/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:23:55,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:23:55,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:23:55,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:23:55,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:23:55,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:23:55,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:23:55,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:23:55,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:23:55,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:23:55,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:23:55,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:23:55,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:23:55,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:23:55,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:23:55,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:23:55,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:23:55,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:23:55,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:23:55,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:23:55,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:23:55,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:23:55,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:23:55,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:23:55,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:23:55,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:23:55,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:23:55,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:23:55,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:23:55,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:23:55,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:23:55,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:23:55,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:23:55,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:23:55,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:23:55,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:23:55,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:23:55,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:23:55,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:23:55,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:23:55,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:23:55,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:23:55,185 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:23:55,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:23:55,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:23:55,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:23:55,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:23:55,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:23:55,186 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:23:55,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:23:55,186 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:23:55,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:23:55,187 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:23:55,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:23:55,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:23:55,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:23:55,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:23:55,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:23:55,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:23:55,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:23:55,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:23:55,377 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:23:55,377 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:23:55,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-04-01 09:23:56,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:23:56,735 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:23:56,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-04-01 09:23:56,753 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0397f784b/fe67ab31cbae489895107f0c5ed70107/FLAGb190bfd2a [2023-04-01 09:23:56,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0397f784b/fe67ab31cbae489895107f0c5ed70107 [2023-04-01 09:23:56,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:23:56,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:23:56,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:23:56,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:23:56,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:23:56,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:23:56" (1/1) ... [2023-04-01 09:23:56,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cebac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:56, skipping insertion in model container [2023-04-01 09:23:56,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:23:56" (1/1) ... [2023-04-01 09:23:56,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:23:56,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:23:57,182 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-04-01 09:23:57,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:23:57,221 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:23:57,356 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-04-01 09:23:57,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:23:57,384 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:23:57,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57 WrapperNode [2023-04-01 09:23:57,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:23:57,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:23:57,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:23:57,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:23:57,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:23:57,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:23:57,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:23:57,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:23:57,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (1/1) ... [2023-04-01 09:23:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:23:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:23:57,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:23:57,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:23:57,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:23:57,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:23:57,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:23:57,538 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:23:57,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:23:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:23:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:23:57,608 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:23:57,609 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:23:58,860 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:23:59,026 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:23:59,027 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:23:59,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:23:59 BoogieIcfgContainer [2023-04-01 09:23:59,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:23:59,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:23:59,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:23:59,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:23:59,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:23:56" (1/3) ... [2023-04-01 09:23:59,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7564e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:23:59, skipping insertion in model container [2023-04-01 09:23:59,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:23:57" (2/3) ... [2023-04-01 09:23:59,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7564e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:23:59, skipping insertion in model container [2023-04-01 09:23:59,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:23:59" (3/3) ... [2023-04-01 09:23:59,035 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2023-04-01 09:23:59,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:23:59,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:23:59,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:23:59,085 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;@67e6991b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:23:59,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:23:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:23:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:23:59,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:59,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:59,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:59,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 597484356, now seen corresponding path program 1 times [2023-04-01 09:23:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218212134] [2023-04-01 09:23:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:23:59,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:59,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218212134] [2023-04-01 09:23:59,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218212134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:59,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:23:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80246589] [2023-04-01 09:23:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:23:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:23:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:23:59,982 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:24:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:00,615 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:24:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-01 09:24:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:00,627 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:24:00,627 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:24:00,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:24:00,631 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:00,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:24:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:24:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:24:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8907849829351535) internal successors, (554), 293 states have internal predecessors, (554), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:24:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-04-01 09:24:00,726 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-04-01 09:24:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:00,726 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-04-01 09:24:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:24:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-04-01 09:24:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:24:00,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:00,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:24:00,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:24:00,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:00,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 15659006, now seen corresponding path program 1 times [2023-04-01 09:24:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617981444] [2023-04-01 09:24:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:01,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617981444] [2023-04-01 09:24:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617981444] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:01,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762837672] [2023-04-01 09:24:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:01,082 INFO L87 Difference]: Start difference. First operand 301 states and 563 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:24:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:01,405 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-04-01 09:24:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:24:01,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2023-04-01 09:24:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:01,415 INFO L225 Difference]: With dead ends: 911 [2023-04-01 09:24:01,415 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 09:24:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:24:01,421 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:01,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:24:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 09:24:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-04-01 