/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/Problem12_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:03:36,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:03:36,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:03:36,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:03:36,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:03:36,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:03:36,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:03:36,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:03:36,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:03:36,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:03:36,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:03:36,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:03:36,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:03:36,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:03:36,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:03:36,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:03:36,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:03:36,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:03:36,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:03:36,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:03:36,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:03:36,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:03:36,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:03:36,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:03:36,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:03:36,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:03:36,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:03:36,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:03:36,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:03:36,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:03:36,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:03:36,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:03:36,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:03:36,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:03:36,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:03:36,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:03:36,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:03:36,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:03:36,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:03:36,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:03:36,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:03:36,439 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 10:03:36,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:03:36,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:03:36,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:03:36,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:03:36,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:03:36,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:03:36,463 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:03:36,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:03:36,463 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:03:36,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:03:36,464 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:03:36,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:03:36,464 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:03:36,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:03:36,465 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:03:36,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:03:36,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:03:36,465 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:03:36,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:03:36,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:03:36,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:03:36,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:03:36,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:03:36,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:03:36,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:03:36,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:03:36,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:03:36,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:03:36,721 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:03:36,721 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:03:36,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label19.c [2023-04-01 10:03:38,075 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:03:38,604 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:03:38,605 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label19.c [2023-04-01 10:03:38,630 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d15046ee7/2a22b28751024d4bac95184b561c865d/FLAGb946cf783 [2023-04-01 10:03:38,645 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d15046ee7/2a22b28751024d4bac95184b561c865d [2023-04-01 10:03:38,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:03:38,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:03:38,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:03:38,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:03:38,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:03:38,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:38" (1/1) ... [2023-04-01 10:03:38,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7af02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:38, skipping insertion in model container [2023-04-01 10:03:38,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:38" (1/1) ... [2023-04-01 10:03:38,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:03:38,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:03:39,002 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_label19.c[2130,2143] [2023-04-01 10:03:39,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:03:39,725 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:03:39,739 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_label19.c[2130,2143] [2023-04-01 10:03:40,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:03:40,122 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:03:40,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40 WrapperNode [2023-04-01 10:03:40,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:03:40,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:03:40,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:03:40,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:03:40,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:03:40,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:03:40,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:03:40,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:03:40,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (1/1) ... [2023-04-01 10:03:40,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:03:40,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:40,402 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 10:03:40,428 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 10:03:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:03:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:03:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:03:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:03:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:03:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:03:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:03:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:03:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:03:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:03:40,531 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:03:40,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:03:44,234 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:03:44,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:03:44,786 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:03:44,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:44 BoogieIcfgContainer [2023-04-01 10:03:44,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:03:44,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:03:44,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:03:44,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:03:44,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:03:38" (1/3) ... [2023-04-01 10:03:44,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc6069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:44, skipping insertion in model container [2023-04-01 10:03:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:40" (2/3) ... [2023-04-01 10:03:44,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc6069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:44, skipping insertion in model container [2023-04-01 10:03:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:44" (3/3) ... [2023-04-01 10:03:44,796 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label19.c [2023-04-01 10:03:44,812 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:03:44,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:03:44,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:03:44,872 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;@24f151ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:03:44,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:03:44,878 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) [2023-04-01 10:03:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:03:44,884 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:44,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:44,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:44,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 636335617, now seen corresponding path program 1 times [2023-04-01 10:03:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537491262] [2023-04-01 10:03:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:44,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:45,185 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 10:03:45,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537491262] [2023-04-01 10:03:45,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537491262] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:45,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:45,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:03:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104110431] [2023-04-01 10:03:45,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:03:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:03:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:03:45,227 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) [2023-04-01 10:03:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:48,618 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:03:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:03:48,621 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 10:03:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:48,646 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:03:48,646 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:03:48,654 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 10:03:48,658 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:48,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 10:03:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:03:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:03:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 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) [2023-04-01 10:03:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-01 10:03:48,756 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-01 10:03:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:48,756 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-01 10:03:48,756 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 10:03:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-01 10:03:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:03:48,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:48,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:03:48,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:48,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash -815618132, now seen corresponding path program 1 times [2023-04-01 10:03:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:48,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185576647] [2023-04-01 10:03:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:48,987 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 10:03:48,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:48,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185576647] [2023-04-01 10:03:48,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185576647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:48,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:48,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813390424] [2023-04-01 10:03:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:48,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:48,991 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:03:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:53,421 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-01 10:03:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:03:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 