/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:00:02,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:00:02,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:00:02,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:00:02,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:00:02,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:00:02,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:00:02,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:00:02,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:00:02,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:00:02,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:00:02,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:00:02,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:00:02,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:00:02,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:00:02,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:00:02,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:00:02,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:00:02,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:00:02,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:00:02,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:00:02,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:00:02,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:00:02,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:00:02,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:00:02,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:00:02,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:00:02,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:00:02,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:00:02,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:00:02,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:00:02,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:00:02,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:00:02,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:00:02,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:00:02,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:00:02,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:00:02,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:00:02,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:00:02,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:00:02,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:00:02,176 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 04:00:02,206 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:00:02,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:00:02,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:00:02,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:00:02,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:00:02,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:00:02,208 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:00:02,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:00:02,208 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:00:02,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:00:02,209 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:00:02,209 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:00:02,209 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:00:02,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:00:02,209 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:00:02,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:00:02,210 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:00:02,210 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:00:02,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:00:02,210 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:00:02,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:00:02,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:00:02,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:00:02,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:00:02,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:00:02,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:00:02,211 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:00:02,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:00:02,212 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:00:02,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:00:02,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:00:02,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:00:02,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:02,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:00:02,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:00:02,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:00:02,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:00:02,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:00:02,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:00:02,498 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:00:02,498 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:00:02,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label09.c [2023-04-01 04:00:03,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:00:04,178 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:00:04,178 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label09.c [2023-04-01 04:00:04,212 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2792ec9df/e2c802533f9845189daf1da8e3855914/FLAG53b63b3fe [2023-04-01 04:00:04,228 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2792ec9df/e2c802533f9845189daf1da8e3855914 [2023-04-01 04:00:04,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:00:04,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:00:04,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:04,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:00:04,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:00:04,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:04" (1/1) ... [2023-04-01 04:00:04,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce49fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:04, skipping insertion in model container [2023-04-01 04:00:04,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:04" (1/1) ... [2023-04-01 04:00:04,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:00:04,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:00:04,724 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/Problem12_label09.c[8109,8122] [2023-04-01 04:00:05,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:05,380 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:00:05,407 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/Problem12_label09.c[8109,8122] [2023-04-01 04:00:05,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:05,795 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:00:05,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05 WrapperNode [2023-04-01 04:00:05,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:05,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:00:05,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:00:05,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:00:05,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:05,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:05,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:05,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:05,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:05,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:06,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:06,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:06,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:00:06,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:00:06,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:00:06,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:00:06,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (1/1) ... [2023-04-01 04:00:06,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:06,130 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 04:00:06,155 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 04:00:06,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:00:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:00:06,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:00:06,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:00:06,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:00:06,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:00:06,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:00:06,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:00:06,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:00:06,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:00:06,258 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:00:06,260 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:00:10,291 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:00:10,943 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:00:10,943 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:00:10,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:10 BoogieIcfgContainer [2023-04-01 04:00:10,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:00:10,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:00:10,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:00:10,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:00:10,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:00:04" (1/3) ... [2023-04-01 04:00:10,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d071c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:10, skipping insertion in model container [2023-04-01 04:00:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:05" (2/3) ... [2023-04-01 04:00:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d071c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:10, skipping insertion in model container [2023-04-01 04:00:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:10" (3/3) ... [2023-04-01 04:00:10,955 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label09.c [2023-04-01 04:00:10,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:00:10,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:00:11,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:00:11,048 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;@1978bb43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:00:11,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:00:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:00:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:00:11,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:11,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:11,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:11,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:11,070 INFO L85 PathProgramCache]: Analyzing trace with hash 832866278, now seen corresponding path program 1 times [2023-04-01 04:00:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:11,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843670549] [2023-04-01 04:00:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:11,443 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 04:00:11,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843670549] [2023-04-01 04:00:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843670549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:11,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:00:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896307055] [2023-04-01 04:00:11,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:11,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:00:11,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:00:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:00:11,489 INFO L87 Difference]: Start difference. First operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-04-01 04:00:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:14,760 INFO L93 Difference]: Finished difference Result 2065 states and 4062 transitions. [2023-04-01 04:00:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:00:14,769 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 [2023-04-01 04:00:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:14,794 INFO L225 Difference]: With dead ends: 2065 [2023-04-01 04:00:14,794 INFO L226 Difference]: Without dead ends: 1369 [2023-04-01 04:00:14,804 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 04:00:14,813 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 724 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:14,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 498 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:00:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2023-04-01 