/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:30:11,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:30:11,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:30:11,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:30:11,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:30:11,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:30:11,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:30:11,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:30:11,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:30:11,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:30:11,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:30:11,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:30:11,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:30:11,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:30:11,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:30:11,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:30:11,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:30:11,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:30:11,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:30:11,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:30:11,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:30:11,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:30:11,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:30:11,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:30:11,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 19:30:11,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:30:11,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:30:11,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:30:11,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:30:11,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:30:11,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:30:11,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:30:11,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:30:11,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:30:11,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:30:11,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:30:11,502 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 19:30:11,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:30:11,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:30:11,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:30:11,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:30:11,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:30:11,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:30:11,534 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:30:11,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:30:11,534 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:30:11,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:30:11,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:30:11,535 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:30:11,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:30:11,536 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:30:11,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:30:11,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:30:11,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:30:11,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:30:11,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:30:11,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:30:11,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:30:11,539 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:30:11,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:30:11,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:30:11,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:30:11,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:30:11,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:30:11,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:30:11,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:30:11,836 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:30:11,836 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:30:11,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2023-04-02 19:30:13,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:30:13,504 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:30:13,505 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2023-04-02 19:30:13,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9e355a85/df3ee4d6f9bc424d89abf48bbce04334/FLAGce5536a57 [2023-04-02 19:30:13,553 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9e355a85/df3ee4d6f9bc424d89abf48bbce04334 [2023-04-02 19:30:13,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:30:13,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:30:13,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:30:13,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:30:13,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:30:13,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:30:13" (1/1) ... [2023-04-02 19:30:13,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3c835a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:13, skipping insertion in model container [2023-04-02 19:30:13,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:30:13" (1/1) ... [2023-04-02 19:30:13,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:30:13,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:30:13,973 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_label26.c[5554,5567] [2023-04-02 19:30:14,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:30:14,808 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:30:14,853 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_label26.c[5554,5567] [2023-04-02 19:30:15,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:30:15,381 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:30:15,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15 WrapperNode [2023-04-02 19:30:15,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:30:15,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:30:15,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:30:15,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:30:15,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:30:15,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:30:15,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:30:15,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:30:15,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (1/1) ... [2023-04-02 19:30:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:30:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:30:15,722 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 19:30:15,744 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 19:30:15,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:30:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:30:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:30:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:30:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:30:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:30:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:30:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:30:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:30:15,862 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:30:15,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:30:20,710 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:30:23,208 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:30:23,208 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:30:23,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:30:23 BoogieIcfgContainer [2023-04-02 19:30:23,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:30:23,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:30:23,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:30:23,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:30:23,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:30:13" (1/3) ... [2023-04-02 19:30:23,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a059ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:30:23, skipping insertion in model container [2023-04-02 19:30:23,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:15" (2/3) ... [2023-04-02 19:30:23,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a059ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:30:23, skipping insertion in model container [2023-04-02 19:30:23,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:30:23" (3/3) ... [2023-04-02 19:30:23,221 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2023-04-02 19:30:23,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:30:23,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:30:23,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:30:23,303 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;@78900a75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:30:23,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:30:23,310 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 19:30:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:30:23,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:23,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:30:23,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:23,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -330931916, now seen corresponding path program 1 times [2023-04-02 19:30:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256587137] [2023-04-02 