/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:18:59,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:18:59,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:18:59,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:18:59,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:18:59,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:18:59,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:18:59,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:18:59,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:18:59,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:18:59,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:18:59,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:18:59,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:18:59,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:18:59,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:18:59,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:18:59,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:18:59,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:18:59,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:18:59,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:18:59,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:18:59,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:18:59,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:18:59,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:18:59,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:18:59,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:18:59,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:18:59,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:18:59,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:18:59,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:18:59,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:18:59,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:18:59,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:18:59,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:18:59,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:18:59,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:18:59,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:18:59,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:18:59,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:18:59,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:18:59,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:18:59,932 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 [2023-03-31 22:18:59,951 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:18:59,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:18:59,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:18:59,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:18:59,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:18:59,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:18:59,952 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:18:59,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:18:59,953 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:18:59,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:18:59,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:18:59,954 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:18:59,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:18:59,955 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:18:59,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:18:59,956 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:18:59,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:18:59,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:18:59,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:18:59,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:18:59,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:18:59,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:18:59,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:19:00,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:19:00,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:19:00,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:19:00,220 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:19:00,221 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:19:00,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label52.c [2023-03-31 22:19:01,313 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:19:01,637 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:19:01,637 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label52.c [2023-03-31 22:19:01,659 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5cabbbf/b5e46d7ec987431f8e710d067cecdabc/FLAG9fc747d08 [2023-03-31 22:19:01,674 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5cabbbf/b5e46d7ec987431f8e710d067cecdabc [2023-03-31 22:19:01,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:19:01,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:19:01,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:19:01,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:19:01,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:19:01,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:19:01" (1/1) ... [2023-03-31 22:19:01,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32917922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:01, skipping insertion in model container [2023-03-31 22:19:01,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:19:01" (1/1) ... [2023-03-31 22:19:01,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:19:01,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:19:01,949 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/Problem16_label52.c[3233,3246] [2023-03-31 22:19:02,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:19:02,304 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:19:02,327 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/Problem16_label52.c[3233,3246] [2023-03-31 22:19:02,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:19:02,527 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:19:02,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02 WrapperNode [2023-03-31 22:19:02,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:19:02,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:19:02,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:19:02,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:19:02,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,665 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:19:02,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:19:02,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:19:02,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:19:02,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (1/1) ... [2023-03-31 22:19:02,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:19:02,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:19:02,718 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) [2023-03-31 22:19:02,743 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 [2023-03-31 22:19:02,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:19:02,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:19:02,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:19:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:19:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:19:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:19:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:19:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:19:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:19:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:19:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:19:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:19:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:19:02,846 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:19:02,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:19:04,726 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:19:05,837 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:19:05,838 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:19:05,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:19:05 BoogieIcfgContainer [2023-03-31 22:19:05,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:19:05,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:19:05,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:19:05,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:19:05,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:19:01" (1/3) ... [2023-03-31 22:19:05,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a0ae3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:19:05, skipping insertion in model container [2023-03-31 22:19:05,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:19:02" (2/3) ... [2023-03-31 22:19:05,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a0ae3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:19:05, skipping insertion in model container [2023-03-31 22:19:05,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:19:05" (3/3) ... [2023-03-31 22:19:05,851 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label52.c [2023-03-31 22:19:05,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:19:05,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:19:05,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:19:05,933 