/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:10:45,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:10:45,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:10:45,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:10:45,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:10:45,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:10:45,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:10:45,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:10:45,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:10:45,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:10:45,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:10:45,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:10:45,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:10:45,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:10:45,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:10:45,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:10:45,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:10:45,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:10:45,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:10:45,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:10:45,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:10:45,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:10:45,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:10:45,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:10:45,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:10:45,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:10:45,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:10:45,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:10:45,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:10:45,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:10:45,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:10:45,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:10:45,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:10:45,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:10:45,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:10:45,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:10:45,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:10:45,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:10:45,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:10:45,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:10:45,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:10:45,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:10:45,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:10:45,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:10:45,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:10:45,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:10:45,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:10:45,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:10:45,216 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:10:45,216 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:10:45,216 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:10:45,216 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:10:45,217 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:10:45,217 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:10:45,217 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:10:45,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:10:45,217 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:10:45,218 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:10:45,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:10:45,218 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:10:45,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:10:45,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:10:45,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:10:45,220 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:10:45,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:10:45,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:10:45,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:10:45,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:45,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:10:45,220 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:10:45,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:10:45,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:10:45,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:10:45,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:10:45,467 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:10:45,468 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:10:45,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label03.c [2023-03-31 22:10:46,650 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:10:46,965 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:10:46,965 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label03.c [2023-03-31 22:10:46,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b610ee0e1/dd70904643d64077ba57c828b8df3261/FLAG2d50b9eb0 [2023-03-31 22:10:46,992 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b610ee0e1/dd70904643d64077ba57c828b8df3261 [2023-03-31 22:10:46,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:10:46,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:10:46,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:46,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:10:47,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:10:47,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:46" (1/1) ... [2023-03-31 22:10:47,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9ba8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47, skipping insertion in model container [2023-03-31 22:10:47,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:46" (1/1) ... [2023-03-31 22:10:47,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:10:47,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:10:47,274 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_label03.c[2937,2950] [2023-03-31 22:10:47,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:47,712 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:10:47,742 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_label03.c[2937,2950] [2023-03-31 22:10:47,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:48,015 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:10:48,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48 WrapperNode [2023-03-31 22:10:48,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:48,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:10:48,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:10:48,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:10:48,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,172 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:10:48,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:10:48,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:10:48,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:10:48,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (1/1) ... [2023-03-31 22:10:48,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:48,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:10:48,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:10:48,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:10:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:10:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:10:48,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:10:48,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:10:48,341 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:10:48,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:10:51,038 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:10:51,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:10:51,668 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:10:51,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:51 BoogieIcfgContainer [2023-03-31 22:10:51,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:10:51,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:10:51,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:10:51,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:10:51,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:10:46" (1/3) ... [2023-03-31 22:10:51,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c4517a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:51, skipping insertion in model container [2023-03-31 22:10:51,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:48" (2/3) ... [2023-03-31 22:10:51,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c4517a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:51, skipping insertion in model container [2023-03-31 22:10:51,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:51" (3/3) ... [2023-03-31 22:10:51,677 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2023-03-31 22:10:51,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:10:51,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:10:51,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:10:51,744 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;@f09f702, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:10:51,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:10:51,749 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) [2023-03-31 22:10:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:10:51,755 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:51,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:51,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:51,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash 271514051, now seen corresponding path program 1 times [2023-03-31 22:10:51,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:51,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692775461] [2023-03-31 22:10:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:51,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:52,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692775461] [2023-03-31 22:10:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692775461] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:52,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:52,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955707530] [2023-03-31 22:10:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:52,203 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) [2023-03-31 22:10:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:53,866 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:10:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:53,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:10:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:53,882 