/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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:28:37,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:28:37,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:28:37,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:28:37,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:28:37,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:28:37,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:28:37,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:28:37,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:28:37,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:28:37,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:28:37,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:28:37,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:28:37,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:28:37,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:28:37,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:28:37,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:28:37,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:28:37,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:28:37,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:28:37,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:28:37,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:28:37,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:28:37,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:28:37,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:28:37,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:28:37,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:28:37,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:28:37,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:28:37,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:28:37,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:28:37,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:28:37,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:28:37,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:28:37,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:28:37,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:28:37,769 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 04:28:37,808 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:28:37,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:28:37,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:28:37,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:28:37,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:28:37,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:28:37,809 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:28:37,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:28:37,810 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:28:37,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:28:37,810 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:28:37,811 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:28:37,811 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:28:37,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:28:37,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:28:37,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:28:37,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:37,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:28:37,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:28:37,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:28:38,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:28:38,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:28:38,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:28:38,034 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:28:38,035 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:28:38,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label50.c [2023-04-01 04:28:39,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:28:39,351 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:28:39,352 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label50.c [2023-04-01 04:28:39,364 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335701d58/e897cb67da73454b8aa8183ad931c285/FLAG1a72eec0c [2023-04-01 04:28:39,606 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335701d58/e897cb67da73454b8aa8183ad931c285 [2023-04-01 04:28:39,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:28:39,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:28:39,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:39,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:28:39,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:28:39,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:39" (1/1) ... [2023-04-01 04:28:39,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46911179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:39, skipping insertion in model container [2023-04-01 04:28:39,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:39" (1/1) ... [2023-04-01 04:28:39,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:28:39,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:28:39,821 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/Problem18_label50.c[6561,6574] [2023-04-01 04:28:40,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:40,300 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:28:40,313 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/Problem18_label50.c[6561,6574] [2023-04-01 04:28:40,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:40,513 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:28:40,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40 WrapperNode [2023-04-01 04:28:40,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:40,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:28:40,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:28:40,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:28:40,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:28:40,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:28:40,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:28:40,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:28:40,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (1/1) ... [2023-04-01 04:28:40,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:40,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:40,667 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 04:28:40,680 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 04:28:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:28:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:28:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:28:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:28:40,742 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:28:40,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:28:43,412 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:28:49,821 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:28:49,821 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:28:49,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:49 BoogieIcfgContainer [2023-04-01 04:28:49,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:28:49,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:28:49,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:28:49,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:28:49,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:28:39" (1/3) ... [2023-04-01 04:28:49,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea9668e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:49, skipping insertion in model container [2023-04-01 04:28:49,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:40" (2/3) ... [2023-04-01 04:28:49,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea9668e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:49, skipping insertion in model container [2023-04-01 04:28:49,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:49" (3/3) ... [2023-04-01 04:28:49,829 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2023-04-01 04:28:49,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:28:49,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:28:49,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:28:49,905 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;@4ec80c8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:28:49,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:28:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:28:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:28:49,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:49,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:49,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:49,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 314329955, now seen corresponding path program 1 times [2023-04-01 04:28:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:49,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744998984] [2023-04-01 04:28:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:50,232 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 04:28:50,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:50,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744998984] [2023-04-01 04:28:50,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744998984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:50,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:50,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136155161] [2023-04-01 04:28:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:50,257 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:28:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:51,955 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:28:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:51,956 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 04:28:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:51,969 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:28:51,969 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:28:51,974 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 04:28:51,976 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:51,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:28:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:28:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:28:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:28:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 04:28:52,035 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 04:28:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:52,036 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 04:28:52,036 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 04:28:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 04:28:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:28:52,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:52,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:52,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:28:52,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:52,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 517352681, now seen corresponding path program 1 times [2023-04-01 04:28:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580911122] [2023-04-01 04:28:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:52,136 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 04:28:52,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580911122] [2023-04-01 04:28:52,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580911122] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:52,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:28:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956036148] [2023-04-01 04:28:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:28:52,139 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:28:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:54,574 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 04:28:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:28:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:28:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:54,583 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 04:28:54,583 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 04:28:54,604 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 04:28:54,608 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:54,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:28:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 04:28:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 04:28:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:28:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 04:28:54,705 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 04:28:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:54,705 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 04:28:54,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:28:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 04:28:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:28:54,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:54,729 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] [2023-04-01 04:28:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:28:54,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:54,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1202699041, now seen corresponding path program 1 times [2023-04-01 04:28:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:54,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791446340] [2023-04-01 04:28:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:54,949 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 04:28:54,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:54,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791446340] [2023-04-01 04:28:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791446340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:54,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:28:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323717961] [2023-04-01 04:28:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:28:54,951 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:28:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:56,662 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 04:28:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:28:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:28:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:56,692 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 04:28:56,692 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 04:28:56,698 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 04:28:56,701 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:28:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 04:28:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 04:28:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 04:28:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 04:28:56,814 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 04:28:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:56,815 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 04:28:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:28:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 04:28:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 04:28:56,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:56,818 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] [2023-04-01 04:28:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:28:56,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:56,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1517817258, now seen corresponding path program 1 times [2023-04-01 04:28:56,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:56,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004901128] [2023-04-01 04:28:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:56,988 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 04:28:56,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004901128] [2023-04-01 04:28:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004901128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:56,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397252706] [2023-04-01 04:28:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:56,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:56,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:56,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:56,989 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:28:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:58,711 INFO L93 Difference]: Finished difference Result 9134 states and 12952 transitions. [2023-04-01 04:28:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-01 04:28:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:58,757 INFO L225 Difference]: With dead ends: 9134 [2023-04-01 04:28:58,757 INFO L226 Difference]: Without dead ends: 5932 [2023-04-01 04:28:58,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:28:58,774 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:58,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 838 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:28:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2023-04-01 04:28:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5792. [2023-04-01 04:28:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5701 states have (on average 1.278196807577618) internal successors, (7287), 5722 states have internal predecessors, (7287), 29 states have call successors, (29), 29 states have call predecessors, (29), 61 states have return successors, (355), 40 states have call predecessors, (355), 28 states have call successors, (355) [2023-04-01 04:28:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 7671 transitions. [2023-04-01 04:28:58,890 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 7671 transitions. Word has length 58 [2023-04-01 04:28:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:58,890 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 7671 transitions. [2023-04-01 04:28:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:28:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 7671 transitions. [2023-04-01 04:28:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:28:58,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:58,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 04:28:58,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:28:58,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:58,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1232590315, now seen corresponding path program 1 times [2023-04-01 04:28:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182603866] [2023-04-01 04:28:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:59,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182603866] [2023-04-01 04:28:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182603866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:28:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349517802] [2023-04-01 04:28:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:59,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:28:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:59,011 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 04:28:59,012 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 04:28:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:59,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:28:59,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:28:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:59,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:28:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:59,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349517802] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:28:59,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595408873] [2023-04-01 04:28:59,461 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 04:28:59,462 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:28:59,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:28:59,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:28:59,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:28:59,587 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:28:59,746 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2023-04-01 04:29:16,852 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 136154 conjuctions. This might take some time... [2023-04-01 04:29:27,861 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 462 conjuctions. [2023-04-01 04:29:29,688 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 12328 conjuctions. This might take some time... [2023-04-01 04:29:32,377 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 3216 conjuctions.