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;@2fce28a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:19:05,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:19:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:19:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:19:05,946 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:05,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:05,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:05,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash -510224057, now seen corresponding path program 1 times [2023-03-31 22:19:05,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:05,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144930547] [2023-03-31 22:19:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:05,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:19:06,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144930547] [2023-03-31 22:19:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144930547] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:19:06,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:19:06,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:19:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451162127] [2023-03-31 22:19:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:19:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:19:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:19:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:19:06,331 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-03-31 22:19:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:07,572 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:19:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:19:07,574 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 [2023-03-31 22:19:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:07,586 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:19:07,587 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:19:07,591 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 [2023-03-31 22:19:07,594 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 272 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:07,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 63 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:19:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:19:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2023-03-31 22:19:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 445 states have (on average 1.901123595505618) internal successors, (846), 445 states have internal predecessors, (846), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:19:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2023-03-31 22:19:07,681 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2023-03-31 22:19:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:07,682 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2023-03-31 22:19:07,682 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) [2023-03-31 22:19:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2023-03-31 22:19:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:19:07,685 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:07,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:19:07,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:07,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1150998384, now seen corresponding path program 1 times [2023-03-31 22:19:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:07,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132627591] [2023-03-31 22:19:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:19:07,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132627591] [2023-03-31 22:19:07,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132627591] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:19:07,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:19:07,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:19:07,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894883123] [2023-03-31 22:19:07,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:19:07,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:19:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:19:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:19:07,909 INFO L87 Difference]: Start difference. First operand 455 states and 857 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) [2023-03-31 22:19:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:09,237 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2023-03-31 22:19:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:19:09,241 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 [2023-03-31 22:19:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:09,247 INFO L225 Difference]: With dead ends: 1369 [2023-03-31 22:19:09,247 INFO L226 Difference]: Without dead ends: 919 [2023-03-31 22:19:09,248 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 [2023-03-31 22:19:09,250 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 876 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:09,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 43 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:19:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-03-31 22:19:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2023-03-31 22:19:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 862 states have (on average 1.78538283062645) internal successors, (1539), 865 states have internal predecessors, (1539), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-03-31 22:19:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2023-03-31 22:19:09,286 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2023-03-31 22:19:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:09,287 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2023-03-31 22:19:09,287 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) [2023-03-31 22:19:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2023-03-31 22:19:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-03-31 22:19:09,288 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:09,288 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] [2023-03-31 22:19:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:19:09,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:09,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2146499217, now seen corresponding path program 1 times [2023-03-31 22:19:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477120506] [2023-03-31 22:19:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:19:09,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:09,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477120506] [2023-03-31 22:19:09,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477120506] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:19:09,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:19:09,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:19:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395480813] [2023-03-31 22:19:09,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:19:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:19:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:19:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:19:09,457 INFO L87 Difference]: Start difference. First operand 879 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2023-03-31 22:19:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:10,834 INFO L93 Difference]: Finished difference Result 2430 states and 4393 transitions. [2023-03-31 22:19:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:19:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 50 [2023-03-31 22:19:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:10,844 INFO L225 Difference]: With dead ends: 2430 [2023-03-31 22:19:10,844 INFO L226 Difference]: Without dead ends: 1556 [2023-03-31 22:19:10,846 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 [2023-03-31 22:19:10,847 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 940 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:10,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:19:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-03-31 22:19:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1540. [2023-03-31 22:19:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1510 states have (on average 1.4933774834437086) internal successors, (2255), 1518 states have internal predecessors, (2255), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (61), 10 states have call predecessors, (61), 10 states have call successors, (61) [2023-03-31 22:19:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2327 transitions. [2023-03-31 22:19:10,911 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2327 transitions. Word has length 50 [2023-03-31 22:19:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:10,911 INFO L495 AbstractCegarLoop]: Abstraction has 1540 states and 2327 transitions. [2023-03-31 22:19:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2023-03-31 22:19:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2327 transitions. [2023-03-31 22:19:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 22:19:10,914 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:10,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:10,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:19:10,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:10,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1470089505, now seen corresponding