/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/Problem02_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:18:45,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:18:45,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:18:45,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:18:45,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:18:45,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:18:45,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:18:45,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:18:45,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:18:45,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:18:45,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:18:45,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:18:45,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:18:45,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:18:45,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:18:45,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:18:45,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:18:45,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:18:45,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:18:45,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:18:45,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:18:45,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:18:45,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:18:45,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:18:45,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:18:45,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:18:45,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:18:45,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:18:45,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:18:45,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:18:45,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:18:45,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:18:45,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:18:45,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:18:45,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:18:45,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:18:45,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:18:45,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:18:45,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:18:45,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:18:45,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:18:45,699 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 09:18:45,727 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:18:45,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:18:45,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:18:45,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:18:45,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:18:45,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:18:45,729 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:18:45,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:18:45,729 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:18:45,729 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:18:45,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:18:45,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:18:45,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:18:45,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:18:45,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:18:45,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:18:45,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:18:45,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:18:45,733 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:18:45,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:18:45,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:18:45,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:18:45,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:18:45,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:18:45,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:18:45,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:18:45,939 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:18:45,940 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:18:45,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label15.c [2023-04-01 09:18:46,813 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:18:47,054 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:18:47,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label15.c [2023-04-01 09:18:47,062 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b874ef2/e81f16171128491b93a036852425e24b/FLAGf2d107144 [2023-04-01 09:18:47,085 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b874ef2/e81f16171128491b93a036852425e24b [2023-04-01 09:18:47,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:18:47,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:18:47,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:18:47,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:18:47,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:18:47,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751709e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47, skipping insertion in model container [2023-04-01 09:18:47,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:18:47,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:18:47,345 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/Problem02_label15.c[20193,20206] [2023-04-01 09:18:47,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:18:47,388 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:18:47,453 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/Problem02_label15.c[20193,20206] [2023-04-01 09:18:47,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:18:47,468 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:18:47,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47 WrapperNode [2023-04-01 09:18:47,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:18:47,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:18:47,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:18:47,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:18:47,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:18:47,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:18:47,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:18:47,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:18:47,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (1/1) ... [2023-04-01 09:18:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:18:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:47,593 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 09:18:47,612 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 09:18:47,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:18:47,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:18:47,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:18:47,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:18:47,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:18:47,621 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:18:47,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:18:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:18:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:18:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:18:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:18:47,691 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:18:47,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:18:48,325 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:18:48,533 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:18:48,533 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:18:48,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:18:48 BoogieIcfgContainer [2023-04-01 09:18:48,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:18:48,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:18:48,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:18:48,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:18:48,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:18:47" (1/3) ... [2023-04-01 09:18:48,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722d80c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:18:48, skipping insertion in model container [2023-04-01 09:18:48,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:18:47" (2/3) ... [2023-04-01 09:18:48,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722d80c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:18:48, skipping insertion in model container [2023-04-01 09:18:48,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:18:48" (3/3) ... [2023-04-01 09:18:48,542 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label15.c [2023-04-01 09:18:48,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:18:48,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:18:48,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:18:48,587 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;@48b7d0d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:18:48,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:18:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:18:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:18:48,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:48,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:18:48,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:48,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2027404328, now seen corresponding path program 1 times [2023-04-01 09:18:48,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780516631] [2023-04-01 09:18:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:49,162 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 09:18:49,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:49,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780516631] [2023-04-01 09:18:49,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780516631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:49,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:18:49,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:18:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274813902] [2023-04-01 09:18:49,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:18:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:18:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:18:49,200 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:18:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:49,512 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:18:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:18:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 09:18:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:49,520 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:18:49,521 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:18:49,523 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 09:18:49,525 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:49,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:18:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:18:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:18:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:18:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:18:49,559 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:18:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:49,559 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:18:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:18:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:18:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:18:49,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:49,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:18:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:18:49,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:49,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash -78193756, now seen corresponding path program 1 times [2023-04-01 09:18:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971747729] [2023-04-01 09:18:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:50,007 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 09:18:50,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971747729] [2023-04-01 09:18:50,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971747729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:50,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:18:50,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:18:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823941131] [2023-04-01 09:18:50,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:50,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:18:50,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:18:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:18:50,010 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:18:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:50,400 INFO L93 Difference]: Finished difference Result 535 states and 970 transitions. [2023-04-01 09:18:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:18:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:18:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:50,404 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:18:50,404 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:18:50,405 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 09:18:50,406 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:50,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 47 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:18:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:18:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2023-04-01 09:18:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.640117994100295) internal successors, (556), 347 states have internal predecessors, (556), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:18:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 591 transitions. [2023-04-01 09:18:50,437 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 591 transitions. Word has length 94 [2023-04-01 09:18:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:50,449 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 591 transitions. [2023-04-01 09:18:50,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:18:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 591 transitions. [2023-04-01 09:18:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 09:18:50,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:50,453 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:18:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:18:50,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:50,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1643545738, now seen corresponding path program 1 times [2023-04-01 09:18:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580989957] [2023-04-01 09:18:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:18:50,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580989957] [2023-04-01 09:18:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580989957] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:18:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:18:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976089198] [2023-04-01 09:18:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:18:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:18:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:18:50,640 INFO L87 Difference]: Start difference. First operand 359 states and 591 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 09:18:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:50,964 INFO L93 Difference]: Finished difference Result 1107 states and 1947 transitions. [2023-04-01 09:18:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:18:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-04-01 09:18:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:50,970 INFO L225 Difference]: With dead ends: 1107 [2023-04-01 09:18:50,970 INFO L226 Difference]: Without dead ends: 753 [2023-04-01 09:18:50,976 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 09:18:50,978 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 290 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:50,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 44 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:18:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-04-01 09:18:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 725. [2023-04-01 09:18:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 682 states have (on average 1.563049853372434) internal successors, (1066), 705 states have internal predecessors, (1066), 10 states have call successors, (10), 10 states have call predecessors, (10), 32 states have return successors, (109), 9 states have call predecessors, (109), 9 states have call successors, (109) [2023-04-01 09:18:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1185 transitions. [2023-04-01 09:18:51,034 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1185 transitions. Word has length 97 [2023-04-01 09:18:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:51,036 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1185 transitions. [2023-04-01 09:18:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 09:18:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1185 transitions. [2023-04-01 09:18:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 09:18:51,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:51,044 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:18:51,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:18:51,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:51,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 255928378, now seen corresponding path program 1 times [2023-04-01 09:18:51,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:51,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688984181] [2023-04-01 09:18:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:18:51,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:51,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688984181] [2023-04-01 09:18:51,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688984181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:51,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179411756] [2023-04-01 09:18:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:51,210 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 09:18:51,212 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 09:18:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:51,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:18:51,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:18:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:18:51,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:18:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:18:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179411756] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:51,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:18:51,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-01 09:18:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398524472] [2023-04-01 09:18:51,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:51,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:18:51,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:18:51,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:18:51,664 INFO L87 Difference]: Start difference. First operand 725 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:18:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:51,957 INFO L93 Difference]: Finished difference Result 1811 states and 3104 transitions. [2023-04-01 09:18:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:18:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2023-04-01 09:18:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:51,962 INFO L225 Difference]: With dead ends: 1811 [2023-04-01 09:18:51,962 INFO L226 Difference]: Without dead ends: 1091 [2023-04-01 09:18:51,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:18:51,964 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:51,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 27 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:18:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2023-04-01 09:18:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1089. [2023-04-01 09:18:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1024 states have (on average 1.55078125) internal successors, (1588), 1061 states have internal predecessors, (1588), 14 states have call successors, (14), 14 states have call predecessors, (14), 50 states have return successors, (219), 13 states have call predecessors, (219), 13 states have call successors, (219) [2023-04-01 09:18:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1821 transitions. [2023-04-01 09:18:51,990 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1821 transitions. Word has length 99 [2023-04-01 09:18:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:51,991 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 1821 transitions. [2023-04-01 09:18:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:18:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1821 transitions. [2023-04-01 09:18:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 09:18:51,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:51,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 09:18:52,001 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 09:18:52,198 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 [2023-04-01 09:18:52,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:52,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1893838584, now seen corresponding path program 1 times [2023-04-01 09:18:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782777117] [2023-04-01 09:18:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:18:52,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782777117] [2023-04-01 09:18:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782777117] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649246338] [2023-04-01 09:18:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:52,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:52,307 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 09:18:52,309 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 09:18:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:52,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:18:52,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:18:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:18:52,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:18:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649246338] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:52,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:18:52,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:18:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735549003] [2023-04-01 09:18:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:18:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:18:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:18:52,432 INFO L87 Difference]: Start difference. First operand 1089 states and 1821 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 