/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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:34:23,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:34:23,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:34:23,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:34:23,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:34:23,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:34:23,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:34:23,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:34:23,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:34:23,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:34:23,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:34:23,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:34:23,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:34:23,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:34:23,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:34:23,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:34:23,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:34:23,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:34:23,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:34:23,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:34:23,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:34:23,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:34:23,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:34:23,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:34:23,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:34:23,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:34:23,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:34:23,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:34:23,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:34:23,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:34:23,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:34:23,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:34:23,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:34:23,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:34:23,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:34:23,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:34:23,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:34:23,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:34:23,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:34:23,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:34:23,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:34:23,433 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 19:34:23,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:34:23,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:34:23,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:34:23,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:34:23,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:34:23,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:34:23,455 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:34:23,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:34:23,455 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:34:23,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:34:23,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:34:23,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:34:23,457 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:34:23,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:34:23,457 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:34:23,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:34:23,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:34:23,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:34:23,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:34:23,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:34:23,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:34:23,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:23,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:34:23,459 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:34:23,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:34:23,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:34:23,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:34:23,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:34:23,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:34:23,663 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:34:23,663 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:34:23,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2023-04-02 19:34:24,842 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:34:25,284 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:34:25,285 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2023-04-02 19:34:25,320 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d27a73e/58b8a3700e3c45a7a442de015e84979a/FLAG6130a04f7 [2023-04-02 19:34:25,336 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d27a73e/58b8a3700e3c45a7a442de015e84979a [2023-04-02 19:34:25,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:34:25,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:34:25,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:25,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:34:25,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:34:25,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:25" (1/1) ... [2023-04-02 19:34:25,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196b9e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:25, skipping insertion in model container [2023-04-02 19:34:25,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:25" (1/1) ... [2023-04-02 19:34:25,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:34:25,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:34:25,736 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_label52.c[9091,9104] [2023-04-02 19:34:26,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:26,536 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:34:26,565 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_label52.c[9091,9104] [2023-04-02 19:34:27,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:27,064 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:34:27,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27 WrapperNode [2023-04-02 19:34:27,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:27,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:34:27,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:34:27,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:34:27,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:34:27,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:34:27,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:34:27,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:34:27,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (1/1) ... [2023-04-02 19:34:27,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:27,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:27,490 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 19:34:27,511 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 19:34:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:34:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:34:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:34:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:34:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:34:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:34:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:34:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:34:27,619 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:34:27,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:34:32,485 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:34:35,092 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:34:35,092 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:34:35,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:35 BoogieIcfgContainer [2023-04-02 19:34:35,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:34:35,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:34:35,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:34:35,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:34:35,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:34:25" (1/3) ... [2023-04-02 19:34:35,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f2290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:35, skipping insertion in model container [2023-04-02 19:34:35,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:27" (2/3) ... [2023-04-02 19:34:35,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f2290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:35, skipping insertion in model container [2023-04-02 19:34:35,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:35" (3/3) ... [2023-04-02 19:34:35,105 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label52.c [2023-04-02 19:34:35,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:34:35,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:34:35,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:34:35,208 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;@3cc9e18a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:34:35,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:34:35,340 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 19:34:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:34:35,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:35,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:35,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:35,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash -330925260, now seen corresponding path program 1 times [2023-04-02 19:34:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785713557] [2023-04-02 19:34:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:35,754 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 19:34:35,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785713557] [2023-04-02 19:34:35,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785713557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:35,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:35,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900020935] [2023-04-02 19:34:35,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:35,801 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 19:34:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:39,077 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:34:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:39,082 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 19:34:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:39,102 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:34:39,102 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:34:39,109 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 19:34:39,112 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:39,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-02 19:34:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:34:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-02 19:34:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 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 19:34:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-02 19:34:39,232 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-02 19:34:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:39,233 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-02 19:34:39,233 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 19:34:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-02 19:34:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 19:34:39,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:39,235 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] [2023-04-02 19:34:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:34:39,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:39,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash 794549961, now seen corresponding path program 1 times [2023-04-02 19:34:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:39,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386006157] [2023-04-02 19:34:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:39,540 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 19:34:39,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:39,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386006157] [2023-04-02 19:34:39,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386006157] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:39,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:39,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377333661] [2023-04-02 19:34:39,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:39,546 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 19:34:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:44,720 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-02 19:34:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:34:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-04-02 19:34:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:44,735 INFO L225 Difference]: With dead ends: 4183 [2023-04-02 19:34:44,736 INFO L226 Difference]: Without dead ends: 2819 [2023-04-02 19:34:44,739 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 19:34:44,741 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:44,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-02 19:34:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-02 19:34:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-02 19:34:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-02 19:34:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-02 19:34:44,837 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-02 19:34:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:44,837 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-02 19:34:44,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 19:34:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-02 19:34:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:34:44,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:44,840 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] [2023-04-02 19:34:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:34:44,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:44,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -144738003, now seen corresponding path program 1 times [2023-04-02 19:34:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967160029] [2023-04-02 19:34:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:45,096 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 19:34:45,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:45,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967160029] [2023-04-02 19:34:45,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967160029] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801000087] [2023-04-02 19:34:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:45,102 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 19:34:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:49,898 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-02 19:34:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:34:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-02 19:34:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:49,940 INFO L225 Difference]: With dead ends: 8433 [2023-04-02 19:34:49,940 INFO L226 Difference]: Without dead ends: 5687 [2023-04-02 19:34:49,952 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 19:34:49,954 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:49,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-04-02 19:34:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-02 19:34:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-02 19:34:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-02 19:34:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-02 19:34:50,149 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-02 19:34:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:50,149 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-02 19:34:50,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 19:34:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-02 19:34:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 19:34:50,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:50,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:50,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:34:50,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:50,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash -757845197, now seen corresponding path program 1 times [2023-04-02 19:34:50,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:50,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477715919] [2023-04-02 19:34:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:50,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:34:50,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:50,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477715919] [2023-04-02 19:34:50,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477715919] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:50,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663952057] [2023-04-02 19:34:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:50,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:50,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:50,407 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 19:34:50,438 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 19:34:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:50,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:34:50,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:34:50,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:50,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663952057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:50,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:50,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:34:50,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588476229] [2023-04-02 19:34:50,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:50,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:34:50,626 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 19:34:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:54,481 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-02 19:34:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:34:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-04-02 19:34:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:54,535 INFO L225 Difference]: With dead ends: 16768 [2023-04-02 19:34:54,535 INFO L226 Difference]: Without dead ends: 11203 [2023-04-02 19:34:54,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 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 19:34:54,554 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 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, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:54,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 19:34:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-02 19:34:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-02 19:34:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-02 19:34:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-02 19:34:54,820 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-02 19:34:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:54,821 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-02 19:34:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 19:34:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-02 19:34:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 19:34:54,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:54,822 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, 1] [2023-04-02 19:34:54,839 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 19:34:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:55,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:55,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 810076826, now seen corresponding path program 1 times [2023-04-02 19:34:55,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726804881] [2023-04-02 19:34:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:55,241 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 19:34:55,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:55,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726804881] [2023-04-02 19:34:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726804881] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675498618] [2023-04-02 19:34:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:55,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:55,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:55,253 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 19:34:55,256 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 19:34:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:55,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:34:55,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:55,552 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 19:34:55,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:55,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675498618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:55,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:55,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:34:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539105869] [2023-04-02 19:34:55,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:34:55,559 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 19:34:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:59,892 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-02 19:34:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:34:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 45 [2023-04-02 19:34:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:59,961 INFO L225 Difference]: With dead ends: 24791 [2023-04-02 19:34:59,962 INFO L226 Difference]: Without dead ends: 14962 [2023-04-02 19:34:59,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 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 19:34:59,993 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:59,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 19:35:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-02 19:35:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14607. [2023-04-02 19:35:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14607 states, 14159 states have (on average 1.2818701885726393) internal successors, (18150), 14285 states have internal predecessors, (18150), 68 states have call successors, (68), 68 states have call predecessors, (68), 379 states have return successors, (2708), 253 states have call predecessors, (2708), 67 states have call successors, (2708) [2023-04-02 19:35:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 20926 transitions. [2023-04-02 19:35:00,485 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 20926 transitions. Word has length 45 [2023-04-02 19:35:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:00,487 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 20926 transitions. [2023-04-02 19:35:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 19:35:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 20926 transitions. [2023-04-02 19:35:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:35:00,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:00,490 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] [2023-04-02 19:35:00,498 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 19:35:00,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:00,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:00,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1294064971, now seen corresponding path program 1 times [2023-04-02 19:35:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735812763] [2023-04-02 19:35:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:35:00,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735812763] [2023-04-02 19:35:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735812763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:00,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:35:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015823273] [2023-04-02 19:35:00,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:35:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:00,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:35:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:35:00,886 INFO L87 Difference]: Start difference. First operand 14607 states and 20926 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 19:35:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:03,945 INFO L93 Difference]: Finished difference Result 30621 states and 45209 transitions. [2023-04-02 19:35:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:35:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 79 [2023-04-02 19:35:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:04,003 INFO L225 Difference]: With dead ends: 30621 [2023-04-02 19:35:04,004 INFO L226 Difference]: Without dead ends: 16019 [2023-04-02 19:35:04,041 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 19:35:04,042 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:04,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:35:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-04-02 19:35:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 15818. [2023-04-02 19:35:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15818 states, 15361 states have (on average 1.2357268407004753) internal successors, (18982), 15488 states have internal predecessors, (18982), 73 states have call successors, (73), 73 states have call predecessors, (73), 383 states have return successors, (2724), 256 states have call predecessors, (2724), 72 states have call successors, (2724) [2023-04-02 19:35:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15818 states to 15818 states and 21779 transitions. [2023-04-02 19:35:04,525 INFO L78 Accepts]: Start accepts. Automaton has 15818 states and 21779 transitions. Word has length 79 [2023-04-02 19:35:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:04,527 INFO L495 AbstractCegarLoop]: Abstraction has 15818 states and 21779 transitions. [2023-04-02 19:35:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 19:35:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15818 states and 21779 transitions. [2023-04-02 19:35:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-02 19:35:04,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:04,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 19:35:04,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:35:04,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:04,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash -386673030, now seen corresponding path program 1 times [2023-04-02 19:35:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099234792] [2023-04-02 19:35:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 19:35:04,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:04,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099234792] [2023-04-02 19:35:04,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099234792] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:04,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:04,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:35:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123349101] [2023-04-02 19:35:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:04,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:35:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:35:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:35:04,726 INFO L87 Difference]: Start difference. First operand 15818 states and 21779 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:35:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:07,994 INFO L93 Difference]: Finished difference Result 36536 states and 51969 transitions. [2023-04-02 19:35:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:35:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 93 [2023-04-02 19:35:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:08,065 INFO L225 Difference]: With dead ends: 36536 [2023-04-02 19:35:08,065 INFO L226 Difference]: Without dead ends: 20723 [2023-04-02 19:35:08,098 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 19:35:08,098 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:08,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1263 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 19:35:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2023-04-02 19:35:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20559. [2023-04-02 19:35:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 19994 states have (on average 1.2070121036310892) internal successors, (24133), 20152 states have internal predecessors, (24133), 94 states have call successors, (94), 94 states have call predecessors, (94), 470 states have return successors, (3808), 312 states have call predecessors, (3808), 93 states have call successors, (3808) [2023-04-02 19:35:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 28035 transitions. [2023-04-02 19:35:08,497 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 28035 transitions. Word has length 93 [2023-04-02 19:35:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:08,500 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 28035 transitions. [2023-04-02 19:35:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:35:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 28035 transitions. [2023-04-02 19:35:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-02 19:35:08,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:08,503 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:35:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 19:35:08,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:08,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 412538682, now seen corresponding path program 1 times [2023-04-02 19:35:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161841550] [2023-04-02 19:35:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:35:08,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161841550] [2023-04-02 19:35:08,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161841550] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398176897] [2023-04-02 19:35:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:08,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:08,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:08,709 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 19:35:08,716 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 19:35:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:08,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:35:08,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:35:08,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:35:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:35:09,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398176897] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:35:09,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287263021] [2023-04-02 19:35:09,034 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 19:35:09,034 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:35:09,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:35:09,041 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:35:09,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:35:09,178 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:35:09,501 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2023-04-02 19:35:29,109 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 187518 conjuctions. This might take some time... [2023-04-02 19:35:43,544 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 114 conjuctions. [2023-04-02 19:35:49,261 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5022 conjuctions. This might take some time... [2023-04-02 19:35:49,927 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2106 conjuctions. [2023-04-02 19:35:58,303 WARN L223 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 839 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 19:36:41,988 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17314 conjuctions. This might take some time... [2023-04-02 19:36:57,087 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 17314 conjuctions.