/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:02:55,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:02:55,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:02:55,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:02:55,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:02:55,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:02:55,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:02:55,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:02:55,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:02:55,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:02:55,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:02:55,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:02:55,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:02:55,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:02:55,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:02:55,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:02:55,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:02:55,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:02:55,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:02:55,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:02:55,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:02:55,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:02:55,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:02:55,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:02:55,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:02:55,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:02:55,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:02:55,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:02:55,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:02:55,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:02:55,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:02:55,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:02:55,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:02:55,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:02:55,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:02:55,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:02:55,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:02:55,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:02:55,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:02:55,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:02:55,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:02:55,323 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 [2023-04-02 20:02:55,345 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:02:55,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:02:55,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:02:55,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:02:55,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:02:55,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:02:55,346 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:02:55,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:02:55,346 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:02:55,347 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:02:55,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:02:55,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:02:55,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:02:55,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:02:55,348 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:02:55,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:02:55,349 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:02:55,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:02:55,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:02:55,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:02:55,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:02:55,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:02:55,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:02:55,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:02:55,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:02:55,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:02:55,527 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:02:55,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label52.c [2023-04-02 20:02:56,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:02:56,786 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:02:56,787 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label52.c [2023-04-02 20:02:56,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edaf59cac/35cb7ca9ea7940b99eed9a8dd8f145e7/FLAG14a4d726f [2023-04-02 20:02:57,116 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edaf59cac/35cb7ca9ea7940b99eed9a8dd8f145e7 [2023-04-02 20:02:57,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:02:57,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:02:57,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:02:57,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:02:57,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:02:57,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15364012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57, skipping insertion in model container [2023-04-02 20:02:57,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:02:57,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:02:57,306 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_label52.c[4872,4885] [2023-04-02 20:02:57,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:02:57,637 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:02:57,662 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_label52.c[4872,4885] [2023-04-02 20:02:57,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:02:57,855 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:02:57,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57 WrapperNode [2023-04-02 20:02:57,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:02:57,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:02:57,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:02:57,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:02:57,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:57,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:02:57,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:02:57,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:02:57,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:02:58,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (1/1) ... [2023-04-02 20:02:58,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:02:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:02:58,050 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) [2023-04-02 20:02:58,093 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 [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:02:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:02:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:02:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:02:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:02:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:02:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:02:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:02:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:02:58,171 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:02:58,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:02:59,994 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:03:00,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:03:00,469 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:03:00,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:03:00 BoogieIcfgContainer [2023-04-02 20:03:00,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:03:00,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:03:00,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:03:00,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:03:00,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:02:57" (1/3) ... [2023-04-02 20:03:00,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44300bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:03:00, skipping insertion in model container [2023-04-02 20:03:00,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:57" (2/3) ... [2023-04-02 20:03:00,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44300bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:03:00, skipping insertion in model container [2023-04-02 20:03:00,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:03:00" (3/3) ... [2023-04-02 20:03:00,476 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label52.c [2023-04-02 20:03:00,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:03:00,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:03:00,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:03:00,530 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;@4c1a1132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:03:00,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:03:00,533 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) [2023-04-02 20:03:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:03:00,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:00,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:03:00,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:00,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 468031652, now seen corresponding path program 1 times [2023-04-02 20:03:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445020250] [2023-04-02 20:03:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:03:00,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445020250] [2023-04-02 20:03:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445020250] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:03:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:03:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:03:00,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381537265] [2023-04-02 20:03:00,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:03:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:03:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:03:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:03:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:03:00,784 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) [2023-04-02 20:03:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:03:02,128 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-02 20:03:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:03:02,131 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 [2023-04-02 20:03:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:03:02,141 INFO L225 Difference]: With dead ends: 718 [2023-04-02 20:03:02,141 INFO L226 Difference]: Without dead ends: 471 [2023-04-02 20:03:02,146 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 [2023-04-02 20:03:02,149 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:03:02,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:03:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-02 20:03:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-02 20:03:02,199 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) [2023-04-02 20:03:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-02 20:03:02,202 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-02 20:03:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:03:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-02 20:03:02,202 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) [2023-04-02 20:03:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-02 20:03:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 20:03:02,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:02,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:03:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:03:02,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:02,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -732216930, now seen corresponding path program 1 times [2023-04-02 20:03:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195818430] [2023-04-02 20:03:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:03:02,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195818430] [2023-04-02 20:03:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195818430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:03:02,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:03:02,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:03:02,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616730221] [2023-04-02 20:03:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:03:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:03:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:03:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:03:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:03:02,367 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) [2023-04-02 20:03:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:03:03,450 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-02 20:03:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:03:03,452 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 [2023-04-02 20:03:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:03:03,457 INFO L225 Difference]: With dead ends: 1395 [2023-04-02 20:03:03,457 INFO L226 Difference]: Without dead ends: 931 [2023-04-02 20:03:03,458 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 [2023-04-02 20:03:03,458 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 20:03:03,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 20:03:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-02 