09:18:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:52,818 INFO L93 Difference]: Finished difference Result 2761 states and 4779 transitions. [2023-04-01 09:18:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:18:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 106 [2023-04-01 09:18:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:52,826 INFO L225 Difference]: With dead ends: 2761 [2023-04-01 09:18:52,826 INFO L226 Difference]: Without dead ends: 1677 [2023-04-01 09:18:52,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:18:52,829 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 257 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:52,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 39 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:18:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2023-04-01 09:18:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1645. [2023-04-01 09:18:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1542 states have (on average 1.4143968871595332) internal successors, (2181), 1605 states have internal predecessors, (2181), 20 states have call successors, (20), 20 states have call predecessors, (20), 82 states have return successors, (372), 19 states have call predecessors, (372), 19 states have call successors, (372) [2023-04-01 09:18:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2573 transitions. [2023-04-01 09:18:52,873 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2573 transitions. Word has length 106 [2023-04-01 09:18:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:52,873 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2573 transitions. [2023-04-01 09:18:52,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 09:18:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2573 transitions. [2023-04-01 09:18:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:18:52,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:52,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 09:18:52,884 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 09:18:53,082 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 09:18:53,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:53,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1602339322, now seen corresponding path program 1 times [2023-04-01 09:18:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936846999] [2023-04-01 09:18:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:18:53,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936846999] [2023-04-01 09:18:53,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936846999] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560481027] [2023-04-01 09:18:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:53,212 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 09:18:53,250 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 09:18:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:53,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:18:53,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:18:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 09:18:53,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:18:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560481027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:53,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:18:53,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:18:53,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566125247] [2023-04-01 09:18:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:18:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:18:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:18:53,400 INFO L87 Difference]: Start difference. First operand 1645 states and 2573 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:18:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:53,660 INFO L93 Difference]: Finished difference Result 2249 states and 3661 transitions. [2023-04-01 09:18:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:18:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 107 [2023-04-01 09:18:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:53,669 INFO L225 Difference]: With dead ends: 2249 [2023-04-01 09:18:53,669 INFO L226 Difference]: Without dead ends: 2247 [2023-04-01 09:18:53,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:18:53,670 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:53,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:18:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2023-04-01 09:18:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1905. [2023-04-01 09:18:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1792 states have (on average 1.4391741071428572) internal successors, (2579), 1859 states have internal predecessors, (2579), 23 states have call successors, (23), 23 states have call predecessors, (23), 89 states have return successors, (488), 22 states have call predecessors, (488), 22 states have call successors, (488) [2023-04-01 09:18:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3090 transitions. [2023-04-01 09:18:53,736 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3090 transitions. Word has length 107 [2023-04-01 09:18:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:53,736 INFO L495 AbstractCegarLoop]: Abstraction has 1905 states and 3090 transitions. [2023-04-01 09:18:53,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:18:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3090 transitions. [2023-04-01 09:18:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 09:18:53,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:53,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:18:53,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:18:53,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:53,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:53,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1555866299, now seen corresponding path program 1 times [2023-04-01 09:18:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371997564] [2023-04-01 09:18:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 09:18:54,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371997564] [2023-04-01 09:18:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371997564] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257368763] [2023-04-01 09:18:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:54,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:54,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:18:54,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:18:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:54,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:18:54,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:18:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 09:18:54,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:18:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257368763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:18:54,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:18:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:18:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92611147] [2023-04-01 09:18:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:18:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:18:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:18:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:18:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:18:54,300 INFO L87 Difference]: Start difference. First operand 1905 states and 3090 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:18:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:18:54,577 INFO L93 Difference]: Finished difference Result 4323 states and 7288 transitions. [2023-04-01 09:18:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:18:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 137 [2023-04-01 09:18:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:18:54,587 INFO L225 Difference]: With dead ends: 4323 [2023-04-01 09:18:54,587 INFO L226 Difference]: Without dead ends: 2423 [2023-04-01 09:18:54,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:18:54,591 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:18:54,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:18:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2023-04-01 09:18:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2245. [2023-04-01 09:18:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2122 states have (on average 1.3633364750235626) internal successors, (2893), 2191 states have internal predecessors, (2893), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (564), 26 states have call predecessors, (564), 26 states have call successors, (564) [2023-04-01 09:18:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3484 transitions. [2023-04-01 09:18:54,650 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3484 transitions. Word has length 137 [2023-04-01 09:18:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:18:54,650 INFO L495 AbstractCegarLoop]: Abstraction has 2245 states and 3484 transitions. [2023-04-01 09:18:54,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:18:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3484 transitions. [2023-04-01 09:18:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 09:18:54,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:18:54,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-04-01 09:18:54,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 09:18:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:54,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:18:54,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:18:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1783747053, now seen corresponding path program 1 times [2023-04-01 09:18:54,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:18:54,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112316914] [2023-04-01 09:18:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:18:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 93 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 09:18:55,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:18:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112316914] [2023-04-01 09:18:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112316914] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:18:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979214038] [2023-04-01 09:18:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:18:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:18:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:18:55,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:18:55,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:18:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:18:55,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:18:55,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:18:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:18:55,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:18:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:18:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979214038] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:18:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427813535] [2023-04-01 09:18:55,456 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:18:55,456 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:18:55,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:18:55,465 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:18:55,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:18:55,724 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs