/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/Problem18_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:24:46,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:24:46,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:24:46,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:24:46,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:24:46,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:24:46,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:24:46,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:24:46,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:24:46,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:24:46,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:24:46,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:24:46,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:24:46,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:24:46,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:24:46,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:24:46,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:24:46,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:24:46,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:24:46,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:24:46,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:24:46,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:24:46,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:24:46,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:24:46,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:24:46,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:24:46,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:24:46,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:24:46,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:24:46,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:24:46,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:24:46,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:24:46,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:24:46,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:24:46,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:24:46,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:24:46,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:24:46,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:24:46,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:24:46,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:24:46,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:24:46,190 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 22:24:46,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:24:46,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:24:46,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:24:46,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:24:46,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:24:46,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:24:46,213 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:24:46,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:24:46,213 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:24:46,213 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:24:46,214 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:24:46,214 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:24:46,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:24:46,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:24:46,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:24:46,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:24:46,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:24:46,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:24:46,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:24:46,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:24:46,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:24:46,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:24:46,425 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:24:46,426 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:24:46,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label04.c [2023-03-31 22:24:47,342 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:24:47,684 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:24:47,684 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label04.c [2023-03-31 22:24:47,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbe4e74a/2158adff0d284004a8d6613454a75c93/FLAG0990f3582 [2023-03-31 22:24:47,704 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbe4e74a/2158adff0d284004a8d6613454a75c93 [2023-03-31 22:24:47,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:24:47,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:24:47,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:24:47,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:24:47,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:24:47,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:24:47" (1/1) ... [2023-03-31 22:24:47,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa8de42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:47, skipping insertion in model container [2023-03-31 22:24:47,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:24:47" (1/1) ... [2023-03-31 22:24:47,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:24:47,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:24:47,922 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/Problem18_label04.c[5507,5520] [2023-03-31 22:24:48,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:24:48,385 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:24:48,404 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/Problem18_label04.c[5507,5520] [2023-03-31 22:24:48,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:24:48,634 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:24:48,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48 WrapperNode [2023-03-31 22:24:48,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:24:48,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:24:48,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:24:48,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:24:48,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:24:48,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:24:48,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:24:48,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:24:48,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (1/1) ... [2023-03-31 22:24:48,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:24:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:24:48,864 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 22:24:48,867 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 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:24:48,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:24:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:24:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:24:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:24:48,971 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:24:48,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:24:51,273 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:24:56,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:24:56,706 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:24:56,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:24:56 BoogieIcfgContainer [2023-03-31 22:24:56,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:24:56,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:24:56,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:24:56,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:24:56,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:24:47" (1/3) ... [2023-03-31 22:24:56,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89ec31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:24:56, skipping insertion in model container [2023-03-31 22:24:56,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:24:48" (2/3) ... [2023-03-31 22:24:56,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89ec31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:24:56, skipping insertion in model container [2023-03-31 22:24:56,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:24:56" (3/3) ... [2023-03-31 22:24:56,714 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label04.c [2023-03-31 22:24:56,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:24:56,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:24:56,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:24:56,764 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;@1a484121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:24:56,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:24:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:24:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:24:56,772 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:24:56,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:24:56,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:24:56,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:24:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash 314234883, now seen corresponding path program 1 times [2023-03-31 22:24:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:24:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717006744] [2023-03-31 22:24:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:24:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:24:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:24:56,963 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 22:24:56,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:24:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717006744] [2023-03-31 22:24:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717006744] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:24:56,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:24:56,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:24:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192816674] [2023-03-31 22:24:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:24:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:24:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:24:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:24:56,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:24:56,986 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 22:24:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:24:58,561 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-03-31 22:24:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:24:58,563 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 22:24:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:24:58,581 INFO L225 Difference]: With dead ends: 1393 [2023-03-31 22:24:58,582 INFO L226 Difference]: Without dead ends: 921 [2023-03-31 22:24:58,588 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 22:24:58,593 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:24:58,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:24:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-03-31 22:24:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-03-31 22:24:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 22:24:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-03-31 22:24:58,662 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-03-31 22:24:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:24:58,662 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-03-31 22:24:58,662 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 22:24:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-03-31 22:24:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:24:58,663 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:24:58,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:24:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:24:58,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:24:58,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:24:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1167398618, now seen corresponding path program 1 times [2023-03-31 22:24:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:24:58,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722750825] [2023-03-31 22:24:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:24:58,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:24:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:24:58,798 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 22:24:58,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:24:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722750825] [2023-03-31 22:24:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722750825] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:24:58,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:24:58,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:24:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984698162] [2023-03-31 22:24:58,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:24:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:24:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:24:58,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:24:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:24:58,800 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22:25:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:25:01,220 INFO L93 Difference]: Finished difference Result 2795 states and 4544 transitions. [2023-03-31 22:25:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:25:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-03-31 22:25:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:25:01,231 INFO L225 Difference]: With dead ends: 2795 [2023-03-31 22:25:01,231 INFO L226 Difference]: Without dead ends: 1881 [2023-03-31 22:25:01,237 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 22:25:01,239 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1520 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:25:01,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 94 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-31 22:25:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-03-31 22:25:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843. [2023-03-31 22:25:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-03-31 22:25:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions. [2023-03-31 22:25:01,294 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22 [2023-03-31 22:25:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:25:01,294 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions. [2023-03-31 22:25:01,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22:25:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions. [2023-03-31 22:25:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 22:25:01,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:25:01,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:25:01,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:25:01,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:25:01,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:25:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1950699656, now seen corresponding path program 1 times [2023-03-31 22:25:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:25:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166653942] [2023-03-31 22:25:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:25:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:25:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:25:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:25:01,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:25:01,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166653942] [2023-03-31 22:25:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166653942] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:25:01,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430964017] [2023-03-31 22:25:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:25:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:25:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:25:01,444 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 22:25:01,446 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 22:25:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:25:01,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:25:01,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:25:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:25:01,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:25:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430964017] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:25:01,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:25:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:25:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553630458] [2023-03-31 22:25:01,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:25:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:25:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:25:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:25:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:25:01,650 INFO L87 Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-31 22:25:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:25:04,013 INFO L93 Difference]: Finished difference Result 5615 states and 8140 transitions. [2023-03-31 22:25:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:25:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 32 [2023-03-31 22:25:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:25:04,024 INFO L225 Difference]: With dead ends: 5615 [2023-03-31 22:25:04,024 INFO L226 Difference]: Without dead ends: 3777 [2023-03-31 22:25:04,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:25:04,028 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:25:04,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 22:25:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-03-31 22:25:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-03-31 22:25:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-03-31 22:25:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions. [2023-03-31 22:25:04,092 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32 [2023-03-31 22:25:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:25:04,092 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions. [2023-03-31 22:25:04,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-31 22:25:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions. [2023-03-31 22:25:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 22:25:04,094 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:25:04,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:25:04,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:25:04,299 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 [2023-03-31 22:25:04,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:25:04,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:25:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1133085012, now seen corresponding path program 1 times [2023-03-31 22:25:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:25:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761794990] [2023-03-31 22:25:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:25:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:25:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:25:04,487 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 22:25:04,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:25:04,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761794990] [2023-03-31 22:25:04,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761794990] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:25:04,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592848270] [2023-03-31 22:25:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:25:04,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:25:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:25:04,503 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) [2023-03-31 22:25:04,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:25:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:25:04,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:25:04,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:25:04,635 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 22:25:04,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:25:04,717 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 22:25:04,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592848270] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:25:04,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92731974] [2023-03-31 22:25:04,734 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-03-31 22:25:04,734 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:25:04,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:25:04,740 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:25:04,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:25:04,843 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-03-31 22:25:04,973 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2023-03-31 22:25:05,210 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-03-31 22:25:05,750 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 45 for LOIs [2023-03-31 22:25:05,834 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2023-03-31 22:25:06,379 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-03-31 22:25:06,542 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25200 conjuctions. This might take some time... [2023-03-31 22:25:09,535 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1224 conjuctions. [2023-03-31 22:25:51,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2023-03-31 22:25:51,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:25:54,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [92731974] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:25:54,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:25:54,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5, 5] total 20 [2023-03-31 22:25:54,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500581863] [2023-03-31 22:25:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:25:54,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:25:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:25:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:25:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-03-31 22:25:54,557 INFO L87 Difference]: Start difference. First operand 3658 states and 4698 transitions. Second operand has 13 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)