/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:34:54,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:34:54,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:34:54,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:34:54,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:34:54,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:34:54,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:34:54,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:34:54,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:34:54,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:34:54,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:34:54,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:34:54,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:34:54,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:34:54,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:34:54,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:34:54,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:34:54,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:34:54,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:34:54,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:34:54,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:34:54,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:34:54,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:34:54,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:34:54,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:34:54,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:34:54,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:34:54,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:34:54,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:34:54,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:34:54,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:34:54,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:34:54,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:34:54,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:34:54,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:34:54,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:34:54,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:34:54,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:34:54,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:34:54,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:34:54,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:34:54,746 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 10:34:54,768 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:34:54,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:34:54,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:34:54,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:34:54,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:34:54,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:34:54,769 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:34:54,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:34:54,770 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:34:54,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:34:54,770 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:34:54,770 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:34:54,770 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:34:54,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:34:54,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:34:54,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:34:54,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:34:54,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:34:54,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:34:54,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:34:54,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:34:54,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:34:54,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:34:54,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:34:54,976 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:34:54,976 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:34:54,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label24.c [2023-04-01 10:34:56,026 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:34:56,575 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:34:56,576 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label24.c [2023-04-01 10:34:56,618 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c575f0be/a7eaec224c334f00b9e59ac26a1075a5/FLAG640e5561e [2023-04-01 10:34:56,630 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c575f0be/a7eaec224c334f00b9e59ac26a1075a5 [2023-04-01 10:34:56,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:34:56,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:34:56,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:34:56,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:34:56,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:34:56,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:34:56" (1/1) ... [2023-04-01 10:34:56,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3069e382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:56, skipping insertion in model container [2023-04-01 10:34:56,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:34:56" (1/1) ... [2023-04-01 10:34:56,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:34:56,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:34:57,040 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/Problem19_label24.c[6032,6045] [2023-04-01 10:34:57,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:34:57,962 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:34:57,987 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/Problem19_label24.c[6032,6045] [2023-04-01 10:34:58,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:34:58,538 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:34:58,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58 WrapperNode [2023-04-01 10:34:58,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:34:58,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:34:58,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:34:58,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:34:58,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:34:58,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:34:58,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:34:58,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:34:58,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (1/1) ... [2023-04-01 10:34:58,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:34:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:34:58,960 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 10:34:58,981 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 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:34:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:34:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:34:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:34:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:34:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:34:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:34:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:34:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:34:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:34:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:34:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:34:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:34:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:34:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:34:59,081 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:34:59,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:35:05,085 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:35:19,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:35:19,877 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:35:19,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:19 BoogieIcfgContainer [2023-04-01 10:35:19,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:35:19,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:35:19,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:35:19,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:35:19,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:34:56" (1/3) ... [2023-04-01 10:35:19,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e31c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:19, skipping insertion in model container [2023-04-01 10:35:19,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:58" (2/3) ... [2023-04-01 10:35:19,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e31c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:19, skipping insertion in model container [2023-04-01 10:35:19,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:19" (3/3) ... [2023-04-01 10:35:19,887 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2023-04-01 10:35:19,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:35:19,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:35:19,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:35:19,954 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;@53d3154a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:35:19,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:35:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:35:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:35:19,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:19,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:19,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:19,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1235901923, now seen corresponding path program 1 times [2023-04-01 10:35:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:19,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258386652] [2023-04-01 10:35:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:20,320 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 10:35:20,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258386652] [2023-04-01 10:35:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258386652] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:20,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:35:20,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695134726] [2023-04-01 10:35:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:20,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:35:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:35:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:35:20,370 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 10:35:27,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:35:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:27,968 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:35:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:35:27,975 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 10:35:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:27,998 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:35:27,998 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:35:28,003 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 10:35:28,006 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1159 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 937 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:28,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 156 Invalid, 4819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3881 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 10:35:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:35:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2229. [2023-04-01 10:35:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2203 states have (on average 1.9450748978665455) internal successors, (4285), 2203 states have internal predecessors, (4285), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:35:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4320 transitions. [2023-04-01 10:35:28,116 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4320 transitions. Word has length 11 [2023-04-01 10:35:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:28,117 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4320 transitions. [2023-04-01 10:35:28,117 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 10:35:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4320 transitions. [2023-04-01 10:35:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:35:28,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:28,119 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 10:35:28,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:35:28,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:28,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1908253710, now seen corresponding path program 1 times [2023-04-01 10:35:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218316880] [2023-04-01 10:35:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:28,288 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 10:35:28,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:28,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218316880] [2023-04-01 10:35:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218316880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:28,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984142294] [2023-04-01 10:35:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:28,291 INFO L87 Difference]: Start difference. First operand 2229 states and 4320 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 10:35:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:35,181 INFO L93 Difference]: Finished difference Result 6761 states and 13161 transitions. [2023-04-01 10:35:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:35,181 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 10:35:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:35,198 INFO L225 Difference]: With dead ends: 6761 [2023-04-01 10:35:35,198 INFO L226 Difference]: Without dead ends: 4537 [2023-04-01 10:35:35,201 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 10:35:35,202 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3858 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:35,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 143 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 10:35:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2023-04-01 10:35:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4490. [2023-04-01 10:35:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4427 states have (on average 1.8599503049469166) internal successors, (8234), 4431 states have internal predecessors, (8234), 23 states have call successors, (23), 23 states have call predecessors, (23), 39 states have return successors, (116), 35 states have call predecessors, (116), 22 states have call successors, (116) [2023-04-01 10:35:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 8373 transitions. [2023-04-01 10:35:35,297 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 8373 transitions. Word has length 25 [2023-04-01 10:35:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:35,298 INFO L495 AbstractCegarLoop]: Abstraction has 4490 states and 8373 transitions. [2023-04-01 10:35:35,298 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 10:35:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 8373 transitions. [2023-04-01 10:35:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:35:35,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:35,298 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] [2023-04-01 10:35:35,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:35:35,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:35,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1871090858, now seen corresponding path program 1 times [2023-04-01 10:35:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330399193] [2023-04-01 10:35:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:35,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:35,396 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 10:35:35,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:35,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330399193] [2023-04-01 10:35:35,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330399193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617862703] [2023-04-01 10:35:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:35,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:35,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:35,402 INFO L87 Difference]: Start difference. First operand 4490 states and 8373 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 10:35:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:41,830 INFO L93 Difference]: Finished difference Result 12484 states and 23499 transitions. [2023-04-01 10:35:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 10:35:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:41,867 INFO L225 Difference]: With dead ends: 12484 [2023-04-01 10:35:41,867 INFO L226 Difference]: Without dead ends: 7999 [2023-04-01 10:35:41,874 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 10:35:41,876 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3880 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:41,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3880 Valid, 147 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 10:35:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2023-04-01 10:35:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7941. [2023-04-01 10:35:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7809 states have (on average 1.7496478422333206) internal successors, (13663), 7821 states have internal predecessors, (13663), 38 states have call successors, (38), 38 states have call predecessors, (38), 93 states have return successors, (414), 81 states have call predecessors, (414), 37 states have call successors, (414) [2023-04-01 10:35:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 14115 transitions. [2023-04-01 10:35:42,054 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 14115 transitions. Word has length 28 [2023-04-01 10:35:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:42,055 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 14115 transitions. [2023-04-01 10:35:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 10:35:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 14115 transitions. [2023-04-01 10:35:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:35:42,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:42,056 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] [2023-04-01 10:35:42,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:35:42,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:42,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:42,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1921891066, now seen corresponding path program 1 times [2023-04-01 10:35:42,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:42,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10832399] [2023-04-01 10:35:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:42,171 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 10:35:42,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:42,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10832399] [2023-04-01 10:35:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10832399] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:42,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:42,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700016801] [2023-04-01 10:35:42,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:42,173 INFO L87 Difference]: Start difference. First operand 7941 states and 14115 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:35:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:50,250 INFO L93 Difference]: Finished difference Result 23274 states and 42279 transitions. [2023-04-01 10:35:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 10:35:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:50,296 INFO L225 Difference]: With dead ends: 23274 [2023-04-01 10:35:50,297 INFO L226 Difference]: Without dead ends: 15338 [2023-04-01 10:35:50,312 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 10:35:50,313 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3796 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6874 mSolverCounterSat, 1738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3796 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1738 IncrementalHoareTripleChecker+Valid, 6874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:50,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3796 Valid, 181 Invalid, 8612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1738 Valid, 6874 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-04-01 10:35:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15338 states. [2023-04-01 10:35:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15338 to 15003. [2023-04-01 10:35:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 14651 states have (on average 1.5081564398334584) internal successors, (22096), 14701 states have internal predecessors, (22096), 68 states have call successors, (68), 68 states have call predecessors, (68), 283 states have return successors, (1704), 233 states have call predecessors, (1704), 67 states have call successors, (1704) [2023-04-01 10:35:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 23868 transitions. [2023-04-01 10:35:50,763 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 23868 transitions. Word has length 29 [2023-04-01 10:35:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:50,764 INFO L495 AbstractCegarLoop]: Abstraction has 15003 states and 23868 transitions. [2023-04-01 10:35:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:35:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 23868 transitions. [2023-04-01 10:35:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:35:50,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:50,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:35:50,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:35:50,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:50,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1589082751, now seen corresponding path program 1 times [2023-04-01 10:35:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717695416] [2023-04-01 10:35:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:35:50,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717695416] [2023-04-01 10:35:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717695416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:35:50,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042697941] [2023-04-01 10:35:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:50,969 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 10:35:50,996 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 10:35:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:51,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:35:51,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:35:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:35:51,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:35:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042697941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:51,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:35:51,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 10:35:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204768135] [2023-04-01 10:35:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:35:51,124 INFO L87 Difference]: Start difference. First operand 15003 states and 23868 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 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)