/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/Problem19_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:30:32,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:30:32,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:30:32,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:30:32,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:30:32,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:30:32,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:30:32,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:30:32,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:30:32,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:30:32,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:30:32,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:30:32,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:30:32,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:30:32,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:30:32,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:30:32,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:30:32,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:30:32,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:30:32,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:30:32,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:30:32,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:30:32,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:30:32,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:30:32,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:30:32,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:30:32,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:30:32,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:30:32,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:30:32,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:30:32,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:30:32,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:30:32,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:30:32,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:30:32,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:30:32,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:30:32,174 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 04:30:32,192 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:30:32,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:30:32,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:30:32,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:30:32,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:30:32,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:30:32,194 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:30:32,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:30:32,194 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:30:32,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:30:32,195 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:30:32,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:30:32,195 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:30:32,195 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:30:32,196 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:30:32,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:30:32,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:30:32,196 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:30:32,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:30:32,197 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:30:32,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:30:32,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:30:32,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:30:32,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:30:32,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:30:32,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:30:32,199 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:30:32,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:30:32,199 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:30:32,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:30:32,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:30:32,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:30:32,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:32,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:30:32,200 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:30:32,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:30:32,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:30:32,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:30:32,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:30:32,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:30:32,487 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:30:32,488 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:30:32,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-04-01 04:30:33,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:30:34,260 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:30:34,261 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-04-01 04:30:34,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c91b6de16/f7e47c3dce634ccaba74934be8491159/FLAG9dd88da99 [2023-04-01 04:30:34,325 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c91b6de16/f7e47c3dce634ccaba74934be8491159 [2023-04-01 04:30:34,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:30:34,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:30:34,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:34,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:30:34,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:30:34,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:34" (1/1) ... [2023-04-01 04:30:34,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6191bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:34, skipping insertion in model container [2023-04-01 04:30:34,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:34" (1/1) ... [2023-04-01 04:30:34,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:30:34,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:30:34,846 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label16.c[6966,6979] [2023-04-01 04:30:36,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:36,060 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:30:36,088 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/Problem19_label16.c[6966,6979] [2023-04-01 04:30:36,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:36,773 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:30:36,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36 WrapperNode [2023-04-01 04:30:36,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:36,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:30:36,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:30:36,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:30:36,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:36,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:36,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:36,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:30:37,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:30:37,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:30:37,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:30:37,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (1/1) ... [2023-04-01 04:30:37,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:30:37,334 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 04:30:37,348 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 04:30:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:30:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:30:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:30:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:30:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:30:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:30:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:30:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:30:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:30:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:30:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:30:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:30:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:30:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:30:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:30:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:30:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:30:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:30:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:30:37,450 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:30:37,452 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:30:44,782 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:59,630 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:59,630 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:59,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:59 BoogieIcfgContainer [2023-04-01 04:30:59,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:59,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:59,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:59,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:30:34" (1/3) ... [2023-04-01 04:30:59,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76517a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:59, skipping insertion in model container [2023-04-01 04:30:59,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:36" (2/3) ... [2023-04-01 04:30:59,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76517a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:59, skipping insertion in model container [2023-04-01 04:30:59,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:59" (3/3) ... [2023-04-01 04:30:59,642 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label16.c [2023-04-01 04:30:59,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:59,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:59,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:59,731 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;@5ae593a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:59,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:30:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:59,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:59,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:59,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:59,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1235903971, now seen corresponding path program 1 times [2023-04-01 04:30:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139699037] [2023-04-01 04:30:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:00,150 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 04:31:00,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139699037] [2023-04-01 04:31:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139699037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:31:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970066873] [2023-04-01 04:31:00,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:00,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:31:00,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:31:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:31:00,194 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 04:31:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:06,437 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:31:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:31:06,441 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 04:31:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:06,472 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:31:06,472 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:31:06,483 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 04:31:06,488 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:06,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 04:31:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:31:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:31:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:31:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 04:31:06,632 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 04:31:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:06,633 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 04:31:06,633 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 04:31:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 04:31:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:31:06,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:06,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:31:06,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:31:06,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:06,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash 606602702, now seen corresponding path program 1 times [2023-04-01 04:31:06,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703151246] [2023-04-01 04:31:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:06,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:06,876 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 04:31:06,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703151246] [2023-04-01 04:31:06,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703151246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:06,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:06,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787515902] [2023-04-01 04:31:06,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:06,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:06,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:06,880 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:31:17,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:31:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:17,193 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 04:31:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:31:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:17,223 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 04:31:17,223 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 04:31:17,228 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 04:31:17,229 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6592 mSolverCounterSat, 1794 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6592 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:17,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6592 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-04-01 04:31:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 04:31:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 04:31:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 04:31:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 04:31:17,378 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 04:31:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:17,379 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 04:31:17,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:31:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 04:31:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:31:17,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:17,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:31:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:31:17,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:17,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -35254791, now seen corresponding path program 1 times [2023-04-01 04:31:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887340191] [2023-04-01 04:31:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:17,573 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 04:31:17,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887340191] [2023-04-01 04:31:17,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887340191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:17,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:17,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560030042] [2023-04-01 04:31:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:17,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:17,581 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:24,515 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 04:31:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:31:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:31:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:24,565 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 04:31:24,566 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 04:31:24,579 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 04:31:24,581 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:24,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 04:31:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 04:31:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 04:31:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 04:31:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-04-01 04:31:24,813 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-04-01 04:31:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:24,814 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-04-01 04:31:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-04-01 04:31:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:31:24,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:24,815 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] [2023-04-01 04:31:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:31:24,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:24,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash 690383599, now seen corresponding path program 1 times [2023-04-01 04:31:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387263342] [2023-04-01 04:31:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:24,967 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 04:31:24,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387263342] [2023-04-01 04:31:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387263342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811630831] [2023-04-01 04:31:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:24,970 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)