/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/Problem19_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:33:01,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:33:01,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:33:02,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:33:02,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:33:02,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:33:02,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:33:02,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:33:02,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:33:02,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:33:02,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:33:02,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:33:02,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:33:02,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:33:02,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:33:02,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:33:02,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:33:02,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:33:02,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:33:02,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:33:02,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:33:02,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:33:02,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:33:02,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:33:02,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:33:02,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:33:02,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:33:02,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:33:02,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:33:02,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:33:02,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:33:02,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:33:02,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:33:02,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:33:02,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:33:02,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:33:02,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:33:02,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:33:02,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:33:02,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:33:02,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:33:02,091 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 22:33:02,122 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:33:02,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:33:02,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:33:02,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:33:02,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:33:02,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:33:02,124 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:33:02,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:33:02,124 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:33:02,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:33:02,125 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:33:02,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:33:02,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:33:02,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:33:02,125 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:33:02,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:33:02,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:33:02,126 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:33:02,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:33:02,126 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:33:02,127 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:33:02,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:33:02,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:33:02,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:33:02,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:33:02,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:33:02,128 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:33:02,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:33:02,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:33:02,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:33:02,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:33:02,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:33:02,394 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:33:02,394 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:33:02,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-03-31 22:33:03,492 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:33:04,063 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:33:04,064 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-03-31 22:33:04,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/376318c6e/163dfc4801e448e5a2df15e4722f8be0/FLAG137468cd1 [2023-03-31 22:33:04,127 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/376318c6e/163dfc4801e448e5a2df15e4722f8be0 [2023-03-31 22:33:04,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:33:04,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:33:04,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:33:04,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:33:04,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:33:04,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:33:04" (1/1) ... [2023-03-31 22:33:04,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfc5053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:04, skipping insertion in model container [2023-03-31 22:33:04,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:33:04" (1/1) ... [2023-03-31 22:33:04,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:33:04,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:33:04,635 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_label52.c[7226,7239] [2023-03-31 22:33:05,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:33:05,820 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:33:05,851 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_label52.c[7226,7239] [2023-03-31 22:33:06,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:33:06,631 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:33:06,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06 WrapperNode [2023-03-31 22:33:06,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:33:06,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:33:06,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:33:06,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:33:06,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:06,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:06,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:06,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:06,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:06,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:07,009 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:07,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:07,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:33:07,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:33:07,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:33:07,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:33:07,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (1/1) ... [2023-03-31 22:33:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:33:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:07,201 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 22:33:07,221 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 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:33:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:33:07,243 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:33:07,243 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:33:07,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:33:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:33:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:33:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:33:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:33:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:33:07,327 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:33:07,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:33:14,717 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:33:28,694 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:33:28,694 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:33:28,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:28 BoogieIcfgContainer [2023-03-31 22:33:28,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:33:28,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:33:28,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:33:28,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:33:28,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:33:04" (1/3) ... [2023-03-31 22:33:28,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbde78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:28, skipping insertion in model container [2023-03-31 22:33:28,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:06" (2/3) ... [2023-03-31 22:33:28,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbde78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:28, skipping insertion in model container [2023-03-31 22:33:28,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:28" (3/3) ... [2023-03-31 22:33:28,708 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2023-03-31 22:33:28,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:33:28,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:33:28,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:33:28,817 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;@715b83a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:33:28,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:33:28,827 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) [2023-03-31 22:33:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:33:28,834 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:28,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:28,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:28,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1235904483, now seen corresponding path program 1 times [2023-03-31 22:33:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:28,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187922639] [2023-03-31 22:33:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:29,173 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 22:33:29,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187922639] [2023-03-31 22:33:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187922639] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:29,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:29,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:33:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563057936] [2023-03-31 22:33:29,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:33:29,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:33:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:29,215 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) [2023-03-31 22:33:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:35,586 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:33:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:33:35,589 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 22:33:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:35,617 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:33:35,617 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:33:35,627 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 22:33:35,630 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1292 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:35,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 239 Invalid, 5087 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1820 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-31 22:33:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:33:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2265. [2023-03-31 22:33:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2239 states have (on average 1.9004019651630193) internal successors, (4255), 2239 states have internal predecessors, (4255), 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) [2023-03-31 22:33:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 4290 transitions. [2023-03-31 22:33:35,766 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 4290 transitions. Word has length 11 [2023-03-31 22:33:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:35,766 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 4290 transitions. [2023-03-31 22:33:35,767 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 22:33:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 4290 transitions. [2023-03-31 22:33:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:33:35,769 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:35,769 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] [2023-03-31 22:33:35,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:33:35,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:35,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1832761621, now seen corresponding path program 1 times [2023-03-31 22:33:35,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074743424] [2023-03-31 22:33:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:36,177 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 22:33:36,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:36,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074743424] [2023-03-31 22:33:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074743424] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:36,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:36,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648199573] [2023-03-31 22:33:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:36,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:36,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:36,183 INFO L87 Difference]: Start difference. First operand 2265 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 22:33:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:45,615 INFO L93 Difference]: Finished difference Result 6873 states and 13056 transitions. [2023-03-31 22:33:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:33:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 47 [2023-03-31 22:33:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:45,636 INFO L225 Difference]: With dead ends: 6873 [2023-03-31 22:33:45,636 INFO L226 Difference]: Without dead ends: 4613 [2023-03-31 22:33:45,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:33:45,642 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3698 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 8569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:45,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 139 Invalid, 8569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-03-31 22:33:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2023-03-31 22:33:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4575. [2023-03-31 22:33:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4509 states have (on average 1.5917054779330229) internal successors, (7177), 4513 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (122), 38 states have call predecessors, (122), 22 states have call successors, (122) [2023-03-31 22:33:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 7322 transitions. [2023-03-31 22:33:45,759 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 7322 transitions. Word has length 47 [2023-03-31 22:33:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:45,760 INFO L495 AbstractCegarLoop]: Abstraction has 4575 states and 7322 transitions. [2023-03-31 22:33:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 22:33:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 7322 transitions. [2023-03-31 22:33:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 22:33:45,765 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:45,765 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] [2023-03-31 22:33:45,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:33:45,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:45,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1210478639, now seen corresponding path program 1 times [2023-03-31 22:33:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367591093] [2023-03-31 22:33:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:45,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:33:45,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:45,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367591093] [2023-03-31 22:33:45,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367591093] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497167406] [2023-03-31 22:33:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:46,009 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 22:33:46,013 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 22:33:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:46,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:46,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:33:46,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:46,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497167406] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:46,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:46,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:33:46,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804973158] [2023-03-31 22:33:46,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:46,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:46,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:33:46,212 INFO L87 Difference]: Start difference. First operand 4575 states and 7322 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:33:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:53,741 INFO L93 Difference]: Finished difference Result 14085 states and 22931 transitions. [2023-03-31 22:33:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:33:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2023-03-31 22:33:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:53,786 INFO L225 Difference]: With dead ends: 14085 [2023-03-31 22:33:53,787 INFO L226 Difference]: Without dead ends: 9515 [2023-03-31 22:33:53,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:33:53,799 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4043 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2439 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:53,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 157 Invalid, 8384 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2439 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-03-31 22:33:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2023-03-31 22:33:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 9355. [2023-03-31 22:33:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9149 states have (on average 1.3785113127117719) internal successors, (12612), 9177 states have internal predecessors, (12612), 43 states have call successors, (43), 43 states have call predecessors, (43), 162 states have return successors, (619), 134 states have call predecessors, (619), 42 states have call successors, (619) [2023-03-31 22:33:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13274 transitions. [2023-03-31 22:33:54,106 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13274 transitions. Word has length 57 [2023-03-31 22:33:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:54,107 INFO L495 AbstractCegarLoop]: Abstraction has 9355 states and 13274 transitions. [2023-03-31 22:33:54,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:33:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13274 transitions. [2023-03-31 22:33:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 22:33:54,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:54,114 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:54,125 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 22:33:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:54,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:54,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1087309923, now seen corresponding path program 1 times [2023-03-31 22:33:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:54,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848049397] [2023-03-31 22:33:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 22:33:54,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848049397] [2023-03-31 22:33:54,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848049397] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:54,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882549745] [2023-03-31 22:33:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:54,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:54,564 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 22:33:54,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process