/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/Problem17_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:23:45,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:23:45,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:23:45,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:23:45,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:23:45,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:23:45,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:23:45,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:23:45,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:23:45,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:23:45,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:23:45,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:23:45,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:23:45,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:23:45,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:23:45,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:23:45,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:23:45,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:23:45,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:23:45,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:23:45,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:23:45,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:23:45,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:23:45,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:23:45,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:23:45,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:23:45,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:23:45,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:23:45,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:23:45,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:23:45,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:23:45,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:23:45,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:23:45,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:23:45,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:23:45,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:23:45,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:23:45,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:23:45,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:23:45,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:23:45,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:23:45,200 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 22:23:45,218 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:23:45,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:23:45,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:23:45,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:23:45,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:23:45,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:23:45,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:23:45,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:23:45,220 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:23:45,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:23:45,221 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:23:45,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:23:45,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:23:45,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:23:45,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:23:45,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:23:45,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:23:45,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:23:45,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:23:45,376 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:23:45,376 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:23:45,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label52.c [2023-03-31 22:23:46,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:23:46,606 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:23:46,606 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label52.c [2023-03-31 22:23:46,625 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f249feb4a/4a618874bcc5462eacc0f20a5e3d0c98/FLAG8185ab034 [2023-03-31 22:23:46,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f249feb4a/4a618874bcc5462eacc0f20a5e3d0c98 [2023-03-31 22:23:46,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:23:46,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:23:46,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:23:46,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:23:46,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:23:46,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:23:46" (1/1) ... [2023-03-31 22:23:46,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d22f79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:46, skipping insertion in model container [2023-03-31 22:23:46,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:23:46" (1/1) ... [2023-03-31 22:23:46,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:23:46,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:23:46,846 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/Problem17_label52.c[1111,1124] [2023-03-31 22:23:47,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:23:47,216 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:23:47,225 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/Problem17_label52.c[1111,1124] [2023-03-31 22:23:47,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:23:47,419 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:23:47,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47 WrapperNode [2023-03-31 22:23:47,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:23:47,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:23:47,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:23:47,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:23:47,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:23:47,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:23:47,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:23:47,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:23:47,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (1/1) ... [2023-03-31 22:23:47,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:23:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:23:47,607 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 22:23:47,622 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 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:23:47,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:23:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:23:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:23:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:23:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:23:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:23:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:23:47,683 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:23:47,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:23:49,918 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:23:57,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:23:57,325 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:23:57,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:23:57 BoogieIcfgContainer [2023-03-31 22:23:57,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:23:57,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:23:57,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:23:57,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:23:57,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:23:46" (1/3) ... [2023-03-31 22:23:57,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f7f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:23:57, skipping insertion in model container [2023-03-31 22:23:57,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:47" (2/3) ... [2023-03-31 22:23:57,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f7f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:23:57, skipping insertion in model container [2023-03-31 22:23:57,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:23:57" (3/3) ... [2023-03-31 22:23:57,333 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label52.c [2023-03-31 22:23:57,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:23:57,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:23:57,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:23:57,382 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;@4f966359, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:23:57,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:23:57,385 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 22:23:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:23:57,390 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:23:57,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:23:57,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:23:57,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:23:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2086190771, now seen corresponding path program 1 times [2023-03-31 22:23:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:23:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498025810] [2023-03-31 22:23:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:23:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:57,582 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 22:23:57,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:23:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498025810] [2023-03-31 22:23:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498025810] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:23:57,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:23:57,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:23:57,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83078545] [2023-03-31 22:23:57,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:23:57,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:23:57,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:23:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:23:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:23:57,606 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 22:23:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:23:58,920 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:23:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:23:58,922 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 22:23:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:23:58,932 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:23:58,932 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:23:58,936 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 22:23:58,938 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:23:58,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 171 