/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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:34:17,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:34:17,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:34:17,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:34:17,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:34:17,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:34:17,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:34:17,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:34:17,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:34:17,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:34:17,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:34:17,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:34:17,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:34:17,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:34:17,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:34:17,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:34:17,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:34:17,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:34:17,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:34:17,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:34:17,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:34:17,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:34:17,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:34:17,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:34:17,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:34:17,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:34:17,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:34:17,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:34:17,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:34:17,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:34:17,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:34:17,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:34:17,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:34:17,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:34:17,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:34:17,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:34:17,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:34:17,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:34:17,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:34:17,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:34:17,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:34:17,462 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 19:34:17,491 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:34:17,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:34:17,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:34:17,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:34:17,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:34:17,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:34:17,493 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:34:17,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:34:17,493 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:34:17,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:34:17,494 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:34:17,494 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:34:17,494 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:34:17,494 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:34:17,494 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:34:17,494 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:34:17,495 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:34:17,495 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:34:17,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:34:17,495 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:34:17,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:34:17,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:34:17,497 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:34:17,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:34:17,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:34:17,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:34:17,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:17,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:34:17,497 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:34:17,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:34:17,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:34:17,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:34:17,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:34:17,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:34:17,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:34:17,748 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:34:17,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2023-04-02 19:34:18,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:34:19,411 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:34:19,411 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2023-04-02 19:34:19,446 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a664f8b/f51adb81e8234f44bc27a54881be38e5/FLAG60eae6ef0 [2023-04-02 19:34:19,464 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a664f8b/f51adb81e8234f44bc27a54881be38e5 [2023-04-02 19:34:19,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:34:19,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:34:19,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:19,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:34:19,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:34:19,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:19" (1/1) ... [2023-04-02 19:34:19,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b22c4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:19, skipping insertion in model container [2023-04-02 19:34:19,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:19" (1/1) ... [2023-04-02 19:34:19,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:34:19,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:34:19,925 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_label51.c[3668,3681] [2023-04-02 19:34:20,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:20,715 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:34:20,743 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_label51.c[3668,3681] [2023-04-02 19:34:21,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:21,233 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:34:21,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21 WrapperNode [2023-04-02 19:34:21,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:21,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:34:21,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:34:21,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:34:21,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:34:21,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:34:21,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:34:21,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:34:21,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (1/1) ... [2023-04-02 19:34:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:21,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:21,652 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 19:34:21,661 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 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:34:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:34:21,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:34:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:34:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:34:21,781 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:34:21,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:34:26,597 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:34:29,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:34:29,612 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:34:29,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:29 BoogieIcfgContainer [2023-04-02 19:34:29,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:34:29,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:34:29,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:34:29,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:34:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:34:19" (1/3) ... [2023-04-02 19:34:29,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200ced0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:29, skipping insertion in model container [2023-04-02 19:34:29,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:21" (2/3) ... [2023-04-02 19:34:29,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200ced0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:29, skipping insertion in model container [2023-04-02 19:34:29,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:29" (3/3) ... [2023-04-02 