/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/Problem15_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:14:15,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:14:15,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:14:15,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:14:15,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:14:15,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:14:15,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:14:15,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:14:15,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:14:15,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:14:15,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:14:15,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:14:15,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:14:15,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:14:15,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:14:15,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:14:15,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:14:15,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:14:15,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:14:15,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:14:15,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:14:15,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:14:15,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:14:15,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:14:15,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:14:15,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:14:15,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:14:15,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:14:15,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:14:15,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:14:15,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:14:15,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:14:15,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:14:15,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:14:15,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:14:15,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:14:15,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:14:15,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:14:15,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:14:15,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:14:15,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:14:15,253 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 04:14:15,269 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:14:15,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:14:15,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:14:15,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:14:15,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:14:15,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:14:15,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:14:15,271 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:14:15,272 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:14:15,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:14:15,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:14:15,272 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:14:15,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:14:15,273 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:14:15,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:14:15,274 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:14:15,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:14:15,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:14:15,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:14:15,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:14:15,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:14:15,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:14:15,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:14:15,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:14:15,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:14:15,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:14:15,507 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:14:15,510 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:14:15,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label27.c [2023-04-01 04:14:16,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:14:16,724 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:14:16,725 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label27.c [2023-04-01 04:14:16,743 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66583976/967b36ddcb014d9f92c44e61dd49d387/FLAGf19dc5cb2 [2023-04-01 04:14:16,756 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66583976/967b36ddcb014d9f92c44e61dd49d387 [2023-04-01 04:14:16,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:14:16,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:14:16,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:16,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:14:16,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:14:16,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:16" (1/1) ... [2023-04-01 04:14:16,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cab9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:16, skipping insertion in model container [2023-04-01 04:14:16,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:16" (1/1) ... [2023-04-01 04:14:16,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:14:16,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:14:16,990 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/Problem15_label27.c[4605,4618] [2023-04-01 04:14:17,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:17,267 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:14:17,279 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/Problem15_label27.c[4605,4618] [2023-04-01 04:14:17,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:17,443 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:14:17,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17 WrapperNode [2023-04-01 04:14:17,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:17,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:14:17,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:14:17,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:14:17,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:14:17,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:14:17,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:14:17,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:14:17,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (1/1) ... [2023-04-01 04:14:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:14:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:17,618 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 04:14:17,624 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 04:14:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:14:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:14:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:14:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:14:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:14:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:14:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:14:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:14:17,702 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:14:17,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:14:19,550 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:14:20,089 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:14:20,089 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:14:20,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:20 BoogieIcfgContainer [2023-04-01 04:14:20,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:14:20,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:14:20,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:14:20,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:14:20,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:14:16" (1/3) ... [2023-04-01 04:14:20,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa14f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:20, skipping insertion in model container [2023-04-01 04:14:20,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:17" (2/3) ... [2023-04-01 04:14:20,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa14f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:20, skipping insertion in model container [2023-04-01 04:14:20,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:20" (3/3) ... [2023-04-01 04:14:20,098 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label27.c [2023-04-01 04:14:20,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:14:20,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:14:20,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:14:20,151 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;@6de08a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:14:20,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:14:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:14:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:14:20,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:20,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:20,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:20,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash 468031140, now seen corresponding path program 1 times [2023-04-01 04:14:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701253557] [2023-04-01 04:14:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:20,428 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 04:14:20,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:20,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701253557] [2023-04-01 04:14:20,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701253557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:20,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:20,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799675895] [2023-04-01 04:14:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:20,464 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:14:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:21,725 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-04-01 04:14:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:21,728 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 04:14:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:21,737 INFO L225 Difference]: With dead ends: 720 [2023-04-01 04:14:21,737 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 04:14:21,741 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 04:14:21,745 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:21,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:14:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 04:14:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-04-01 04:14:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 04:14:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-04-01 04:14:21,818 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-04-01 04:14:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:21,818 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-04-01 04:14:21,819 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 04:14:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-04-01 04:14:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:14:21,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:21,821 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] [2023-04-01 04:14:21,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:14:21,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:21,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1863029459, now seen corresponding path program 1 times [2023-04-01 04:14:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:21,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95465709] [2023-04-01 04:14:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:22,004 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 04:14:22,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:22,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95465709] [2023-04-01 04:14:22,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95465709] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:22,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:22,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512990897] [2023-04-01 04:14:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:22,007 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:14:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:24,441 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-04-01 04:14:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 04:14:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:24,445 INFO L225 Difference]: With dead ends: 1426 [2023-04-01 04:14:24,446 INFO L226 Difference]: Without dead ends: 958 [2023-04-01 04:14:24,446 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 04:14:24,447 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 671 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:24,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 55 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:14:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-04-01 04:14:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-04-01 04:14:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.4912663755458515) internal successors, (1366), 924 states have internal predecessors, (1366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 04:14:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1406 transitions. [2023-04-01 04:14:24,485 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1406 transitions. Word has length 31 [2023-04-01 04:14:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1406 transitions. [2023-04-01 04:14:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:14:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1406 transitions. [2023-04-01 04:14:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:14:24,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:24,487 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] [2023-04-01 04:14:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:14:24,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:24,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 286805323, now seen corresponding path program 1 times [2023-04-01 04:14:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:24,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327715000] [2023-04-01 04:14:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:24,628 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 04:14:24,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327715000] [2023-04-01 04:14:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327715000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:24,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:24,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248149815] [2023-04-01 04:14:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:24,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:24,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:24,630 INFO L87 Difference]: Start difference. First operand 940 states and 1406 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:14:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:26,608 INFO L93 Difference]: Finished difference Result 2858 states and 4368 transitions. [2023-04-01 04:14:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 04:14:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:26,615 INFO L225 Difference]: With dead ends: 2858 [2023-04-01 04:14:26,615 INFO L226 Difference]: Without dead ends: 1923 [2023-04-01 04:14:26,616 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 04:14:26,617 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:26,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:14:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-04-01 04:14:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-04-01 04:14:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3422029702970297) internal successors, (2169), 1640 states have internal predecessors, (2169), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-01 04:14:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2264 transitions. [2023-04-01 04:14:26,655 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2264 transitions. Word has length 35 [2023-04-01 04:14:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:26,655 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2264 transitions. [2023-04-01 04:14:26,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:14:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2264 transitions. [2023-04-01 04:14:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:14:26,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:26,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:26,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:14:26,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:26,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1044205770, now seen corresponding path program 1 times [2023-04-01 04:14:26,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:26,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170155878] [2023-04-01 04:14:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:26,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:14:27,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:27,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170155878] [2023-04-01 04:14:27,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170155878] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:27,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840003644] [2023-04-01 04:14:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:27,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:27,030 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 04:14:27,038 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 04:14:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:27,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:14:27,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:14:27,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:14:27,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840003644] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:27,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:14:27,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-01 04:14:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051118535] [2023-04-01 04:14:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:14:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:14:27,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:14:27,904 INFO L87 Difference]: Start difference. First operand 1666 states and 2264 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:29,557 INFO L93 Difference]: Finished difference Result 4736 states and 6584 transitions. [2023-04-01 04:14:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:14:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2023-04-01 04:14:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:29,569 INFO L225 Difference]: With dead ends: 4736 [2023-04-01 04:14:29,569 INFO L226 Difference]: Without dead ends: 3075 [2023-04-01 04:14:29,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:14:29,575 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 354 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:29,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 35 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:14:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2023-04-01 04:14:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2359. [2023-04-01 04:14:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2288 states have (on average 1.3273601398601398) internal successors, (3037), 2323 states have internal predecessors, (3037), 18 states have call successors, (18), 18 states have call predecessors, (18), 52 states have return successors, (199), 17 states have call predecessors, (199), 17 states have call successors, (199) [2023-04-01 04:14:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3254 transitions. [2023-04-01 04:14:29,655 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3254 transitions. Word has length 152 [2023-04-01 04:14:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 3254 transitions. [2023-04-01 04:14:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3254 transitions. [2023-04-01 04:14:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 04:14:29,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:29,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:29,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:14:29,865 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 04:14:29,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:29,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1092471245, now seen corresponding path program 1 times [2023-04-01 04:14:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402817087] [2023-04-01 04:14:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 04:14:30,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402817087] [2023-04-01 04:14:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402817087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:30,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:30,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140237963] [2023-04-01 04:14:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:30,075 INFO L87 Difference]: Start difference. First operand 2359 states and 3254 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:14:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:31,415 INFO L93 Difference]: Finished difference Result 5879 states and 8446 transitions. [2023-04-01 04:14:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 04:14:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:31,432 INFO L225 Difference]: With dead ends: 5879 [2023-04-01 04:14:31,432 INFO L226 Difference]: Without dead ends: 3525 [2023-04-01 04:14:31,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:31,441 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:31,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:14:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2023-04-01 04:14:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3309. [2023-04-01 04:14:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3222 states have (on average 1.26536312849162) internal successors, (4077), 3263 states have internal predecessors, (4077), 23 states have call successors, (23), 23 states have call predecessors, (23), 63 states have return successors, (301), 22 states have call predecessors, (301), 22 states have call successors, (301) [2023-04-01 04:14:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4401 transitions. [2023-04-01 04:14:31,517 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4401 transitions. Word has length 173 [2023-04-01 04:14:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:31,518 INFO L495 AbstractCegarLoop]: Abstraction has 3309 states and 4401 transitions. [2023-04-01 04:14:31,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:14:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4401 transitions. [2023-04-01 04:14:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 04:14:31,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:31,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:31,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:14:31,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:31,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1124624203, now seen corresponding path program 1 times [2023-04-01 04:14:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695434982] [2023-04-01 04:14:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:31,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:31,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:31,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695434982] [2023-04-01 04:14:31,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695434982] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:31,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099004577] [2023-04-01 04:14:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:31,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:31,716 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 04:14:31,718 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 04:14:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:31,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:14:31,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:31,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:31,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099004577] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:14:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220362750] [2023-04-01 04:14:31,983 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:14:31,983 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:14:31,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:14:31,991 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:14:31,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:14:32,134 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:14:32,361 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-04-01 04:14:34,643 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 54059 conjuctions. This might take some time... [2023-04-01 04:14:39,211 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1105 conjuctions. [2023-04-01 04:14:46,389 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30