19:30:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:23,821 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 19:30:23,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256587137] [2023-04-02 19:30:23,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256587137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:23,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:30:23,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:30:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849640895] [2023-04-02 19:30:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:30:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:30:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:30:23,856 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 19:30:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:27,529 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:30:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:30:27,535 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 19:30:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:27,556 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:30:27,556 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:30:27,564 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 19:30:27,567 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:27,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:30:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:30:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-02 19:30:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 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 19:30:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-02 19:30:27,691 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-02 19:30:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:27,691 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-02 19:30:27,691 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 19:30:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-02 19:30:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:30:27,693 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:27,693 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 19:30:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:30:27,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:27,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -823144251, now seen corresponding path program 1 times [2023-04-02 19:30:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:27,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47352614] [2023-04-02 19:30:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:27,889 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 19:30:27,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47352614] [2023-04-02 19:30:27,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47352614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:27,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:30:27,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:30:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690905082] [2023-04-02 19:30:27,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:30:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:30:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:30:27,893 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 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 19:30:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:32,330 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-02 19:30:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:30:32,331 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 19:30:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:32,344 INFO L225 Difference]: With dead ends: 4150 [2023-04-02 19:30:32,345 INFO L226 Difference]: Without dead ends: 2790 [2023-04-02 19:30:32,347 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 19:30:32,349 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:32,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:30:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-02 19:30:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-02 19:30:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-02 19:30:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-02 19:30:32,442 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-02 19:30:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:32,442 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-02 19:30:32,443 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 19:30:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-02 19:30:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 19:30:32,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:32,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:30:32,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:30:32,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:32,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 631878625, now seen corresponding path program 1 times [2023-04-02 19:30:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558309458] [2023-04-02 19:30:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:32,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:32,603 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 19:30:32,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558309458] [2023-04-02 19:30:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558309458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:32,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:30:32,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:30:32,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087435184] [2023-04-02 19:30:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:32,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:30:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:30:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:30:32,608 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 19:30:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:37,111 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-02 19:30:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:30:37,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-02 19:30:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:37,145 INFO L225 Difference]: With dead ends: 8429 [2023-04-02 19:30:37,146 INFO L226 Difference]: Without dead ends: 5685 [2023-04-02 19:30:37,159 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 19:30:37,161 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:37,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:30:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-02 19:30:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-02 19:30:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-02 19:30:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-02 19:30:37,434 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-02 19:30:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:37,434 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-02 19:30:37,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 19:30:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-02 19:30:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:30:37,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:37,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:30:37,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:30:37,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:37,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1951446178, now seen corresponding path program 1 times [2023-04-02 19:30:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:37,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920826854] [2023-04-02 19:30:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:30:37,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920826854] [2023-04-02 19:30:37,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920826854] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:30:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862223654] [2023-04-02 19:30:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:37,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:30:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:30:37,649 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 19:30:37,677 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 19:30:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:37,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:30:37,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:30:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:30:37,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:30:37,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862223654] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:37,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:30:37,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:30:37,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722197919] [2023-04-02 19:30:37,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:37,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:30:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:30:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:30:37,861 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:30:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:42,348 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-02 19:30:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:30:42,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-02 19:30:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:42,400 INFO L225 Difference]: With dead ends: 17148 [2023-04-02 19:30:42,400 INFO L226 Difference]: Without dead ends: 11519 [2023-04-02 19:30:42,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 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 19:30:42,424 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2041 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:42,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 104 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:30:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-02 19:30:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-02 19:30:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-02 19:30:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-02 19:30:42,775 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-02 19:30:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:42,775 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-02 19:30:42,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:30:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-02 19:30:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 19:30:42,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:42,784 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 19:30:42,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 19:30:42,989 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 19:30:42,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:42,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash 807976255, now seen corresponding path program 1 times [2023-04-02 19:30:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:42,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314011430] [2023-04-02 19:30:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:43,455 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 19:30:43,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314011430] [2023-04-02 19:30:43,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314011430] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:30:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246618691] [2023-04-02 19:30:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:30:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:30:43,465 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 19:30:43,468 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 19:30:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:43,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 19:30:43,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:30:43,695 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 19:30:43,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:30:43,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246618691] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:43,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:30:43,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-02 19:30:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151679441] [2023-04-02 19:30:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:30:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:30:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:30:43,699 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 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 19:30:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:47,407 INFO L93 Difference]: Finished difference Result 19718 states and 26889 transitions. [2023-04-02 19:30:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:30:47,407 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 19:30:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:47,459 INFO L225 Difference]: With dead ends: 19718 [2023-04-02 19:30:47,459 INFO L226 Difference]: Without dead ends: 11456 [2023-04-02 19:30:47,483 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 19:30:47,484 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 19:30:47,484 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 19:30:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2023-04-02 19:30:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11052. [2023-04-02 19:30:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 10677 states have (on average 1.2482907183665823) internal successors, (13328), 10787 states have internal predecessors, (13328), 50 states have call successors, (50), 50 states have call predecessors, (50), 324 states have return successors, (1302), 214 states have call predecessors, (1302), 49 states have call successors, (1302) [2023-04-02 19:30:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 14680 transitions. [2023-04-02 19:30:47,887 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 14680 transitions. Word has length 70 [2023-04-02 19:30:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:47,890 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 14680 transitions. [2023-04-02 19:30:47,890 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 19:30:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 14680 transitions. [2023-04-02 19:30:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 19:30:47,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:47,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-04-02 19:30:47,900 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 19:30:48,098 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 19:30:48,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:48,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash 121450563, now seen corresponding path program 1 times [2023-04-02 19:30:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191386697] [2023-04-02 19:30:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:30:48,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:48,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191386697] [2023-04-02 19:30:48,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191386697] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:48,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:30:48,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:30:48,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643167074] [2023-04-02 19:30:48,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:30:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:30:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:30:48,307 INFO L87 Difference]: Start difference. First operand 11052 states and 14680 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 19:30:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:51,246 INFO L93 Difference]: Finished difference Result 23504 states and 32509 transitions. [2023-04-02 19:30:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:30:51,248 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 75 [2023-04-02 19:30:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:51,300 INFO L225 Difference]: With dead ends: 23504 [2023-04-02 19:30:51,300 INFO L226 Difference]: Without dead ends: 13106 [2023-04-02 19:30:51,331 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 19:30:51,332 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:51,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 19:30:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2023-04-02 19:30:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13042. [2023-04-02 19:30:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 12646 states have (on average 1.228847066266013) internal successors, (15540), 12759 states have internal predecessors, (15540), 59 states have call successors, (59), 59 states have call predecessors, (59), 336 states have return successors, (1489), 223 states have call predecessors, (1489), 58 states have call successors, (1489) [2023-04-02 19:30:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 17088 transitions. [2023-04-02 19:30:51,632 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 17088 transitions. Word has length 75 [2023-04-02 19:30:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:51,632 INFO L495 AbstractCegarLoop]: Abstraction has 13042 states and 17088 transitions. [2023-04-02 19:30:51,633 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 19:30:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 17088 transitions. [2023-04-02 19:30:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:30:51,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:51,634 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 19:30:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:30:51,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:51,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1169639579, now seen corresponding path program 1 times [2023-04-02 19:30:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351561987] [2023-04-02 19:30:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:51,819 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 19:30:51,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351561987] [2023-04-02 19:30:51,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351561987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:30:51,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:30:51,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:30:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316071459] [2023-04-02 19:30:51,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:51,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:30:51,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:30:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:30:51,822 INFO L87 Difference]: Start difference. First operand 13042 states and 17088 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 19:30:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:30:55,050 INFO L93 Difference]: Finished difference Result 36106 states and 49622 transitions. [2023-04-02 19:30:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:30:55,051 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 19:30:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:30:55,134 INFO L225 Difference]: With dead ends: 36106 [2023-04-02 19:30:55,135 INFO L226 Difference]: Without dead ends: 23718 [2023-04-02 19:30:55,171 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 19:30:55,172 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 701 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:30:55,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1245 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 19:30:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23718 states. [2023-04-02 19:30:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23718 to 21099. [2023-04-02 19:30:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21099 states, 20524 states have (on average 1.1951374001169364) internal successors, (24529), 20688 states have internal predecessors, (24529), 97 states have call successors, (97), 97 states have call predecessors, (97), 477 states have return successors, (3158), 313 states have call predecessors, (3158), 96 states have call successors, (3158) [2023-04-02 19:30:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21099 states to 21099 states and 27784 transitions. [2023-04-02 19:30:55,616 INFO L78 Accepts]: Start accepts. Automaton has 21099 states and 27784 transitions. Word has length 79 [2023-04-02 19:30:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:30:55,618 INFO L495 AbstractCegarLoop]: Abstraction has 21099 states and 27784 transitions. [2023-04-02 19:30:55,618 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 19:30:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21099 states and 27784 transitions. [2023-04-02 19:30:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 19:30:55,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:30:55,622 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 19:30:55,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 19:30:55,622 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:30:55,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:30:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash -732538604, now seen corresponding path program 1 times [2023-04-02 19:30:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:30:55,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925749790] [2023-04-02 19:30:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:55,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:30:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:55,860 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 19:30:55,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:30:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925749790] [2023-04-02 19:30:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925749790] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:30:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672924651] [2023-04-02 19:30:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:30:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:30:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:30:55,862 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 19:30:55,865 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 19:30:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:30:56,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 19:30:56,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:30:56,144 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 19:30:56,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:30:56,440 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 19:30:56,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672924651] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 19:30:56,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 19:30:56,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-02 19:30:56,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391356556] [2023-04-02 19:30:56,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:30:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:30:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:30:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:30:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:30:56,442 INFO L87 Difference]: Start difference. First operand 21099 states and 27784 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 19:31:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:00,362 INFO L93 Difference]: Finished difference Result 51416 states and 70191 transitions. [2023-04-02 19:31:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:31:00,364 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 19:31:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:00,463 INFO L225 Difference]: With dead ends: 51416 [2023-04-02 19:31:00,463 INFO L226 Difference]: Without dead ends: 30971 [2023-04-02 19:31:00,498 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 19:31:00,499 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2562 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3348 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 3348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:00,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2562 Valid, 78 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 3348 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 19:31:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30971 states. [2023-04-02 19:31:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30971 to 30385. [2023-04-02 19:31:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30385 states, 29461 states have (on average 1.1844472353280608) internal successors, (34895), 29743 states have internal predecessors, (34895), 137 states have call successors, (137), 137 states have call predecessors, (137), 786 states have return successors, (5091), 504 states have call predecessors, (5091), 136 states have call successors, (5091) [2023-04-02 19:31:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30385 states to 30385 states and 40123 transitions. [2023-04-02 19:31:01,085 INFO L78 Accepts]: Start accepts. Automaton has 30385 states and 40123 transitions. Word has length 85 [2023-04-02 19:31:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:01,089 INFO L495 AbstractCegarLoop]: Abstraction has 30385 states and 40123 transitions. [2023-04-02 19:31:01,089 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 19:31:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30385 states and 40123 transitions. [2023-04-02 19:31:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 19:31:01,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:01,095 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:01,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 19:31:01,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:01,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:01,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1649113085, now seen corresponding path program 1 times [2023-04-02 19:31:01,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:01,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431255905] [2023-04-02 19:31:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 19:31:01,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431255905] [2023-04-02 19:31:01,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431255905] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:31:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24994222] [2023-04-02 19:31:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:01,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:01,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:31:01,509 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 19:31:01,534 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 19:31:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:01,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:31:01,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:31:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 19:31:01,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:31:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 19:31:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24994222] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:31:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565439608] [2023-04-02 19:31:01,859 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 19:31:01,860 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:31:01,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:31:01,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:31:01,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:31:02,005 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:31:02,152 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2023-04-02 19:31:05,785 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 114682 conjuctions. This might take some time... [2023-04-02 19:31:18,046 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 654 conjuctions. [2023-04-02 19:31:40,332 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 29