19:34:29,622 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label51.c [2023-04-02 19:34:29,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:34:29,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:34:29,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:34:29,699 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;@75d4c3fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:34:29,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:34:29,706 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 19:34:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:34:29,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:29,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:29,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:29,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -330935500, now seen corresponding path program 1 times [2023-04-02 19:34:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677001001] [2023-04-02 19:34:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:29,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:30,159 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 19:34:30,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677001001] [2023-04-02 19:34:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677001001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:30,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743862657] [2023-04-02 19:34:30,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:30,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:30,206 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 19:34:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:33,791 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:34:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:33,794 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 19:34:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:33,815 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:34:33,815 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:34:33,824 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 19:34:33,828 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 715 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:33,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 104 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-02 19:34:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:34:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2023-04-02 19:34:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1342 states have (on average 1.9418777943368106) internal successors, (2606), 1342 states have internal predecessors, (2606), 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 19:34:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2629 transitions. [2023-04-02 19:34:33,925 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2629 transitions. Word has length 11 [2023-04-02 19:34:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:33,925 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2629 transitions. [2023-04-02 19:34:33,925 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 19:34:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2629 transitions. [2023-04-02 19:34:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:34:33,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:33,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:33,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:34:33,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:33,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1899456821, now seen corresponding path program 1 times [2023-04-02 19:34:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192710407] [2023-04-02 19:34:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:34,186 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 19:34:34,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192710407] [2023-04-02 19:34:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192710407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238827545] [2023-04-02 19:34:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:34,192 INFO L87 Difference]: Start difference. First operand 1360 states and 2629 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:38,577 INFO L93 Difference]: Finished difference Result 4145 states and 8028 transitions. [2023-04-02 19:34:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:34:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-02 19:34:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:38,595 INFO L225 Difference]: With dead ends: 4145 [2023-04-02 19:34:38,595 INFO L226 Difference]: Without dead ends: 2790 [2023-04-02 19:34:38,606 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 19:34:38,608 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2457 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:38,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 109 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-02 19:34:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-02 19:34:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2730. [2023-04-02 19:34:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2687 states have (on average 1.6278377372534425) internal successors, (4374), 2692 states have internal predecessors, (4374), 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 19:34:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 4464 transitions. [2023-04-02 19:34:38,708 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 4464 transitions. Word has length 21 [2023-04-02 19:34:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:38,709 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 4464 transitions. [2023-04-02 19:34:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 4464 transitions. [2023-04-02 19:34:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 19:34:38,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:38,710 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 19:34:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:34:38,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:38,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1928736343, now seen corresponding path program 1 times [2023-04-02 19:34:38,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224591389] [2023-04-02 19:34:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:38,927 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 19:34:38,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:38,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224591389] [2023-04-02 19:34:38,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224591389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:38,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:38,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:38,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372850833] [2023-04-02 19:34:38,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:38,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:38,931 INFO L87 Difference]: Start difference. First operand 2730 states and 4464 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 19:34:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:43,807 INFO L93 Difference]: Finished difference Result 8480 states and 14186 transitions. [2023-04-02 19:34:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:34:43,811 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 19:34:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:43,843 INFO L225 Difference]: With dead ends: 8480 [2023-04-02 19:34:43,843 INFO L226 Difference]: Without dead ends: 5755 [2023-04-02 19:34:43,854 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 19:34:43,858 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2188 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2188 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:43,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2188 Valid, 127 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-02 19:34:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2023-04-02 19:34:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5609. [2023-04-02 19:34:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5463 states have (on average 1.4363902617609372) internal successors, (7847), 5498 states have internal predecessors, (7847), 27 states have call successors, (27), 27 states have call predecessors, (27), 118 states have return successors, (459), 83 states have call predecessors, (459), 26 states have call successors, (459) [2023-04-02 19:34:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8333 transitions. [2023-04-02 19:34:44,041 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8333 transitions. Word has length 27 [2023-04-02 19:34:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:44,042 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8333 transitions. [2023-04-02 19:34:44,042 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 19:34:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8333 transitions. [2023-04-02 19:34:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 19:34:44,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:44,044 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 19:34:44,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:34:44,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:44,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1596448858, now seen corresponding path program 1 times [2023-04-02 19:34:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81241792] [2023-04-02 19:34:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:44,275 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 19:34:44,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81241792] [2023-04-02 19:34:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81241792] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639631245] [2023-04-02 19:34:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:44,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:44,281 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 19:34:44,315 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 19:34:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:44,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:34:44,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:44,531 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 19:34:44,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639631245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:44,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:34:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720231037] [2023-04-02 19:34:44,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:44,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:44,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:34:44,533 INFO L87 Difference]: Start difference. First operand 5609 states and 8333 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 19:34:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:49,080 INFO L93 Difference]: Finished difference Result 17105 states and 26427 transitions. [2023-04-02 19:34:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:34:49,082 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 19:34:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:49,135 INFO L225 Difference]: With dead ends: 17105 [2023-04-02 19:34:49,135 INFO L226 Difference]: Without dead ends: 11501 [2023-04-02 19:34:49,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:34:49,158 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2098 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:49,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 95 Invalid, 5247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 4109 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:34:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2023-04-02 19:34:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11238. [2023-04-02 19:34:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 10909 states have (on average 1.2718855990466587) internal successors, (13875), 10998 states have internal predecessors, (13875), 51 states have call successors, (51), 51 states have call predecessors, (51), 277 states have return successors, (1463), 188 states have call predecessors, (1463), 50 states have call successors, (1463) [2023-04-02 19:34:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 15389 transitions. [2023-04-02 19:34:49,447 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 15389 transitions. Word has length 45 [2023-04-02 19:34:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:49,447 INFO L495 AbstractCegarLoop]: Abstraction has 11238 states and 15389 transitions. [2023-04-02 19:34:49,447 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 19:34:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 15389 transitions. [2023-04-02 19:34:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 19:34:49,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:49,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:49,462 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 19:34:49,662 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 19:34:49,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:49,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1272998767, now seen corresponding path program 1 times [2023-04-02 19:34:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602338409] [2023-04-02 19:34:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:34:50,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602338409] [2023-04-02 19:34:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602338409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:50,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240711531] [2023-04-02 19:34:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:50,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:50,313 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 19:34:50,321 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 19:34:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:50,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 19:34:50,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:50,541 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 19:34:50,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:50,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240711531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:50,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:50,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-02 19:34:50,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480192458] [2023-04-02 19:34:50,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:34:50,544 INFO L87 Difference]: Start difference. First operand 11238 states and 15389 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 19:34:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:54,261 INFO L93 Difference]: Finished difference Result 23691 states and 32483 transitions. [2023-04-02 19:34:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:34:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-04-02 19:34:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:54,318 INFO L225 Difference]: With dead ends: 23691 [2023-04-02 19:34:54,318 INFO L226 Difference]: Without dead ends: 12458 [2023-04-02 19:34:54,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-02 19:34:54,346 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1953 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:54,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 116 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:34:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2023-04-02 19:34:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 12164. [2023-04-02 19:34:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12164 states, 11724 states have (on average 1.253752985329239) internal successors, (14699), 11860 states have internal predecessors, (14699), 54 states have call successors, (54), 54 states have call predecessors, (54), 385 states have return successors, (1737), 249 states have call predecessors, (1737), 53 states have call successors, (1737) [2023-04-02 19:34:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12164 states to 12164 states and 16490 transitions. [2023-04-02 19:34:54,644 INFO L78 Accepts]: Start accepts. Automaton has 12164 states and 16490 transitions. Word has length 70 [2023-04-02 19:34:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 12164 states and 16490 transitions. [2023-04-02 19:34:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 19:34:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12164 states and 16490 transitions. [2023-04-02 19:34:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:34:54,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:54,649 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 19:34:54,659 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 19:34:54,855 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 19:34:54,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:54,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2012127765, now seen corresponding path program 1 times [2023-04-02 19:34:54,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:54,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179321143] [2023-04-02 19:34:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:55,029 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 19:34:55,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:55,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179321143] [2023-04-02 19:34:55,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179321143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:55,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:55,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:55,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841193588] [2023-04-02 19:34:55,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:55,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:55,032 INFO L87 Difference]: Start difference. First operand 12164 states and 16490 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 19:34:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:58,267 INFO L93 Difference]: Finished difference Result 29251 states and 42522 transitions. [2023-04-02 19:34:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:58,268 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 19:34:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:58,331 INFO L225 Difference]: With dead ends: 29251 [2023-04-02 19:34:58,332 INFO L226 Difference]: Without dead ends: 17741 [2023-04-02 19:34:58,364 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 19:34:58,365 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:58,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1281 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 19:34:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17741 states. [2023-04-02 19:34:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17741 to 17151. [2023-04-02 19:34:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17151 states, 16578 states have (on average 1.2168536614790686) internal successors, (20173), 16754 states have internal predecessors, (20173), 77 states have call successors, (77), 77 states have call predecessors, (77), 495 states have return successors, (3050), 319 states have call predecessors, (3050), 76 states have call successors, (3050) [2023-04-02 19:34:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17151 states to 17151 states and 23300 transitions. [2023-04-02 19:34:58,721 INFO L78 Accepts]: Start accepts. Automaton has 17151 states and 23300 transitions. Word has length 79 [2023-04-02 19:34:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:58,723 INFO L495 AbstractCegarLoop]: Abstraction has 17151 states and 23300 transitions. [2023-04-02 19:34:58,723 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 19:34:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17151 states and 23300 transitions. [2023-04-02 19:34:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 19:34:58,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:58,725 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:34:58,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:58,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash 260331732, now seen corresponding path program 1 times [2023-04-02 19:34:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:58,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212630573] [2023-04-02 19:34:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 19:34:58,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:58,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212630573] [2023-04-02 19:34:58,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212630573] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:58,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353331783] [2023-04-02 19:34:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:59,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:59,005 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 19:34:59,008 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 19:34:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:59,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 19:34:59,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 19:34:59,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:34:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 19:34:59,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353331783] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:59,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 19:34:59,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-02 19:34:59,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297579216] [2023-04-02 19:34:59,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:59,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:59,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:34:59,621 INFO L87 Difference]: Start difference. First operand 17151 states and 23300 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:35:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:03,590 INFO L93 Difference]: Finished difference Result 50472 states and 71917 transitions. [2023-04-02 19:35:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:35:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-04-02 19:35:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:03,725 INFO L225 Difference]: With dead ends: 50472 [2023-04-02 19:35:03,725 INFO L226 Difference]: Without dead ends: 33975 [2023-04-02 19:35:03,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-02 19:35:03,774 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2556 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:03,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2556 Valid, 80 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:35:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33975 states. [2023-04-02 19:35:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33975 to 32860. [2023-04-02 19:35:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32860 states, 31637 states have (on average 1.1805164838638302) internal successors, (37348), 32049 states have internal predecessors, (37348), 145 states have call successors, (145), 145 states have call predecessors, (145), 1077 states have return successors, (7482), 665 states have call predecessors, (7482), 144 states have call successors, (7482) [2023-04-02 19:35:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32860 states to 32860 states and 44975 transitions. [2023-04-02 19:35:04,531 INFO L78 Accepts]: Start accepts. Automaton has 32860 states and 44975 transitions. Word has length 85 [2023-04-02 19:35:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:04,532 INFO L495 AbstractCegarLoop]: Abstraction has 32860 states and 44975 transitions. [2023-04-02 19:35:04,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:35:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32860 states and 44975 transitions. [2023-04-02 19:35:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 19:35:04,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:04,534 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:04,543 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 19:35:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:04,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:04,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1023432467, now seen corresponding path program 1 times [2023-04-02 19:35:04,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:04,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390262669] [2023-04-02 19:35:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 19:35:04,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:04,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390262669] [2023-04-02 19:35:04,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390262669] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:04,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693928327] [2023-04-02 19:35:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:04,974 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 19:35:04,977 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 19:35:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:05,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:35:05,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 19:35:05,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:35:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 19:35:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693928327] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:35:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774715556] [2023-04-02 19:35:05,371 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-02 19:35:05,371 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:35:05,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:35:05,378 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:35:05,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:35:05,519 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:35:05,856 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2023-04-02 19:35:06,108 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22420 conjuctions. This might take some time... [2023-04-02 19:35:07,976 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 466 conjuctions. [2023-04-02 19:35:16,277 WARN L223 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 807 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 19:35:53,772 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 43