/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/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:01:05,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:01:05,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:01:05,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:01:05,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:01:05,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:01:05,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:01:05,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:01:05,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:01:05,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:01:05,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:01:05,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:01:05,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:01:05,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:01:05,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:01:05,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:01:05,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:01:05,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:01:05,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:01:05,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:01:05,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:01:05,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:01:05,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:01:05,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:01:05,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:01:05,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:01:05,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:01:05,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:01:05,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:01:05,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:01:05,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:01:05,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:01:05,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:01:05,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:01:05,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:01:05,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:01:05,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:01:05,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:01:05,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:01:05,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:01:05,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:01:05,359 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 22:01:05,372 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:01:05,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:01:05,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:01:05,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:01:05,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:01:05,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:01:05,373 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:01:05,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:01:05,374 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:01:05,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:01:05,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:01:05,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:01:05,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:01:05,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:05,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:01:05,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:01:05,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:01:05,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:01:05,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:01:05,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:01:05,597 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:01:05,597 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:01:05,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label50.c [2023-03-31 22:01:06,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:01:06,896 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:01:06,897 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c [2023-03-31 22:01:06,917 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbc8f0c2/deb1c90dea124cf2ae5e2feafeaaa451/FLAG44f59445a [2023-03-31 22:01:06,930 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbc8f0c2/deb1c90dea124cf2ae5e2feafeaaa451 [2023-03-31 22:01:06,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:01:06,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:01:06,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:06,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:01:06,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:01:06,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:06" (1/1) ... [2023-03-31 22:01:06,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196e9ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:06, skipping insertion in model container [2023-03-31 22:01:06,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:06" (1/1) ... [2023-03-31 22:01:06,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:01:07,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:01:07,184 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c[2573,2586] [2023-03-31 22:01:07,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:07,718 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:01:07,735 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c[2573,2586] [2023-03-31 22:01:08,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:08,064 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:01:08,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08 WrapperNode [2023-03-31 22:01:08,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:08,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:01:08,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:01:08,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:01:08,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,283 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:01:08,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:01:08,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:01:08,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:01:08,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:08,356 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 22:01:08,362 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 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:01:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:01:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:01:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:01:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:01:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:01:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:01:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:01:08,434 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:01:08,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:01:11,380 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:01:11,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:01:11,828 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:01:11,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:11 BoogieIcfgContainer [2023-03-31 22:01:11,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:01:11,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:01:11,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:01:11,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:01:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:01:06" (1/3) ... [2023-03-31 22:01:11,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77052579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:11, skipping insertion in model container [2023-03-31 22:01:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08" (2/3) ... [2023-03-31 22:01:11,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77052579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:11, skipping insertion in model container [2023-03-31 22:01:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:11" (3/3) ... [2023-03-31 22:01:11,836 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2023-03-31 22:01:11,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:01:11,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:01:11,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:01:11,896 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;@16c6881e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:01:11,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:01:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:01:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:01:11,906 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:11,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:11,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:11,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash 636336641, now seen corresponding path program 1 times [2023-03-31 22:01:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:11,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807577886] [2023-03-31 22:01:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:12,153 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 22:01:12,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807577886] [2023-03-31 22:01:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807577886] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:12,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:12,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:01:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141111271] [2023-03-31 22:01:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:01:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:01:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:12,179 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:01:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:15,010 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:01:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:01:15,016 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 22:01:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:15,031 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:01:15,031 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:01:15,036 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 22:01:15,038 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 718 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:15,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 126 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:01:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:01:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-03-31 22:01:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.9310600444773907) internal successors, (2605), 1349 states have internal predecessors, (2605), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:01:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2628 transitions. [2023-03-31 22:01:15,138 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2628 transitions. Word has length 11 [2023-03-31 22:01:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:15,139 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2628 transitions. [2023-03-31 22:01:15,139 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 22:01:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2628 transitions. [2023-03-31 22:01:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:01:15,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:15,140 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 22:01:15,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:01:15,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:15,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash 620603676, now seen corresponding path program 1 times [2023-03-31 22:01:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914836362] [2023-03-31 22:01:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:15,289 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 22:01:15,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:15,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914836362] [2023-03-31 22:01:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914836362] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241263750] [2023-03-31 22:01:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:15,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:15,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:15,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:15,292 INFO L87 Difference]: Start difference. First operand 1367 states and 2628 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 22:01:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:18,742 INFO L93 Difference]: Finished difference Result 4145 states and 7983 transitions. [2023-03-31 22:01:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:01:18,743 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 22:01:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:18,752 INFO L225 Difference]: With dead ends: 4145 [2023-03-31 22:01:18,753 INFO L226 Difference]: Without dead ends: 2783 [2023-03-31 22:01:18,755 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 22:01:18,756 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2704 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:18,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 89 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:01:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-03-31 22:01:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2754. [2023-03-31 22:01:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2712 states have (on average 1.6950589970501475) internal successors, (4597), 2716 states have internal predecessors, (4597), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-03-31 22:01:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4674 transitions. [2023-03-31 22:01:18,846 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4674 transitions. Word has length 21 [2023-03-31 22:01:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:18,846 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 4674 transitions. [2023-03-31 22:01:18,847 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 22:01:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4674 transitions. [2023-03-31 22:01:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:01:18,848 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:18,848 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] [2023-03-31 22:01:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:01:18,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:18,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -209778704, now seen corresponding path program 1 times [2023-03-31 22:01:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:18,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688787645] [2023-03-31 22:01:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:18,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688787645] [2023-03-31 22:01:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688787645] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587406061] [2023-03-31 22:01:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:18,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:18,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:18,998 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 22:01:19,024 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 22:01:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:19,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:01:19,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:01:19,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:01:19,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587406061] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:19,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:01:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2023-03-31 22:01:19,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243384168] [2023-03-31 22:01:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:19,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:01:19,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:01:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:01:19,343 INFO L87 Difference]: Start difference. First operand 2754 states and 4674 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:22,307 INFO L93 Difference]: Finished difference Result 8312 states and 14286 transitions. [2023-03-31 22:01:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:01:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-03-31 22:01:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:22,328 INFO L225 Difference]: With dead ends: 8312 [2023-03-31 22:01:22,328 INFO L226 Difference]: Without dead ends: 5563 [2023-03-31 22:01:22,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:01:22,335 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:22,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2196 Valid, 50 Invalid, 3638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1175 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:01:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2023-03-31 22:01:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5402. [2023-03-31 22:01:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5300 states have (on average 1.4671698113207547) internal successors, (7776), 5316 states have internal predecessors, (7776), 27 states have call successors, (27), 27 states have call predecessors, (27), 74 states have return successors, (298), 58 states have call predecessors, (298), 26 states have call successors, (298) [2023-03-31 22:01:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 8101 transitions. [2023-03-31 22:01:22,451 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 8101 transitions. Word has length 27 [2023-03-31 22:01:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:22,451 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 8101 transitions. [2023-03-31 22:01:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 8101 transitions. [2023-03-31 22:01:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 22:01:22,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:22,459 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] [2023-03-31 22:01:22,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:01:22,664 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 22:01:22,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:22,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash -720875471, now seen corresponding path program 1 times [2023-03-31 22:01:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:22,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61251486] [2023-03-31 22:01:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:22,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:22,832 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 22:01:22,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:22,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61251486] [2023-03-31 22:01:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61251486] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:22,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348633206] [2023-03-31 22:01:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:22,834 INFO L87 Difference]: Start difference. First operand 5402 states and 8101 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 22:01:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:25,872 INFO L93 Difference]: Finished difference Result 16668 states and 26548 transitions. [2023-03-31 22:01:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 72 [2023-03-31 22:01:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:25,914 INFO L225 Difference]: With dead ends: 16668 [2023-03-31 22:01:25,914 INFO L226 Difference]: Without dead ends: 11271 [2023-03-31 22:01:25,926 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 22:01:25,926 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2476 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2476 Valid, 101 Invalid, 4885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:01:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2023-03-31 22:01:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 11096. [2023-03-31 22:01:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 10779 states have (on average 1.4042118934966137) internal successors, (15136), 10858 states have internal predecessors, (15136), 51 states have call successors, (51), 51 states have call predecessors, (51), 265 states have return successors, (1566), 186 states have call predecessors, (1566), 50 states have call successors, (1566) [2023-03-31 22:01:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 16753 transitions. [2023-03-31 22:01:26,181 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 16753 transitions. Word has length 72 [2023-03-31 22:01:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:26,182 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 16753 transitions. [2023-03-31 22:01:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 22:01:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 16753 transitions. [2023-03-31 22:01:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 22:01:26,184 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:26,184 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:01:26,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:26,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash 558503208, now seen corresponding path program 1 times [2023-03-31 22:01:26,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:26,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667488618] [2023-03-31 22:01:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:01:26,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667488618] [2023-03-31 22:01:26,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667488618] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207497224] [2023-03-31 22:01:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:26,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:26,452 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 22:01:26,454 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 22:01:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:26,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:01:26,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 22:01:26,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:01:26,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207497224] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:26,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:01:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:01:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689100514] [2023-03-31 22:01:26,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:26,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:26,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:26,629 INFO L87 Difference]: Start difference. First operand 11096 states and 16753 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 22:01:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:29,686 INFO L93 Difference]: Finished difference Result 27972 states and 43825 transitions. [2023-03-31 22:01:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 85 [2023-03-31 22:01:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:29,796 INFO L225 Difference]: With dead ends: 27972 [2023-03-31 22:01:29,796 INFO L226 Difference]: Without dead ends: 16881 [2023-03-31 22:01:29,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:01:29,814 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2299 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:29,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2299 Valid, 93 Invalid, 4743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:01:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16881 states. [2023-03-31 22:01:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16881 to 16319. [2023-03-31 22:01:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16319 states, 15765 states have (on average 1.3381541389153186) internal successors, (21096), 15925 states have internal predecessors, (21096), 73 states have call successors, (73), 73 states have call predecessors, (73), 480 states have return successors, (3540), 320 states have call predecessors, (3540), 72 states have call successors, (3540) [2023-03-31 22:01:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16319 states to 16319 states and 24709 transitions. [2023-03-31 22:01:30,114 INFO L78 Accepts]: Start accepts. Automaton has 16319 states and 24709 transitions. Word has length 85 [2023-03-31 22:01:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 16319 states and 24709 transitions. [2023-03-31 22:01:30,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 22:01:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16319 states and 24709 transitions. [2023-03-31 22:01:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-31 22:01:30,118 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:30,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:01:30,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:01:30,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:30,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:30,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1203146727, now seen corresponding path program 1 times [2023-03-31 22:01:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402695759] [2023-03-31 22:01:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-31 22:01:30,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402695759] [2023-03-31 22:01:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402695759] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553233698] [2023-03-31 22:01:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:30,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:30,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:30,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:01:30,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:01:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:30,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:01:30,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 22:01:30,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-31 22:01:30,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553233698] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:01:30,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595486644] [2023-03-31 22:01:30,857 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-03-31 22:01:30,857 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:01:30,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:01:30,862 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:01:30,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:01:30,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 22:01:31,090 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:01:31,198 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:01:31,821 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 48 for LOIs [2023-03-31 22:01:31,845 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:01:32,962 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:01:37,585 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 121173 conjuctions. This might take some time... [2023-03-31 22:01:59,006 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1482 conjuctions.