09:24:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.879045996592845) internal successors, (1103), 591 states have internal predecessors, (1103), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 09:24:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 09:24:01,463 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 09:24:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:01,464 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 09:24:01,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:24:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 09:24:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 09:24:01,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:01,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:24:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:24:01,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:01,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1985049242, now seen corresponding path program 1 times [2023-04-01 09:24:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827247979] [2023-04-01 09:24:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:01,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827247979] [2023-04-01 09:24:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827247979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:01,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:24:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547305591] [2023-04-01 09:24:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:24:01,746 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-04-01 09:24:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:02,223 INFO L93 Difference]: Finished difference Result 1797 states and 3447 transitions. [2023-04-01 09:24:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 160 [2023-04-01 09:24:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:02,231 INFO L225 Difference]: With dead ends: 1797 [2023-04-01 09:24:02,231 INFO L226 Difference]: Without dead ends: 1199 [2023-04-01 09:24:02,232 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 [2023-04-01 09:24:02,237 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 37 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:02,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:24:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-04-01 09:24:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2023-04-01 09:24:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1171 states have (on average 1.7275832621690863) internal successors, (2023), 1179 states have internal predecessors, (2023), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (81), 9 states have call predecessors, (81), 9 states have call successors, (81) [2023-04-01 09:24:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 2114 transitions. [2023-04-01 09:24:02,287 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 2114 transitions. Word has length 160 [2023-04-01 09:24:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:02,287 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 2114 transitions. [2023-04-01 09:24:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-04-01 09:24:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 2114 transitions. [2023-04-01 09:24:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-01 09:24:02,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:02,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:24:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:24:02,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:02,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 555636756, now seen corresponding path program 1 times [2023-04-01 09:24:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958699539] [2023-04-01 09:24:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:02,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:24:02,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958699539] [2023-04-01 09:24:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958699539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172328679] [2023-04-01 09:24:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:02,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:02,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:02,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:24:02,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:24:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:02,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:24:02,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 09:24:02,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:24:02,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172328679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:02,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:24:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:24:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396141208] [2023-04-01 09:24:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:24:02,928 INFO L87 Difference]: Start difference. First operand 1199 states and 2114 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:24:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:03,725 INFO L93 Difference]: Finished difference Result 3651 states and 6695 transitions. [2023-04-01 09:24:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:24:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 175 [2023-04-01 09:24:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:03,747 INFO L225 Difference]: With dead ends: 3651 [2023-04-01 09:24:03,747 INFO L226 Difference]: Without dead ends: 2457 [2023-04-01 09:24:03,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:24:03,750 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 512 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:03,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 39 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:24:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2023-04-01 09:24:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2435. [2023-04-01 09:24:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2361 states have (on average 1.603134265141889) internal successors, (3785), 2399 states have internal predecessors, (3785), 18 states have call successors, (18), 18 states have call predecessors, (18), 55 states have return successors, (351), 17 states have call predecessors, (351), 17 states have call successors, (351) [2023-04-01 09:24:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 4154 transitions. [2023-04-01 09:24:03,838 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 4154 transitions. Word has length 175 [2023-04-01 09:24:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:03,839 INFO L495 AbstractCegarLoop]: Abstraction has 2435 states and 4154 transitions. [2023-04-01 09:24:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:24:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 4154 transitions. [2023-04-01 09:24:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-04-01 09:24:03,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:03,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:24:03,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:24:04,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:04,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:04,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1834321484, now seen corresponding path program 1 times [2023-04-01 09:24:04,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:04,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008228136] [2023-04-01 09:24:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 09:24:04,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:04,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008228136] [2023-04-01 09:24:04,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008228136] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:04,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708081824] [2023-04-01 09:24:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:04,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:04,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:24:04,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:24:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:04,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:24:04,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 09:24:04,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:24:04,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708081824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:04,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:24:04,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:24:04,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977869286] [2023-04-01 09:24:04,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:04,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:04,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:24:04,813 INFO L87 Difference]: Start difference. First operand 2435 states and 4154 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:24:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:05,343 INFO L93 Difference]: Finished difference Result 7259 states and 12778 transitions. [2023-04-01 09:24:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 187 [2023-04-01 09:24:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:05,366 INFO L225 Difference]: With dead ends: 7259 [2023-04-01 09:24:05,366 INFO L226 Difference]: Without dead ends: 4829 [2023-04-01 09:24:05,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:24:05,374 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:05,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:24:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2023-04-01 09:24:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4827. [2023-04-01 09:24:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4701 states have (on average 1.5862582429270369) internal successors, (7457), 4759 states have internal predecessors, (7457), 34 states have call successors, (34), 34 states have call predecessors, (34), 91 states have return successors, (993), 33 states have call predecessors, (993), 33 states have call successors, (993) [2023-04-01 09:24:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 8484 transitions. [2023-04-01 09:24:05,497 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 8484 transitions. Word has length 187 [2023-04-01 09:24:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:05,498 INFO L495 AbstractCegarLoop]: Abstraction has 4827 states and 8484 transitions. [2023-04-01 09:24:05,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:24:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 8484 transitions. [2023-04-01 09:24:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 09:24:05,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:05,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:24:05,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:24:05,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:05,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:05,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 519342225, now seen corresponding path program 1 times [2023-04-01 09:24:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:05,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594484817] [2023-04-01 09:24:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:24:06,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594484817] [2023-04-01 09:24:06,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594484817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446501002] [2023-04-01 09:24:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:06,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:06,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:24:06,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:24:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:06,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:24:06,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:06,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:24:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:06,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446501002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:24:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125151314] [2023-04-01 09:24:06,460 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:24:06,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:24:06,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:24:06,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:24:06,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:24:07,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs