/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:20:28,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:20:28,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:20:28,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:20:28,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:20:28,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:20:28,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:20:28,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:20:28,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:20:28,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:20:28,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:20:28,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:20:28,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:20:28,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:20:28,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:20:28,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:20:28,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:20:28,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:20:28,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:20:28,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:20:28,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:20:28,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:20:28,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:20:28,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:20:28,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:20:28,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:20:28,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:20:28,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:20:28,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:20:28,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:20:28,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:20:28,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:20:28,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:20:28,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:20:28,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:20:28,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:20:28,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:20:28,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:20:28,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:20:28,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:20:28,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:20:28,189 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 03:20:28,221 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:20:28,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:20:28,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:20:28,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:20:28,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:20:28,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:20:28,223 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:20:28,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:20:28,223 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:20:28,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:20:28,224 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:20:28,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:20:28,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:20:28,225 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:20:28,225 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:20:28,225 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:20:28,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:20:28,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:20:28,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:20:28,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:20:28,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:20:28,227 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:20:28,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:20:28,227 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:20:28,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:20:28,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:20:28,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:20:28,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:20:28,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:20:28,228 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:20:28,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:20:28,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:20:28,229 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:20:28,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:20:28,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:20:28,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:20:28,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:20:28,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:20:28,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:20:28,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:20:28,481 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:20:28,482 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:20:28,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-04-01 03:20:29,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:20:30,169 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:20:30,170 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-04-01 03:20:30,193 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31b795356/8652ee55fdab4a378e56a13f869d4b5b/FLAGeb374685e [2023-04-01 03:20:30,212 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31b795356/8652ee55fdab4a378e56a13f869d4b5b [2023-04-01 03:20:30,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:20:30,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:20:30,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:20:30,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:20:30,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:20:30,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:20:30" (1/1) ... [2023-04-01 03:20:30,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24714aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:30, skipping insertion in model container [2023-04-01 03:20:30,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:20:30" (1/1) ... [2023-04-01 03:20:30,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:20:30,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:20:30,818 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/Problem03_label10.c[58665,58678] [2023-04-01 03:20:30,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:20:30,863 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:20:31,030 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/Problem03_label10.c[58665,58678] [2023-04-01 03:20:31,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:20:31,061 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:20:31,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31 WrapperNode [2023-04-01 03:20:31,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:20:31,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:20:31,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:20:31,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:20:31,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,225 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:20:31,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:20:31,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:20:31,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:20:31,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (1/1) ... [2023-04-01 03:20:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:20:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:31,291 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 03:20:31,310 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 03:20:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:20:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:20:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:20:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:20:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:20:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:20:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:20:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:20:31,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:20:31,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:20:31,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:20:31,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:20:31,474 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:20:31,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:20:33,093 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:20:33,428 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:20:33,428 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:20:33,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:20:33 BoogieIcfgContainer [2023-04-01 03:20:33,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:20:33,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:20:33,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:20:33,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:20:33,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:20:30" (1/3) ... [2023-04-01 03:20:33,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbeec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:20:33, skipping insertion in model container [2023-04-01 03:20:33,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:31" (2/3) ... [2023-04-01 03:20:33,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbeec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:20:33, skipping insertion in model container [2023-04-01 03:20:33,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:20:33" (3/3) ... [2023-04-01 03:20:33,441 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2023-04-01 03:20:33,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:20:33,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:20:33,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:20:33,522 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;@16038181, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:20:33,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:20:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 03:20:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:20:33,542 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:33,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:20:33,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:33,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 597539062, now seen corresponding path program 1 times [2023-04-01 03:20:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164043595] [2023-04-01 03:20:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:34,761 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 03:20:34,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:34,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164043595] [2023-04-01 03:20:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164043595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:20:34,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:20:34,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:20:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199875254] [2023-04-01 03:20:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:34,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:20:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:20:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:20:34,816 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 03:20:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:35,724 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:20:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:20:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 03:20:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:35,752 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:20:35,752 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:20:35,757 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 03:20:35,761 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:35,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:20:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:20:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:20:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8907849829351535) internal successors, (554), 293 states have internal predecessors, (554), 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 03:20:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-04-01 03:20:35,834 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-04-01 03:20:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:35,837 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-04-01 03:20:35,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 