path program 1 times [2023-03-31 22:19:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546726032] [2023-03-31 22:19:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:19:11,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546726032] [2023-03-31 22:19:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546726032] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:19:11,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582541983] [2023-03-31 22:19:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:19:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:19:11,161 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) [2023-03-31 22:19:11,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:19:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:11,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:19:11,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:19:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:19:11,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:19:11,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582541983] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:19:11,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:19:11,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:19:11,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294369264] [2023-03-31 22:19:11,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:19:11,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:19:11,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:19:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:19:11,369 INFO L87 Difference]: Start difference. First operand 1540 states and 2327 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:19:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:12,593 INFO L93 Difference]: Finished difference Result 3304 states and 4993 transitions. [2023-03-31 22:19:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:19:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 91 [2023-03-31 22:19:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:12,601 INFO L225 Difference]: With dead ends: 3304 [2023-03-31 22:19:12,601 INFO L226 Difference]: Without dead ends: 1769 [2023-03-31 22:19:12,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:19:12,605 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:12,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:19:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2023-03-31 22:19:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1764. [2023-03-31 22:19:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1733 states have (on average 1.4529717253317946) internal successors, (2518), 1740 states have internal predecessors, (2518), 12 states have call successors, (12), 12 states have call predecessors, (12), 18 states have return successors, (67), 11 states have call predecessors, (67), 11 states have call successors, (67) [2023-03-31 22:19:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2597 transitions. [2023-03-31 22:19:12,650 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2597 transitions. Word has length 91 [2023-03-31 22:19:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:12,651 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2597 transitions. [2023-03-31 22:19:12,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:19:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2597 transitions. [2023-03-31 22:19:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-03-31 22:19:12,655 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:12,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:12,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:19:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:19:12,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:12,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1909573092, now seen corresponding path program 1 times [2023-03-31 22:19:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:12,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995151830] [2023-03-31 22:19:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:19:13,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995151830] [2023-03-31 22:19:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995151830] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:19:13,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:19:13,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:19:13,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090617783] [2023-03-31 22:19:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:19:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:19:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:19:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:19:13,270 INFO L87 Difference]: Start difference. First operand 1764 states and 2597 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-03-31 22:19:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:14,664 INFO L93 Difference]: Finished difference Result 4251 states and 6254 transitions. [2023-03-31 22:19:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:19:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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 175 [2023-03-31 22:19:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:14,677 INFO L225 Difference]: With dead ends: 4251 [2023-03-31 22:19:14,678 INFO L226 Difference]: Without dead ends: 2492 [2023-03-31 22:19:14,682 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 [2023-03-31 22:19:14,686 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 488 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:14,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 49 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:19:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2023-03-31 22:19:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2450. [2023-03-31 22:19:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2400 states have (on average 1.3895833333333334) internal successors, (3335), 2420 states have internal predecessors, (3335), 15 states have call successors, (15), 15 states have call predecessors, (15), 34 states have return successors, (139), 14 states have call predecessors, (139), 14 states have call successors, (139) [2023-03-31 22:19:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3489 transitions. [2023-03-31 22:19:14,760 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3489 transitions. Word has length 175 [2023-03-31 22:19:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:14,761 INFO L495 AbstractCegarLoop]: Abstraction has 2450 states and 3489 transitions. [2023-03-31 22:19:14,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-03-31 22:19:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3489 transitions. [2023-03-31 22:19:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-03-31 22:19:14,765 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:14,766 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:19:14,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:14,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2043583027, now seen corresponding path program 1 times [2023-03-31 22:19:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:14,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060789261] [2023-03-31 22:19:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 22:19:15,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:19:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060789261] [2023-03-31 22:19:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060789261] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:19:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354792343] [2023-03-31 22:19:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:19:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:19:15,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:19:15,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:19:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:19:15,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:19:15,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:19:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:19:15,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:19:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 22:19:15,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354792343] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:19:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625043571] [2023-03-31 22:19:15,638 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:19:15,638 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:19:15,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:19:15,645 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:19:15,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:19:15,761 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:19:15,905 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-03-31 22:19:16,083 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-03-31 22:19:17,128 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:19:17,190 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-03-31 22:19:18,509 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-03-31 22:19:22,757 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 96822 conjuctions. This might take some time... [2023-03-31 22:19:39,257 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1474 conjuctions.