/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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:30:09,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:30:09,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:30:09,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:30:09,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:30:09,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:30:09,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:30:09,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:30:09,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:30:09,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:30:09,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:30:09,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:30:09,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:30:09,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:30:09,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:30:09,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:30:09,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:30:09,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:30:09,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:30:09,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:30:09,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:30:09,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:30:09,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:30:09,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:30:09,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:30:09,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:30:09,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:30:09,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:30:09,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:30:09,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:30:09,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:30:09,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:30:09,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:30:09,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:30:09,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:30:09,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:30:09,382 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 04:30:09,400 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:30:09,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:30:09,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:30:09,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:30:09,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:30:09,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:30:09,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:30:09,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:30:09,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:30:09,403 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:30:09,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:30:09,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:30:09,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:30:09,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:30:09,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:30:09,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:30:09,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:30:09,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:30:09,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:30:09,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:30:09,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:30:09,405 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:30:09,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:30:09,406 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:30:09,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:30:09,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:30:09,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:30:09,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:09,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:30:09,406 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:30:09,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:30:09,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:30:09,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:30:09,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:30:09,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:30:09,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:30:09,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:30:09,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:30:09,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:30:09,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:30:09,653 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:30:09,654 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:30:09,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-04-01 04:30:10,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:30:11,252 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:30:11,253 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-04-01 04:30:11,285 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c346560/fe7a7194e33a446094621b770e932a7c/FLAGc9941f6d4 [2023-04-01 04:30:11,294 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c346560/fe7a7194e33a446094621b770e932a7c [2023-04-01 04:30:11,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:30:11,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:30:11,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:11,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:30:11,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:30:11,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:11" (1/1) ... [2023-04-01 04:30:11,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f80348a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:11, skipping insertion in model container [2023-04-01 04:30:11,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:11" (1/1) ... [2023-04-01 04:30:11,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:30:11,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:30:11,656 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_label09.c[6533,6546] [2023-04-01 04:30:12,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:12,572 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:30:12,598 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_label09.c[6533,6546] [2023-04-01 04:30:13,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:13,174 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:30:13,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13 WrapperNode [2023-04-01 04:30:13,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:13,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:30:13,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:30:13,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:30:13,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:30:13,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:30:13,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:30:13,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:30:13,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:30:13,507 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 04:30:13,512 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 04:30:13,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:30:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:30:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:30:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:30:13,698 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:30:13,700 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:30:19,963 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:34,351 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:34,351 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:34,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:34 BoogieIcfgContainer [2023-04-01 04:30:34,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:34,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:34,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:34,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:34,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:30:11" (1/3) ... [2023-04-01 04:30:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9f9939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:34, skipping insertion in model container [2023-04-01 04:30:34,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (2/3) ... [2023-04-01 04:30:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9f9939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:34, skipping insertion in model container [2023-04-01 04:30:34,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:34" (3/3) ... [2023-04-01 04:30:34,371 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label09.c [2023-04-01 04:30:34,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:34,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:34,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:34,448 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;@c79bcd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:34,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:34,457 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 