20:03:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-02 20:03:03,520 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) [2023-04-02 20:03:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-02 20:03:03,527 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-02 20:03:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:03:03,527 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-02 20:03:03,527 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) [2023-04-02 20:03:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-02 20:03:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 20:03:03,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:03,529 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] [2023-04-02 20:03:03,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:03:03,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:03,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1930037253, now seen corresponding path program 1 times [2023-04-02 20:03:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574173647] [2023-04-02 20:03:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 20:03:03,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:03,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574173647] [2023-04-02 20:03:03,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574173647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:03:03,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:03:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:03:03,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218597019] [2023-04-02 20:03:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:03:03,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:03:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:03:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:03:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:03:03,880 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) [2023-04-02 20:03:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:03:05,576 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-02 20:03:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 20:03:05,577 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 [2023-04-02 20:03:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:03:05,582 INFO L225 Difference]: With dead ends: 2350 [2023-04-02 20:03:05,582 INFO L226 Difference]: Without dead ends: 1426 [2023-04-02 20:03:05,584 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 [2023-04-02 20:03:05,584 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:03:05,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 20:03:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-02 20:03:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-02 20:03:05,610 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) [2023-04-02 20:03:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-02 20:03:05,614 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-02 20:03:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:03:05,614 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-02 20:03:05,614 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) [2023-04-02 20:03:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-02 20:03:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-02 20:03:05,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:05,618 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] [2023-04-02 20:03:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:03:05,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:05,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash 731927091, now seen corresponding path program 1 times [2023-04-02 20:03:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:05,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387844908] [2023-04-02 20:03:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:05,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:03:06,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387844908] [2023-04-02 20:03:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387844908] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:03:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735254215] [2023-04-02 20:03:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:03:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:03:06,276 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) [2023-04-02 20:03:06,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:03:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:06,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 20:03:06,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:03:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:03:06,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:03:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735254215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:03:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:03:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-02 20:03:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846881527] [2023-04-02 20:03:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:03:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:03:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:03:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:03:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 20:03:06,957 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 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) [2023-04-02 20:03:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:03:08,642 INFO L93 Difference]: Finished difference Result 3296 states and 4190 transitions. [2023-04-02 20:03:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:03:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 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 173 [2023-04-02 20:03:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:03:08,648 INFO L225 Difference]: With dead ends: 3296 [2023-04-02 20:03:08,648 INFO L226 Difference]: Without dead ends: 1898 [2023-04-02 20:03:08,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-02 20:03:08,651 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 417 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:03:08,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 50 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 20:03:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2023-04-02 20:03:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1886. [2023-04-02 20:03:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1839 states have (on average 1.2267536704730833) internal successors, (2256), 1857 states have internal predecessors, (2256), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (64), 13 states have call predecessors, (64), 14 states have call successors, (64) [2023-04-02 20:03:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2335 transitions. [2023-04-02 20:03:08,688 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2335 transitions. Word has length 173 [2023-04-02 20:03:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:03:08,688 INFO L495 AbstractCegarLoop]: Abstraction has 1886 states and 2335 transitions. [2023-04-02 20:03:08,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 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) [2023-04-02 20:03:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2335 transitions. [2023-04-02 20:03:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-02 20:03:08,690 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:08,691 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, 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] [2023-04-02 20:03:08,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 20:03:08,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:03:08,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:08,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 282406050, now seen corresponding path program 1 times [2023-04-02 20:03:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174603490] [2023-04-02 20:03:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 20:03:09,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174603490] [2023-04-02 20:03:09,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174603490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:03:09,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:03:09,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:03:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164394114] [2023-04-02 20:03:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:03:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:03:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:03:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:03:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:03:09,157 INFO L87 Difference]: Start difference. First operand 1886 states and 2335 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) [2023-04-02 20:03:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:03:10,563 INFO L93 Difference]: Finished difference Result 3784 states and 4977 transitions. [2023-04-02 20:03:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:03:10,564 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 188 [2023-04-02 20:03:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:03:10,604 INFO L225 Difference]: With dead ends: 3784 [2023-04-02 20:03:10,604 INFO L226 Difference]: Without dead ends: 2360 [2023-04-02 20:03:10,621 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 [2023-04-02 20:03:10,623 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 232 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:03:10,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 179 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 20:03:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2023-04-02 20:03:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2125. [2023-04-02 20:03:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2073 states have (on average 1.2267245537867824) internal successors, (2543), 2092 states have internal predecessors, (2543), 17 states have call successors, (17), 17 states have call predecessors, (17), 34 states have return successors, (87), 15 states have call predecessors, (87), 16 states have call successors, (87) [2023-04-02 20:03:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 2647 transitions. [2023-04-02 20:03:10,670 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 2647 transitions. Word has length 188 [2023-04-02 20:03:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:03:10,672 INFO L495 AbstractCegarLoop]: Abstraction has 2125 states and 2647 transitions. [2023-04-02 20:03:10,672 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) [2023-04-02 20:03:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 2647 transitions. [2023-04-02 20:03:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-02 20:03:10,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:03:10,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 20:03:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 20:03:10,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:03:10,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:03:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1077212821, now seen corresponding path program 1 times [2023-04-02 20:03:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:03:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546507350] [2023-04-02 20:03:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:03:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 20:03:11,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:03:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546507350] [2023-04-02 20:03:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546507350] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:03:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228450003] [2023-04-02 20:03:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:03:11,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:03:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:03:11,313 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) [2023-04-02 20:03:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 20:03:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:03:11,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 20:03:11,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:03:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:03:12,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:03:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:03:13,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228450003] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:03:13,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722864991] [2023-04-02 20:03:13,913 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-02 20:03:13,914 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:03:13,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:03:13,919 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:03:13,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:03:14,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-02 20:03:14,286 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-04-02 20:03:15,764 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 50915 conjuctions. This might take some time... [2023-04-02 20:03:19,754 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1033 conjuctions. [2023-04-02 20:03:27,086 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28