03:20:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-04-01 03:20:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 03:20:35,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:35,840 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:20:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:20:35,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:35,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash 15713712, now seen corresponding path program 1 times [2023-04-01 03:20:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649951028] [2023-04-01 03:20:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:35,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:36,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649951028] [2023-04-01 03:20:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649951028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:20:36,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:20:36,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:20:36,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818082530] [2023-04-01 03:20:36,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:20:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:20:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:20:36,390 INFO L87 Difference]: Start difference. First operand 301 states and 563 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 03:20:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:36,837 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-04-01 03:20:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:20:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-04-01 03:20:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:36,845 INFO L225 Difference]: With dead ends: 911 [2023-04-01 03:20:36,845 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 03:20:36,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:20:36,856 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:36,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:20:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 03:20:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-04-01 03:20:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.879045996592845) internal successors, (1103), 591 states have internal predecessors, (1103), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 03:20:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 03:20:36,919 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 03:20:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:36,924 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 03:20:36,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 03:20:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 03:20:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 03:20:36,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:36,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:20:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:20:36,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:36,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1985103948, now seen corresponding path program 1 times [2023-04-01 03:20:36,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:36,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591573341] [2023-04-01 03:20:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:37,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591573341] [2023-04-01 03:20:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591573341] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:20:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689899701] [2023-04-01 03:20:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:20:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:37,781 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 03:20:37,800 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 03:20:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:38,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:20:38,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:20:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:20:38,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:20:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:20:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689899701] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 03:20:38,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:20:38,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2023-04-01 03:20:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947933421] [2023-04-01 03:20:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:20:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:20:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:20:38,656 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 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 03:20:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:39,346 INFO L93 Difference]: Finished difference Result 1809 states and 3464 transitions. [2023-04-01 03:20:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:20:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 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 160 [2023-04-01 03:20:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:39,353 INFO L225 Difference]: With dead ends: 1809 [2023-04-01 03:20:39,354 INFO L226 Difference]: Without dead ends: 1211 [2023-04-01 03:20:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:20:39,356 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:39,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 22 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:20:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-04-01 03:20:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2023-04-01 03:20:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1177 states have (on average 1.7238742565845369) internal successors, (2029), 1191 states have internal predecessors, (2029), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (92), 9 states have call predecessors, (92), 9 states have call successors, (92) [2023-04-01 03:20:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2131 transitions. [2023-04-01 03:20:39,393 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2131 transitions. Word has length 160 [2023-04-01 03:20:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:39,393 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 2131 transitions. [2023-04-01 03:20:39,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 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 03:20:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2131 transitions. [2023-04-01 03:20:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-01 03:20:39,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:39,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:20:39,412 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 03:20:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:20:39,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:39,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 555691462, now seen corresponding path program 1 times [2023-04-01 03:20:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280464203] [2023-04-01 03:20:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:20:39,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280464203] [2023-04-01 03:20:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280464203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:20:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876428191] [2023-04-01 03:20:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:20:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:39,996 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 03:20:40,020 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 03:20:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:40,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:20:40,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:20:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 03:20:40,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:20:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876428191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:20:40,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:20:40,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:20:40,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582021209] [2023-04-01 03:20:40,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:40,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:20:40,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:20:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:20:40,320 INFO L87 Difference]: Start difference. First operand 1211 states and 2131 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 03:20:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:41,228 INFO L93 Difference]: Finished difference Result 3713 states and 6846 transitions. [2023-04-01 03:20:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:20:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 175 [2023-04-01 03:20:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:41,251 INFO L225 Difference]: With dead ends: 3713 [2023-04-01 03:20:41,252 INFO L226 Difference]: Without dead ends: 2507 [2023-04-01 03:20:41,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:20:41,257 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 510 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:41,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 41 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:20:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2023-04-01 03:20:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2477. [2023-04-01 03:20:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2382 states have (on average 1.5978169605373636) internal successors, (3806), 2441 states have internal predecessors, (3806), 18 states have call successors, (18), 18 states have call predecessors, (18), 76 states have return successors, (411), 17 states have call predecessors, (411), 17 states have call successors, (411) [2023-04-01 03:20:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4235 transitions. [2023-04-01 03:20:41,375 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4235 transitions. Word has length 175 [2023-04-01 03:20:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:41,375 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 4235 transitions. [2023-04-01 03:20:41,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 03:20:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4235 transitions. [2023-04-01 03:20:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 03:20:41,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:41,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2023-04-01 03:20:41,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:20:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 03:20:41,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:41,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1395154262, now seen corresponding path program 1 times [2023-04-01 03:20:41,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:41,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84207361] [2023-04-01 03:20:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:41,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84207361] [2023-04-01 03:20:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84207361] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:20:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816332069] [2023-04-01 03:20:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:41,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:20:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:41,905 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 03:20:41,927 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 03:20:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:42,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:20:42,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:20:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:42,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:20:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:42,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816332069] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:20:42,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239405927] [2023-04-01 03:20:42,393 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:20:42,393 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:20:42,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:20:42,402 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:20:42,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:20:43,341 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:20:52,989 WARN L223 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)