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:23:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:23:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:23:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.6296296296296295) internal successors, (748), 459 states have internal predecessors, (748), 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 22:23:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 759 transitions. [2023-03-31 22:23:58,986 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 759 transitions. Word has length 11 [2023-03-31 22:23:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:23:58,986 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 759 transitions. [2023-03-31 22:23:58,986 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 22:23:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 759 transitions. [2023-03-31 22:23:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:23:58,987 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:23:58,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:23:58,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:23:58,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:23:58,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:23:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1027203072, now seen corresponding path program 1 times [2023-03-31 22:23:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:23:58,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342230406] [2023-03-31 22:23:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:23:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:59,128 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 22:23:59,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:23:59,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342230406] [2023-03-31 22:23:59,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342230406] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:23:59,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:23:59,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:23:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045367573] [2023-03-31 22:23:59,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:23:59,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:23:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:23:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:23:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:23:59,130 INFO L87 Difference]: Start difference. First operand 469 states and 759 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-03-31 22:24:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:24:00,888 INFO L93 Difference]: Finished difference Result 1416 states and 2311 transitions. [2023-03-31 22:24:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:24:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-03-31 22:24:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:24:00,893 INFO L225 Difference]: With dead ends: 1416 [2023-03-31 22:24:00,894 INFO L226 Difference]: Without dead ends: 952 [2023-03-31 22:24:00,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:24:00,896 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 736 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:24:00,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 49 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:24:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-03-31 22:24:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 706. [2023-03-31 22:24:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 689 states have (on average 1.4238026124818577) internal successors, (981), 692 states have internal predecessors, (981), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-03-31 22:24:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1007 transitions. [2023-03-31 22:24:00,921 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1007 transitions. Word has length 23 [2023-03-31 22:24:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:24:00,922 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1007 transitions. [2023-03-31 22:24:00,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-03-31 22:24:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1007 transitions. [2023-03-31 22:24:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:24:00,922 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:24:00,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:24:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:24:00,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:24:00,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:24:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 895165348, now seen corresponding path program 1 times [2023-03-31 22:24:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:24:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852783327] [2023-03-31 22:24:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:24:00,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:24:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:24:01,006 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 22:24:01,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:24:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852783327] [2023-03-31 22:24:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852783327] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:24:01,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:24:01,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:24:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852411737] [2023-03-31 22:24:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:24:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:24:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:24:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:24:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:24:01,008 INFO L87 Difference]: Start difference. First operand 706 states and 1007 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 22:24:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:24:02,245 INFO L93 Difference]: Finished difference Result 1869 states and 2720 transitions. [2023-03-31 22:24:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:24:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 26 [2023-03-31 22:24:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:24:02,257 INFO L225 Difference]: With dead ends: 1869 [2023-03-31 22:24:02,258 INFO L226 Difference]: Without dead ends: 1168 [2023-03-31 22:24:02,259 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 22:24:02,260 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 248 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:24:02,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 391 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:24:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2023-03-31 22:24:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 961. [2023-03-31 22:24:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 939 states have (on average 1.3801916932907348) internal successors, (1296), 943 states have internal predecessors, (1296), 9 states have call successors, (9), 9 states have call predecessors, (9), 12 states have return successors, (37), 8 states have call predecessors, (37), 8 states have call successors, (37) [2023-03-31 22:24:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1342 transitions. [2023-03-31 22:24:02,282 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1342 transitions. Word has length 26 [2023-03-31 22:24:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:24:02,282 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1342 transitions. [2023-03-31 22:24:02,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 22:24:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1342 transitions. [2023-03-31 22:24:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 22:24:02,284 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:24:02,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:24:02,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:24:02,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:24:02,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:24:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash 470041423, now seen corresponding path program 1 times [2023-03-31 22:24:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:24:02,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415588268] [2023-03-31 22:24:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:24:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:24:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:24:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:24:02,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:24:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415588268] [2023-03-31 22:24:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415588268] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:24:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733599090] [2023-03-31 22:24:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:24:02,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:24:02,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:24:02,413 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 22:24:02,416 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 22:24:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:24:02,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:24:02,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:24:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:24:02,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:24:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:24:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733599090] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:24:02,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328635853] [2023-03-31 22:24:02,720 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-03-31 22:24:02,720 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:24:02,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:24:02,726 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:24:02,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:24:02,841 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-03-31 22:24:03,045 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-03-31 22:24:04,947 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25840 conjuctions. This might take some time... [2023-03-31 22:24:05,338 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 30 conjuctions. [2023-03-31 22:24:05,762 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 22:24:06,095 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-03-31 22:24:08,357 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19919 conjuctions. This might take some time... [2023-03-31 22:24:08,721 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 29 conjuctions. [2023-03-31 22:24:32,943 WARN L223 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 482 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)