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:10:53,882 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:10:53,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:53,890 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:53,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:10:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:10:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:10:53,954 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) [2023-03-31 22:10:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-03-31 22:10:53,959 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-03-31 22:10:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:53,959 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-03-31 22:10:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:10:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-03-31 22:10:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:10:53,961 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:53,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:10:53,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:53,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash -483764099, now seen corresponding path program 1 times [2023-03-31 22:10:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183786004] [2023-03-31 22:10:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:54,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:54,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183786004] [2023-03-31 22:10:54,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183786004] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:54,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136630394] [2023-03-31 22:10:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:54,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:54,119 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) [2023-03-31 22:10:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:55,443 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-03-31 22:10:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:55,445 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 [2023-03-31 22:10:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:55,449 INFO L225 Difference]: With dead ends: 1395 [2023-03-31 22:10:55,450 INFO L226 Difference]: Without dead ends: 931 [2023-03-31 22:10:55,451 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 [2023-03-31 22:10:55,452 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:10:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-03-31 22:10:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-03-31 22:10:55,505 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) [2023-03-31 22:10:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-03-31 22:10:55,510 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-03-31 22:10:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:55,510 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-03-31 22:10:55,510 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) [2023-03-31 22:10:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-03-31 22:10:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 22:10:55,512 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:55,513 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] [2023-03-31 22:10:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:10:55,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:55,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1035768090, now seen corresponding path program 1 times [2023-03-31 22:10:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427603458] [2023-03-31 22:10:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-31 22:10:55,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:55,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427603458] [2023-03-31 22:10:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427603458] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:55,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:55,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:10:55,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771424129] [2023-03-31 22:10:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:10:55,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:10:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:10:55,809 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) [2023-03-31 22:10:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:57,849 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-03-31 22:10:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:10:57,850 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 [2023-03-31 22:10:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:57,857 INFO L225 Difference]: With dead ends: 2350 [2023-03-31 22:10:57,858 INFO L226 Difference]: Without dead ends: 1426 [2023-03-31 22:10:57,860 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 [2023-03-31 22:10:57,861 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:57,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:10:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-03-31 22:10:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-03-31 22:10:57,898 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) [2023-03-31 22:10:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-03-31 22:10:57,904 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-03-31 22:10:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:57,904 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-03-31 22:10:57,904 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) [2023-03-31 22:10:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-03-31 22:10:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:10:57,910 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:57,910 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] [2023-03-31 22:10:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:10:57,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:57,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1662588014, now seen corresponding path program 1 times [2023-03-31 22:10:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:57,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408919154] [2023-03-31 22:10:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:10:58,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408919154] [2023-03-31 22:10:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408919154] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:58,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428159789] [2023-03-31 22:10:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:58,282 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:10:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:59,773 INFO L93 Difference]: Finished difference Result 3496 states and 4706 transitions. [2023-03-31 22:10:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-03-31 22:10:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:59,783 INFO L225 Difference]: With dead ends: 3496 [2023-03-31 22:10:59,783 INFO L226 Difference]: Without dead ends: 2098 [2023-03-31 22:10:59,786 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 [2023-03-31 22:10:59,787 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:59,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:10:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-03-31 22:10:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868. [2023-03-31 22:10:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2023-03-31 22:10:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions. [2023-03-31 22:10:59,843 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173 [2023-03-31 22:10:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:59,845 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions. [2023-03-31 22:10:59,846 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) [2023-03-31 22:10:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions. [2023-03-31 22:10:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:10:59,853 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:59,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:10:59,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1076778282, now seen corresponding path program 1 times [2023-03-31 22:10:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392671133] [2023-03-31 22:10:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:00,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:00,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392671133] [2023-03-31 22:11:00,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392671133] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:00,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409727393] [2023-03-31 22:11:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:00,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:00,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:11:00,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:11:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:00,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:11:00,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:00,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:11:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:00,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409727393] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:11:00,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473261532] [2023-03-31 22:11:00,754 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:11:00,755 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:11:00,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:11:00,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:11:00,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:11:00,899 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:11:01,238 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-03-31 22:11:01,474 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2023-03-31 22:11:01,916 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10064 conjuctions. This might take some time... [2023-03-31 22:11:02,073 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 154 conjuctions. [2023-03-31 22:11:03,070 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:11:03,134 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-03-31 22:11:14,989 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44