04:30:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:34,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:34,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:34,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:34,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1235902947, now seen corresponding path program 1 times [2023-04-01 04:30:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:34,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983746343] [2023-04-01 04:30:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:34,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:34,798 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 04:30:34,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983746343] [2023-04-01 04:30:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983746343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:34,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:30:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680954913] [2023-04-01 04:30:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:30:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:30:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:34,823 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 04:30:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:39,927 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:30:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:30:39,931 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 04:30:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:39,969 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:30:39,969 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:30:39,978 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 04:30:39,984 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1159 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:39,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 156 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 04:30:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:30:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2229. [2023-04-01 04:30:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2203 states have (on average 1.9450748978665455) internal successors, (4285), 2203 states have internal predecessors, (4285), 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 04:30:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4320 transitions. [2023-04-01 04:30:40,117 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4320 transitions. Word has length 11 [2023-04-01 04:30:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:40,117 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4320 transitions. [2023-04-01 04:30:40,118 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 04:30:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4320 transitions. [2023-04-01 04:30:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:30:40,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:40,119 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] [2023-04-01 04:30:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:30:40,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:40,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1174825888, now seen corresponding path program 1 times [2023-04-01 04:30:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945221988] [2023-04-01 04:30:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:40,302 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 04:30:40,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:40,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945221988] [2023-04-01 04:30:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945221988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:40,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246731467] [2023-04-01 04:30:40,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:40,307 INFO L87 Difference]: Start difference. First operand 2229 states and 4320 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:30:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:46,881 INFO L93 Difference]: Finished difference Result 6761 states and 13161 transitions. [2023-04-01 04:30:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:30:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:46,920 INFO L225 Difference]: With dead ends: 6761 [2023-04-01 04:30:46,920 INFO L226 Difference]: Without dead ends: 4537 [2023-04-01 04:30:46,927 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 04:30:46,929 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3858 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:46,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 143 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 04:30:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2023-04-01 04:30:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4490. [2023-04-01 04:30:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4427 states have (on average 1.8599503049469166) internal successors, (8234), 4431 states have internal predecessors, (8234), 23 states have call successors, (23), 23 states have call predecessors, (23), 39 states have return successors, (116), 35 states have call predecessors, (116), 22 states have call successors, (116) [2023-04-01 04:30:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 8373 transitions. [2023-04-01 04:30:47,052 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 8373 transitions. Word has length 25 [2023-04-01 04:30:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:47,052 INFO L495 AbstractCegarLoop]: Abstraction has 4490 states and 8373 transitions. [2023-04-01 04:30:47,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:30:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 8373 transitions. [2023-04-01 04:30:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:30:47,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:47,053 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] [2023-04-01 04:30:47,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:30:47,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:47,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1691906840, now seen corresponding path program 1 times [2023-04-01 04:30:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321745616] [2023-04-01 04:30:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:47,193 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 04:30:47,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:47,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321745616] [2023-04-01 04:30:47,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321745616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:47,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:47,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:47,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371333727] [2023-04-01 04:30:47,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:47,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:47,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:47,196 INFO L87 Difference]: Start difference. First operand 4490 states and 8373 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 04:30:54,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:30:54,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:54,498 INFO L93 Difference]: Finished difference Result 12484 states and 23499 transitions. [2023-04-01 04:30:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 04:30:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:54,522 INFO L225 Difference]: With dead ends: 12484 [2023-04-01 04:30:54,522 INFO L226 Difference]: Without dead ends: 7999 [2023-04-01 04:30:54,528 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 04:30:54,529 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3880 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:54,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3880 Valid, 147 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 04:30:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2023-04-01 04:30:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7941. [2023-04-01 04:30:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7809 states have (on average 1.7496478422333206) internal successors, (13663), 7821 states have internal predecessors, (13663), 38 states have call successors, (38), 38 states have call predecessors, (38), 93 states have return successors, (414), 81 states have call predecessors, (414), 37 states have call successors, (414) [2023-04-01 04:30:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 14115 transitions. [2023-04-01 04:30:54,774 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 14115 transitions. Word has length 28 [2023-04-01 04:30:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:54,774 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 14115 transitions. [2023-04-01 04:30:54,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 04:30:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 14115 transitions. [2023-04-01 04:30:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:30:54,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:54,775 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] [2023-04-01 04:30:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:30:54,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:54,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1113308248, now