04:00:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1366. [2023-04-01 04:00:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1348 states have (on average 1.6520771513353116) internal successors, (2227), 1348 states have internal predecessors, (2227), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:00:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2250 transitions. [2023-04-01 04:00:14,942 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2250 transitions. Word has length 11 [2023-04-01 04:00:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 2250 transitions. [2023-04-01 04:00:14,943 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) [2023-04-01 04:00:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2250 transitions. [2023-04-01 04:00:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:00:14,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:14,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:14,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:00:14,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:14,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash 868638377, now seen corresponding path program 1 times [2023-04-01 04:00:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251170999] [2023-04-01 04:00:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:15,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:15,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251170999] [2023-04-01 04:00:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251170999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:15,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:15,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116430960] [2023-04-01 04:00:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:15,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:15,157 INFO L87 Difference]: Start difference. First operand 1366 states and 2250 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:00:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:19,568 INFO L93 Difference]: Finished difference Result 4142 states and 6849 transitions. [2023-04-01 04:00:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:00:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 04:00:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:19,593 INFO L225 Difference]: With dead ends: 4142 [2023-04-01 04:00:19,594 INFO L226 Difference]: Without dead ends: 2781 [2023-04-01 04:00:19,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:00:19,607 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2644 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:19,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2644 Valid, 89 Invalid, 4868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 04:00:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2023-04-01 04:00:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2752. [2023-04-01 04:00:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2710 states have (on average 1.4904059040590405) internal successors, (4039), 2714 states have internal predecessors, (4039), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 04:00:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 4116 transitions. [2023-04-01 04:00:19,769 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 4116 transitions. Word has length 30 [2023-04-01 04:00:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:19,770 INFO L495 AbstractCegarLoop]: Abstraction has 2752 states and 4116 transitions. [2023-04-01 04:00:19,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:00:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 4116 transitions. [2023-04-01 04:00:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 04:00:19,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:19,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:00:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:00:19,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:19,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -657697104, now seen corresponding path program 1 times [2023-04-01 04:00:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286214496] [2023-04-01 04:00:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:20,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286214496] [2023-04-01 04:00:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286214496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:20,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058715081] [2023-04-01 04:00:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:20,059 INFO L87 Difference]: Start difference. First operand 2752 states and 4116 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 04:00:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:24,148 INFO L93 Difference]: Finished difference Result 8405 states and 12801 transitions. [2023-04-01 04:00:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:00:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-04-01 04:00:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:24,173 INFO L225 Difference]: With dead ends: 8405 [2023-04-01 04:00:24,173 INFO L226 Difference]: Without dead ends: 5658 [2023-04-01 04:00:24,180 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 [2023-04-01 04:00:24,180 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2401 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3757 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:24,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2401 Valid, 100 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3757 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:00:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2023-04-01 04:00:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 5596. [2023-04-01 04:00:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5478 states have (on average 1.4286235852500913) internal successors, (7826), 5501 states have internal predecessors, (7826), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 04:00:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 8151 transitions. [2023-04-01 04:00:24,336 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 8151 transitions. Word has length 59 [2023-04-01 04:00:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:24,337 INFO L495 AbstractCegarLoop]: Abstraction has 5596 states and 8151 transitions. [2023-04-01 04:00:24,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 04:00:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 8151 transitions. [2023-04-01 04:00:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 04:00:24,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:24,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:24,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:00:24,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:24,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -948748173, now seen corresponding path program 1 times [2023-04-01 04:00:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:24,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437032976] [2023-04-01 04:00:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:00:24,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437032976] [2023-04-01 04:00:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437032976] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:00:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921706202] [2023-04-01 04:00:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:00:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:24,593 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 04:00:24,597 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 04:00:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:24,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:00:24,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:00:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:00:24,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:00:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921706202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:24,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:00:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:00:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842032257] [2023-04-01 04:00:24,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:00:24,910 INFO L87 Difference]: Start difference. First operand 5596 states and 8151 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 04:00:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:29,170 INFO L93 Difference]: Finished difference Result 16979 states and 25432 transitions. [2023-04-01 04:00:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:00:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 72 [2023-04-01 04:00:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:29,223 INFO L225 Difference]: With dead ends: 16979 [2023-04-01 04:00:29,224 INFO L226 Difference]: Without dead ends: 11388 [2023-04-01 04:00:29,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:00:29,246 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2204 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4590 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:29,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2204 Valid, 93 Invalid, 5571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4590 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 04:00:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2023-04-01 04:00:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 11300. [2023-04-01 04:00:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11015 states have (on average 1.3054925102133454) internal successors, (14380), 11083 states have internal predecessors, (14380), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 04:00:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 15516 transitions. [2023-04-01 04:00:29,629 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 15516 transitions. Word has length 72 [2023-04-01 04:00:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 11300 states and 15516 transitions. [2023-04-01 04:00:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 04:00:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 15516 transitions. [2023-04-01 04:00:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 04:00:29,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:29,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-04-01 04:00:29,644 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 04:00:29,838 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 04:00:29,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:29,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash -711281080, now seen corresponding path program 1 times [2023-04-01 04:00:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277031604] [2023-04-01 04:00:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 04:00:30,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277031604] [2023-04-01 04:00:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277031604] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:00:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817156323] [2023-04-01 04:00:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:00:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:30,061 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 04:00:30,064 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 04:00:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:30,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:00:30,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:00:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:00:30,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:00:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 04:00:30,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817156323] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:00:30,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095262789] [2023-04-01 04:00:30,531 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-01 04:00:30,531 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:00:30,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:00:30,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:00:30,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:00:30,687 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:00:30,938 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2023-04-01 04:00:41,936 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 76609 conjuctions. This might take some time... [2023-04-01 04:00:46,695 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 177 conjuctions.