/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:17:20,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:17:20,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:17:20,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:17:20,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:17:20,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:17:20,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:17:20,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:17:20,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:17:20,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:17:20,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:17:20,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:17:20,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:17:20,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:17:20,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:17:20,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:17:20,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:17:20,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:17:20,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:17:20,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:17:20,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:17:20,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:17:20,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:17:20,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:17:20,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:17:20,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:17:20,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:17:20,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:17:20,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:17:20,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:17:20,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:17:20,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:17:20,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:17:20,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:17:20,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:17:20,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:17:20,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:17:20,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:17:20,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:17:20,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:17:20,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:17:20,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:17:20,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:17:20,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:17:20,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:17:20,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:17:20,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:17:20,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:17:20,411 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:17:20,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:17:20,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:17:20,413 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:17:20,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:17:20,413 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:17:20,413 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:17:20,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:17:20,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:17:20,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:17:20,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:17:20,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:17:20,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:17:20,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:17:20,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:17:20,415 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:17:20,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:17:20,416 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:17:20,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:17:20,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:17:20,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:17:20,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:20,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:17:20,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:17:20,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:17:20,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:17:20,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:17:20,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:17:20,625 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:17:20,627 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:17:20,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2023-04-01 10:17:21,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:17:22,182 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:17:22,183 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2023-04-01 10:17:22,203 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e2a7517/1924b815ad6040bbad662987f85e462f/FLAG1eab57d98 [2023-04-01 10:17:22,219 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e2a7517/1924b815ad6040bbad662987f85e462f [2023-04-01 10:17:22,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:17:22,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:17:22,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:22,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:17:22,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:17:22,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:22" (1/1) ... [2023-04-01 10:17:22,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585db3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:22, skipping insertion in model container [2023-04-01 10:17:22,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:22" (1/1) ... [2023-04-01 10:17:22,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:17:22,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:17:22,443 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/Problem15_label30.c[1915,1928] [2023-04-01 10:17:22,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:22,878 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:17:22,902 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/Problem15_label30.c[1915,1928] [2023-04-01 10:17:23,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:23,176 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:17:23,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23 WrapperNode [2023-04-01 10:17:23,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:23,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:17:23,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:17:23,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:17:23,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,333 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:17:23,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:17:23,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:17:23,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:17:23,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (1/1) ... [2023-04-01 10:17:23,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:23,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:17:23,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:17:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:17:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:17:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:17:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:17:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:17:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:17:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:17:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:17:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:17:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:17:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:17:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:17:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:17:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:17:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:17:23,565 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:17:23,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:17:25,984 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:17:26,624 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:17:26,624 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:17:26,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:26 BoogieIcfgContainer [2023-04-01 10:17:26,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:17:26,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:17:26,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:17:26,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:17:26,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:17:22" (1/3) ... [2023-04-01 10:17:26,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25f8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:26, skipping insertion in model container [2023-04-01 10:17:26,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:23" (2/3) ... [2023-04-01 10:17:26,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25f8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:26, skipping insertion in model container [2023-04-01 10:17:26,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:26" (3/3) ... [2023-04-01 10:17:26,634 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label30.c [2023-04-01 10:17:26,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:17:26,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:17:26,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:17:26,704 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;@b79e771, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:17:26,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:17:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:17:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:17:26,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:26,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:26,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:26,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash 468025252, now seen corresponding path program 1 times [2023-04-01 10:17:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076369895] [2023-04-01 10:17:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:27,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:27,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076369895] [2023-04-01 10:17:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076369895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:27,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:27,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485559965] [2023-04-01 10:17:27,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:27,091 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:17:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:29,026 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:17:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:17:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:29,052 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:17:29,052 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:17:29,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:29,072 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:29,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:17:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:17:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:17:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:17:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:17:29,131 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:17:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:29,131 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:17:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:17:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:17:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:17:29,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:29,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:17:29,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:29,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash -778963354, now seen corresponding path program 1 times [2023-04-01 10:17:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472215513] [2023-04-01 10:17:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:29,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:29,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472215513] [2023-04-01 10:17:29,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472215513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:29,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3377183] [2023-04-01 10:17:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:29,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:29,309 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:17:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:30,647 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-01 10:17:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 10:17:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:30,653 INFO L225 Difference]: With dead ends: 1395 [2023-04-01 10:17:30,653 INFO L226 Difference]: Without dead ends: 931 [2023-04-01 10:17:30,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:30,655 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:30,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:17:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-01 10:17:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-01 10:17:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 10:17:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-01 10:17:30,696 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-01 10:17:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:30,696 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-01 10:17:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:17:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-01 10:17:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 10:17:30,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:30,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:17:30,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:30,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1531052683, now seen corresponding path program 1 times [2023-04-01 10:17:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024889153] [2023-04-01 10:17:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 10:17:31,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:31,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024889153] [2023-04-01 10:17:31,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024889153] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:31,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:31,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:17:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974584242] [2023-04-01 10:17:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:31,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:17:31,085 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:17:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:33,234 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-01 10:17:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:17:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-04-01 10:17:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:33,243 INFO L225 Difference]: With dead ends: 2350 [2023-04-01 10:17:33,243 INFO L226 Difference]: Without dead ends: 1426 [2023-04-01 10:17:33,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:17:33,247 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:33,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:17:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-01 10:17:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-01 10:17:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-04-01 10:17:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-01 10:17:33,296 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-01 10:17:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:33,298 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-01 10:17:33,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:17:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-01 10:17:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 10:17:33,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:33,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:17:33,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:33,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1549268019, now seen corresponding path program 1 times [2023-04-01 10:17:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:33,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844510918] [2023-04-01 10:17:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:17:33,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844510918] [2023-04-01 10:17:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844510918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:33,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:33,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450531975] [2023-04-01 10:17:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:33,621 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:17:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:35,365 INFO L93 Difference]: Finished difference Result 3496 states and 4706 transitions. [2023-04-01 10:17:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 10:17:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:35,376 INFO L225 Difference]: With dead ends: 3496 [2023-04-01 10:17:35,376 INFO L226 Difference]: Without dead ends: 2098 [2023-04-01 10:17:35,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:35,388 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:35,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:17:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-04-01 10:17:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868. [2023-04-01 10:17:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2023-04-01 10:17:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions. [2023-04-01 10:17:35,438 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173 [2023-04-01 10:17:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:35,442 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions. [2023-04-01 10:17:35,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:17:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions. [2023-04-01 10:17:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 10:17:35,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:35,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:17:35,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:35,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -678714037, now seen corresponding path program 1 times [2023-04-01 10:17:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:35,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599096098] [2023-04-01 10:17:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:35,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:35,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599096098] [2023-04-01 10:17:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599096098] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436205816] [2023-04-01 10:17:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:35,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:35,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:17:35,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:17:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:35,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:17:35,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:17:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:36,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:17:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436205816] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:17:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180086288] [2023-04-01 10:17:36,244 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:17:36,244 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:17:36,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:17:36,255 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:17:36,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:17:36,572 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:17:36,976 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 10:17:42,905 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53