seen corresponding path program 1 times [2023-04-01 04:30:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053259843] [2023-04-01 04:30:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:54,912 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 04:30:54,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053259843] [2023-04-01 04:30:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053259843] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:54,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:54,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721504789] [2023-04-01 04:30:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:54,915 INFO L87 Difference]: Start difference. First operand 7941 states and 14115 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:31:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:02,014 INFO L93 Difference]: Finished difference Result 23274 states and 42279 transitions. [2023-04-01 04:31:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 04:31:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:02,060 INFO L225 Difference]: With dead ends: 23274 [2023-04-01 04:31:02,060 INFO L226 Difference]: Without dead ends: 15338 [2023-04-01 04:31:02,072 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 04:31:02,073 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3797 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 6873 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 8612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:02,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3797 Valid, 180 Invalid, 8612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6873 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 04:31:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15338 states. [2023-04-01 04:31:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15338 to 15003. [2023-04-01 04:31:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 14651 states have (on average 1.5081564398334584) internal successors, (22096), 14701 states have internal predecessors, (22096), 68 states have call successors, (68), 68 states have call predecessors, (68), 283 states have return successors, (1704), 233 states have call predecessors, (1704), 67 states have call successors, (1704) [2023-04-01 04:31:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 23868 transitions. [2023-04-01 04:31:02,383 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 23868 transitions. Word has length 29 [2023-04-01 04:31:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:02,383 INFO L495 AbstractCegarLoop]: Abstraction has 15003 states and 23868 transitions. [2023-04-01 04:31:02,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:31:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 23868 transitions. [2023-04-01 04:31:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 04:31:02,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:02,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:31:02,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:31:02,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:02,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2093340410, now seen corresponding path program 1 times [2023-04-01 04:31:02,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:02,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364234824] [2023-04-01 04:31:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:02,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:31:02,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364234824] [2023-04-01 04:31:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364234824] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:31:02,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778993327] [2023-04-01 04:31:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:02,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:31:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:31:02,563 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 04:31:02,582 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 04:31:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:02,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:31:02,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:31:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:31:02,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:31:02,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778993327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:02,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:31:02,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 04:31:02,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624533218] [2023-04-01 04:31:02,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:02,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:02,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:31:02,739 INFO L87 Difference]: Start difference. First operand 15003 states and 23868 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:31:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:09,970 INFO L93 Difference]: Finished difference Result 43738 states and 73529 transitions. [2023-04-01 04:31:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2023-04-01 04:31:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:10,069 INFO L225 Difference]: With dead ends: 43738 [2023-04-01 04:31:10,070 INFO L226 Difference]: Without dead ends: 28740 [2023-04-01 04:31:10,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:31:10,105 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4045 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 8385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2440 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:10,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4045 Valid, 155 Invalid, 8385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2440 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 04:31:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28740 states. [2023-04-01 04:31:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28740 to 26647. [2023-04-01 04:31:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 25827 states have (on average 1.3557904518527122) internal successors, (35016), 25973 states have internal predecessors, (35016), 117 states have call successors, (117), 117 states have call predecessors, (117), 702 states have return successors, (5303), 556 states have call predecessors, (5303), 116 states have call successors, (5303) [2023-04-01 04:31:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 40436 transitions. [2023-04-01 04:31:10,831 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 40436 transitions. Word has length 46 [2023-04-01 04:31:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:10,831 INFO L495 AbstractCegarLoop]: Abstraction has 26647 states and 40436 transitions. [2023-04-01 04:31:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:31:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 40436 transitions. [2023-04-01 04:31:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 04:31:10,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:10,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:31:10,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:31:11,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:31:11,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:11,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1247190407, now seen corresponding path program 1 times [2023-04-01 04:31:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:11,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180416635] [2023-04-01 04:31:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:11,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:31:11,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180416635] [2023-04-01 04:31:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180416635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:31:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648074573] [2023-04-01 04:31:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:11,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:31:11,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:31:11,202 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 04:31:11,203 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 04:31:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:11,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:31:11,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:31:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:31:11,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:31:11,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648074573] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:11,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:31:11,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 04:31:11,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053369163] [2023-04-01 04:31:11,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:11,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:11,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:31:11,336 INFO L87 Difference]: Start difference. First operand 26647 states and 40436 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)