10:03:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:53,434 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:03:53,435 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:03:53,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:03:53,439 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:53,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:03:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:03:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 10:03:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 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) [2023-04-01 10:03:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-01 10:03:53,538 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-01 10:03:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:53,538 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-01 10:03:53,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:03:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-01 10:03:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 10:03:53,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:53,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:53,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:03:53,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:53,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1901929633, now seen corresponding path program 1 times [2023-04-01 10:03:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:53,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391972947] [2023-04-01 10:03:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:53,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:03:53,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391972947] [2023-04-01 10:03:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391972947] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:03:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037783912] [2023-04-01 10:03:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:03:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:53,733 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 10:03:53,756 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 10:03:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:53,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:03:53,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:03:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:03:53,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:03:53,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037783912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:53,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:03:53,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:03:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773485238] [2023-04-01 10:03:53,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:53,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:03:53,907 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-04-01 10:03:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:57,755 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-01 10:03:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:03:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 43 [2023-04-01 10:03:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:57,787 INFO L225 Difference]: With dead ends: 8445 [2023-04-01 10:03:57,788 INFO L226 Difference]: Without dead ends: 5695 [2023-04-01 10:03:57,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:03:57,798 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:57,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 95 Invalid, 5310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:03:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-01 10:03:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-01 10:03:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.491941391941392) internal successors, (8146), 5483 states have internal predecessors, (8146), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-04-01 10:03:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8523 transitions. [2023-04-01 10:03:58,005 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8523 transitions. Word has length 43 [2023-04-01 10:03:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:58,005 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8523 transitions. [2023-04-01 10:03:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-04-01 10:03:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8523 transitions. [2023-04-01 10:03:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:03:58,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:58,010 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] [2023-04-01 10:03:58,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:03:58,219 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 [2023-04-01 10:03:58,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:58,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash 464968493, now seen corresponding path program 1 times [2023-04-01 10:03:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:58,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309588649] [2023-04-01 10:03:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:58,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:58,397 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 10:03:58,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:58,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309588649] [2023-04-01 10:03:58,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309588649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:58,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:58,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:58,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496734692] [2023-04-01 10:03:58,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:58,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:58,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:58,402 INFO L87 Difference]: Start difference. First operand 5583 states and 8523 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:02,597 INFO L93 Difference]: Finished difference Result 17084 states and 27298 transitions. [2023-04-01 10:04:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:04:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-04-01 10:04:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:02,652 INFO L225 Difference]: With dead ends: 17084 [2023-04-01 10:04:02,652 INFO L226 Difference]: Without dead ends: 11506 [2023-04-01 10:04:02,667 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 [2023-04-01 10:04:02,668 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:02,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 10:04:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-01 10:04:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-01 10:04:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3301649426894044) internal successors, (14274), 10821 states have internal predecessors, (14274), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-04-01 10:04:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15731 transitions. [2023-04-01 10:04:03,057 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15731 transitions. Word has length 42 [2023-04-01 10:04:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:03,058 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15731 transitions. [2023-04-01 10:04:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:04:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15731 transitions. [2023-04-01 10:04:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 10:04:03,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:03,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:03,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:04:03,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:03,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 281680944, now seen corresponding path program 1 times [2023-04-01 10:04:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037969372] [2023-04-01 10:04:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:04:03,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:03,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037969372] [2023-04-01 10:04:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037969372] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621699106] [2023-04-01 10:04:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:03,377 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) [2023-04-01 10:04:03,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:04:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:03,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:04:03,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:03,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:04:03,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621699106] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:03,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:04:03,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:04:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404416910] [2023-04-01 10:04:03,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:04:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:04:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:04:03,613 INFO L87 Difference]: Start difference. First operand 11063 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-04-01 10:04:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:04:07,468 INFO L93 Difference]: Finished difference Result 28698 states and 43618 transitions. [2023-04-01 10:04:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:04:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 80 [2023-04-01 10:04:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:04:07,545 INFO L225 Difference]: With dead ends: 28698 [2023-04-01 10:04:07,545 INFO L226 Difference]: Without dead ends: 17640 [2023-04-01 10:04:07,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:04:07,574 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:04:07,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:04:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-01 10:04:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-01 10:04:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3326930226793903) internal successors, (21507), 16283 states have internal predecessors, (21507), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-04-01 10:04:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24737 transitions. [2023-04-01 10:04:08,056 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24737 transitions. Word has length 80 [2023-04-01 10:04:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:04:08,057 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24737 transitions. [2023-04-01 10:04:08,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-04-01 10:04:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24737 transitions. [2023-04-01 10:04:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:04:08,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:08,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:04:08,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 10:04:08,266 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 [2023-04-01 10:04:08,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:08,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 827191213, now seen corresponding path program 1 times [2023-04-01 10:04:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:08,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384470452] [2023-04-01 10:04:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:08,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:08,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384470452] [2023-04-01 10:04:08,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384470452] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:04:08,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802193510] [2023-04-01 10:04:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:08,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:04:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:08,463 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) [2023-04-01 10:04:08,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:04:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:08,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:04:08,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:04:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:04:08,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:04:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:04:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802193510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:04:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454425809] [2023-04-01 10:04:09,050 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:04:09,050 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:04:09,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:04:09,072 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:04:09,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:04:09,563 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:04:09,778 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 10:04:12,691 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53