023-04-01 04:03:52,610 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 04:03:52,611 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:52,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:52,618 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:52,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:52,767 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:03:52,922 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2023-04-01 04:03:54,167 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 50349 conjuctions. This might take some time... [2023-04-01 04:03:57,747 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 609 conjuctions. [2023-04-01 04:04:07,012 WARN L223 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 638 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)