/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/Problem13_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:35:24,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:35:24,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:35:24,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:35:24,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:35:24,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:35:24,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:35:24,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:35:24,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:35:24,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:35:24,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:35:24,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:35:24,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:35:24,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:35:24,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:35:24,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:35:24,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:35:24,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:35:24,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:35:24,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:35:24,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:35:24,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:35:24,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:35:24,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:35:24,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:35:24,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:35:24,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:35:24,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:35:24,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:35:24,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:35:24,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:35:24,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:35:24,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:35:24,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:35:24,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:35:24,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:35:24,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:35:24,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:35:24,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:35:24,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:35:24,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:35:24,311 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 [2023-04-02 19:35:24,330 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:35:24,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:35:24,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:35:24,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:35:24,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:35:24,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:35:24,331 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:35:24,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:35:24,332 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:35:24,332 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:35:24,332 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:35:24,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:35:24,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:35:24,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:35:24,333 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:35:24,333 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:35:24,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:35:24,334 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:35:24,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:35:24,334 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:35:24,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:35:24,336 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:35:24,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:35:24,336 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:35:24,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:35:24,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:35:24,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:35:24,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:35:24,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:35:24,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:35:24,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:35:24,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:35:24,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:35:24,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:35:24,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:35:24,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:35:24,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:35:24,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:35:24,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:35:24,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:35:24,572 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:35:24,572 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:35:24,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2023-04-02 19:35:25,821 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:35:26,252 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:35:26,253 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2023-04-02 19:35:26,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1987cfe21/d8555185a1b9479cadd2cc24e947187e/FLAG4b5056e6e [2023-04-02 19:35:26,303 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1987cfe21/d8555185a1b9479cadd2cc24e947187e [2023-04-02 19:35:26,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:35:26,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:35:26,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:35:26,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:35:26,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:35:26,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:35:26" (1/1) ... [2023-04-02 19:35:26,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ff7987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:26, skipping insertion in model container [2023-04-02 19:35:26,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:35:26" (1/1) ... [2023-04-02 19:35:26,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:35:26,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:35:26,715 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/Problem13_label57.c[8676,8689] [2023-04-02 19:35:27,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:35:27,484 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:35:27,511 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/Problem13_label57.c[8676,8689] [2023-04-02 19:35:27,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:35:27,947 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:35:27,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27 WrapperNode [2023-04-02 19:35:27,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:35:27,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:35:27,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:35:27,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:35:27,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:27,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,165 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:35:28,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:35:28,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:35:28,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:35:28,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (1/1) ... [2023-04-02 19:35:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:35:28,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:28,258 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) [2023-04-02 19:35:28,319 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 [2023-04-02 19:35:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:35:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:35:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:35:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:35:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:35:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:35:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:35:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:35:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:35:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:35:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:35:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:35:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:35:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:35:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:35:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:35:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:35:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:35:28,503 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:35:28,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:35:33,025 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:35:35,494 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:35:35,494 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:35:35,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:35:35 BoogieIcfgContainer [2023-04-02 19:35:35,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:35:35,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:35:35,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:35:35,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:35:35,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:35:26" (1/3) ... [2023-04-02 19:35:35,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a08cf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:35:35, skipping insertion in model container [2023-04-02 19:35:35,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:27" (2/3) ... [2023-04-02 19:35:35,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a08cf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:35:35, skipping insertion in model container [2023-04-02 19:35:35,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:35:35" (3/3) ... [2023-04-02 19:35:35,505 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label57.c [2023-04-02 19:35:35,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:35:35,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:35:35,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:35:35,580 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;@36b153e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:35:35,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:35:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:35:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:35:35,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:35,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:35,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:35,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash -330926028, now seen corresponding path program 1 times [2023-04-02 19:35:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:35,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330442881] [2023-04-02 19:35:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:35:35,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330442881] [2023-04-02 19:35:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330442881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:35,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:35,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:35:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411851109] [2023-04-02 19:35:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:35,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:35:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:35:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:35:36,037 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 19:35:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:39,504 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:35:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:35:39,509 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 [2023-04-02 19:35:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:39,529 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:35:39,529 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:35:39,538 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 [2023-04-02 19:35:39,541 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 753 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:39,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 158 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 19:35:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:35:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-02 19:35:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.8904515173945227) internal successors, (2554), 1351 states have internal predecessors, (2554), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:35:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2577 transitions. [2023-04-02 19:35:39,648 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2577 transitions. Word has length 11 [2023-04-02 19:35:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:39,648 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2577 transitions. [2023-04-02 19:35:39,649 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) [2023-04-02 19:35:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2577 transitions. [2023-04-02 19:35:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 19:35:39,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:39,650 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] [2023-04-02 19:35:39,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:35:39,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:39,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -975636319, now seen corresponding path program 1 times [2023-04-02 19:35:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671385076] [2023-04-02 19:35:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:35:39,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:39,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671385076] [2023-04-02 19:35:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671385076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:39,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:35:39,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079076107] [2023-04-02 19:35:39,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:39,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:39,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:39,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:35:39,827 INFO L87 Difference]: Start difference. First operand 1369 states and 2577 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) [2023-04-02 19:35:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:44,217 INFO L93 Difference]: Finished difference Result 4151 states and 7858 transitions. [2023-04-02 19:35:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:35:44,218 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 [2023-04-02 19:35:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:44,232 INFO L225 Difference]: With dead ends: 4151 [2023-04-02 19:35:44,233 INFO L226 Difference]: Without dead ends: 2787 [2023-04-02 19:35:44,237 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 [2023-04-02 19:35:44,238 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2615 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:44,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2615 Valid, 90 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-02 19:35:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2023-04-02 19:35:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2743. [2023-04-02 19:35:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2701 states have (on average 1.6864124398370974) internal successors, (4555), 2705 states have internal predecessors, (4555), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-02 19:35:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 4644 transitions. [2023-04-02 19:35:44,330 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 4644 transitions. Word has length 28 [2023-04-02 19:35:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:44,330 INFO L495 AbstractCegarLoop]: Abstraction has 2743 states and 4644 transitions. [2023-04-02 19:35:44,330 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) [2023-04-02 19:35:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 4644 transitions. [2023-04-02 19:35:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 19:35:44,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:44,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:35:44,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:44,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1139879510, now seen corresponding path program 1 times [2023-04-02 19:35:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628195965] [2023-04-02 19:35:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:35:44,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:44,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628195965] [2023-04-02 19:35:44,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628195965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498115675] [2023-04-02 19:35:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:44,665 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) [2023-04-02 19:35:44,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:35:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:44,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:35:44,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:35:44,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:35:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498115675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:44,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:35:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-02 19:35:44,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586806908] [2023-04-02 19:35:44,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:44,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 19:35:44,883 INFO L87 Difference]: Start difference. First operand 2743 states and 4644 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-04-02 19:35:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:49,015 INFO L93 Difference]: Finished difference Result 8414 states and 14569 transitions. [2023-04-02 19:35:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:35:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 44 [2023-04-02 19:35:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:49,052 INFO L225 Difference]: With dead ends: 8414 [2023-04-02 19:35:49,053 INFO L226 Difference]: Without dead ends: 5676 [2023-04-02 19:35:49,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:35:49,064 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2262 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3799 mSolverCounterSat, 1515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1515 IncrementalHoareTripleChecker+Valid, 3799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:49,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 95 Invalid, 5314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1515 Valid, 3799 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 19:35:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2023-04-02 19:35:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5572. [2023-04-02 19:35:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5572 states, 5447 states have (on average 1.5008261428309162) internal successors, (8175), 5471 states have internal predecessors, (8175), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (430), 73 states have call predecessors, (430), 26 states have call successors, (430) [2023-04-02 19:35:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5572 states to 5572 states and 8632 transitions. [2023-04-02 19:35:49,263 INFO L78 Accepts]: Start accepts. Automaton has 5572 states and 8632 transitions. Word has length 44 [2023-04-02 19:35:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:49,263 INFO L495 AbstractCegarLoop]: Abstraction has 5572 states and 8632 transitions. [2023-04-02 19:35:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-04-02 19:35:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5572 states and 8632 transitions. [2023-04-02 19:35:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 19:35:49,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:49,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 19:35:49,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 19:35:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:49,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:49,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 239384306, now seen corresponding path program 1 times [2023-04-02 19:35:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323256911] [2023-04-02 19:35:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:35:49,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323256911] [2023-04-02 19:35:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323256911] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768860862] [2023-04-02 19:35:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:49,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:49,688 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) [2023-04-02 19:35:49,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 19:35:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:49,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:35:49,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:35:49,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:35:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768860862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:49,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:35:49,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:35:49,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121046247] [2023-04-02 19:35:49,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:49,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:35:49,904 INFO L87 Difference]: Start difference. First operand 5572 states and 8632 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) [2023-04-02 19:35:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:53,604 INFO L93 Difference]: Finished difference Result 16831 states and 27251 transitions. [2023-04-02 19:35:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:35:53,605 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 58 [2023-04-02 19:35:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:53,665 INFO L225 Difference]: With dead ends: 16831 [2023-04-02 19:35:53,665 INFO L226 Difference]: Without dead ends: 11264 [2023-04-02 19:35:53,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:35:53,683 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2398 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:53,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:35:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2023-04-02 19:35:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 9568. [2023-04-02 19:35:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9568 states, 9297 states have (on average 1.372915994406798) internal successors, (12764), 9365 states have internal predecessors, (12764), 45 states have call successors, (45), 45 states have call predecessors, (45), 225 states have return successors, (1341), 157 states have call predecessors, (1341), 44 states have call successors, (1341) [2023-04-02 19:35:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 14150 transitions. [2023-04-02 19:35:53,948 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 14150 transitions. Word has length 58 [2023-04-02 19:35:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:53,949 INFO L495 AbstractCegarLoop]: Abstraction has 9568 states and 14150 transitions. [2023-04-02 19:35:53,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-04-02 19:35:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 14150 transitions. [2023-04-02 19:35:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 19:35:53,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:53,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:53,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 19:35:54,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 19:35:54,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:54,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 273482911, now seen corresponding path program 1 times [2023-04-02 19:35:54,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:54,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675833403] [2023-04-02 19:35:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:35:54,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675833403] [2023-04-02 19:35:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675833403] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:54,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:35:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630446620] [2023-04-02 19:35:54,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:35:54,429 INFO L87 Difference]: Start difference. First operand 9568 states and 14150 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:35:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:58,812 INFO L93 Difference]: Finished difference Result 28986 states and 46124 transitions. [2023-04-02 19:35:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:35:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2023-04-02 19:35:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:58,903 INFO L225 Difference]: With dead ends: 28986 [2023-04-02 19:35:58,904 INFO L226 Difference]: Without dead ends: 19423 [2023-04-02 19:35:58,931 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 [2023-04-02 19:35:58,932 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2051 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 5307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:58,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2051 Valid, 116 Invalid, 5307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 19:35:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19423 states. [2023-04-02 19:35:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19423 to 19157. [2023-04-02 19:35:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 18555 states have (on average 1.3611964430072756) internal successors, (25257), 18737 states have internal predecessors, (25257), 87 states have call successors, (87), 87 states have call predecessors, (87), 514 states have return successors, (4751), 332 states have call predecessors, (4751), 86 states have call successors, (4751) [2023-04-02 19:35:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 30095 transitions. [2023-04-02 19:35:59,468 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 30095 transitions. Word has length 59 [2023-04-02 19:35:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:59,468 INFO L495 AbstractCegarLoop]: Abstraction has 19157 states and 30095 transitions. [2023-04-02 19:35:59,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:35:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 30095 transitions. [2023-04-02 19:35:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 19:35:59,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:59,472 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:35:59,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 19:35:59,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:59,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1898568649, now seen corresponding path program 1 times [2023-04-02 19:35:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092813397] [2023-04-02 19:35:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 19:35:59,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:59,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092813397] [2023-04-02 19:35:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092813397] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:59,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347049302] [2023-04-02 19:35:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:59,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:59,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:35:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 19:35:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:59,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:35:59,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 19:35:59,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:35:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347049302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:35:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:35:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653141460] [2023-04-02 19:35:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:59,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:35:59,928 INFO L87 Difference]: Start difference. First operand 19157 states and 30095 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-02 19:36:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:36:04,098 INFO L93 Difference]: Finished difference Result 48382 states and 79343 transitions. [2023-04-02 19:36:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:36:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 81 [2023-04-02 19:36:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:36:04,226 INFO L225 Difference]: With dead ends: 48382 [2023-04-02 19:36:04,226 INFO L226 Difference]: Without dead ends: 29230 [2023-04-02 19:36:04,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:36:04,282 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2098 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 19:36:04,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 95 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 4109 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 19:36:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29230 states. [2023-04-02 19:36:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29230 to 28623. [2023-04-02 19:36:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28623 states, 27698 states have (on average 1.2740270055599683) internal successors, (35288), 27999 states have internal predecessors, (35288), 129 states have call successors, (129), 129 states have call predecessors, (129), 795 states have return successors, (8591), 494 states have call predecessors, (8591), 128 states have call successors, (8591) [2023-04-02 19:36:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28623 states to 28623 states and 44008 transitions. [2023-04-02 19:36:04,994 INFO L78 Accepts]: Start accepts. Automaton has 28623 states and 44008 transitions. Word has length 81 [2023-04-02 19:36:04,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:36:04,994 INFO L495 AbstractCegarLoop]: Abstraction has 28623 states and 44008 transitions. [2023-04-02 19:36:04,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-02 19:36:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 28623 states and 44008 transitions. [2023-04-02 19:36:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 19:36:04,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:36:04,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-02 19:36:05,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 19:36:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:36:05,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:36:05,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:36:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2009934352, now seen corresponding path program 1 times [2023-04-02 19:36:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:36:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291141596] [2023-04-02 19:36:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:36:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-04-02 19:36:05,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:36:05,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291141596] [2023-04-02 19:36:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291141596] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:36:05,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:36:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:36:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389465716] [2023-04-02 19:36:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:36:05,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:36:05,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:36:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:36:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:36:05,459 INFO L87 Difference]: Start difference. First operand 28623 states and 44008 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-02 19:36:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:36:08,684 INFO L93 Difference]: Finished difference Result 64700 states and 104556 transitions. [2023-04-02 19:36:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:36:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 115 [2023-04-02 19:36:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:36:08,833 INFO L225 Difference]: With dead ends: 64700 [2023-04-02 19:36:08,833 INFO L226 Difference]: Without dead ends: 36082 [2023-04-02 19:36:08,904 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 [2023-04-02 19:36:08,905 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:36:08,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 985 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:36:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36082 states. [2023-04-02 19:36:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36082 to 35832. [2023-04-02 19:36:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 34849 states have (on average 1.2471233033946454) internal successors, (43461), 35151 states have internal predecessors, (43461), 162 states have call successors, (162), 162 states have call predecessors, (162), 820 states have return successors, (10236), 518 states have call predecessors, (10236), 161 states have call successors, (10236) [2023-04-02 19:36:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 53859 transitions. [2023-04-02 19:36:09,791 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 53859 transitions. Word has length 115 [2023-04-02 19:36:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:36:09,791 INFO L495 AbstractCegarLoop]: Abstraction has 35832 states and 53859 transitions. [2023-04-02 19:36:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-02 19:36:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 53859 transitions. [2023-04-02 19:36:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 19:36:09,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:36:09,799 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-02 19:36:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 19:36:09,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:36:09,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:36:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1466741128, now seen corresponding path program 1 times [2023-04-02 19:36:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:36:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962271938] [2023-04-02 19:36:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:36:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:36:10,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:36:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962271938] [2023-04-02 19:36:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962271938] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:36:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285510472] [2023-04-02 19:36:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:10,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:36:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:36:10,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:36:10,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 19:36:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:10,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:36:10,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:36:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:36:10,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:36:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:36:10,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285510472] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:36:10,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964699677] [2023-04-02 19:36:10,503 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-04-02 19:36:10,503 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:36:10,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:36:10,511 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:36:10,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:36:10,635 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:36:11,010 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2023-04-02 19:36:22,229 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 178716 conjuctions. This might take some time... [2023-04-02 19:36:34,425 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 258 conjuctions. [2023-04-02 19:36:39,501 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 19:36:39,848 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 177012 conjuctions. This might take some time...