/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_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:04:41,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:04:41,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:04:41,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:04:41,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:04:41,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:04:41,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:04:41,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:04:41,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:04:41,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:04:41,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:04:41,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:04:41,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:04:41,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:04:41,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:04:41,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:04:41,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:04:41,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:04:41,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:04:41,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:04:41,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:04:41,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:04:41,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:04:41,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:04:41,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:04:41,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:04:41,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:04:41,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:04:41,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:04:41,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:04:41,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:04:41,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:04:41,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:04:41,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:04:41,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:04:41,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:04:41,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:04:41,633 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:04:41,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:04:41,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:04:41,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:04:41,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:04:41,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:04:41,635 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:04:41,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:04:41,636 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:04:41,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:04:41,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:04:41,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:04:41,638 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:04:41,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:04:41,638 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:04:41,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:04:41,640 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:04:41,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:04:41,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:04:41,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:04:41,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:41,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:04:41,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:04:41,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:04:41,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:04:41,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:04:41,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:04:41,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:04:41,957 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:04:41,958 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:04:41,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label12.c [2023-04-01 04:04:43,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:04:43,608 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:04:43,609 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label12.c [2023-04-01 04:04:43,646 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1016bc600/58279a75f2314e05859fcf4c57f22cd2/FLAGfdec6a3fa [2023-04-01 04:04:43,664 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1016bc600/58279a75f2314e05859fcf4c57f22cd2 [2023-04-01 04:04:43,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:04:43,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:04:43,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:43,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:04:43,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:04:43,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:43" (1/1) ... [2023-04-01 04:04:43,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a64652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:43, skipping insertion in model container [2023-04-01 04:04:43,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:43" (1/1) ... [2023-04-01 04:04:43,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:04:43,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:04:44,031 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_label12.c[1672,1685] [2023-04-01 04:04:44,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:45,009 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:04:45,033 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_label12.c[1672,1685] [2023-04-01 04:04:45,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:45,503 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:04:45,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45 WrapperNode [2023-04-01 04:04:45,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:45,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:04:45,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:04:45,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:04:45,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:04:45,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:04:45,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:04:45,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:04:45,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (1/1) ... [2023-04-01 04:04:45,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:45,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:45,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:04:45,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:04:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:04:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:04:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:04:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:04:46,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:04:46,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:04:46,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:04:46,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:04:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:04:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:04:46,121 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:04:46,123 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:04:51,040 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:04:53,922 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:04:53,922 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:04:53,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:53 BoogieIcfgContainer [2023-04-01 04:04:53,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:04:53,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:04:53,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:04:53,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:04:53,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:04:43" (1/3) ... [2023-04-01 04:04:53,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a82f456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:53, skipping insertion in model container [2023-04-01 04:04:53,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:45" (2/3) ... [2023-04-01 04:04:53,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a82f456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:53, skipping insertion in model container [2023-04-01 04:04:53,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:53" (3/3) ... [2023-04-01 04:04:53,933 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label12.c [2023-04-01 04:04:53,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:04:53,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:04:54,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:04:54,168 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;@691e5b54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:04:54,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:04:54,177 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) [2023-04-01 04:04:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:04:54,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:54,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:54,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:54,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -331209381, now seen corresponding path program 1 times [2023-04-01 04:04:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209692488] [2023-04-01 04:04:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:54,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209692488] [2023-04-01 04:04:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209692488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:54,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:54,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669313093] [2023-04-01 04:04:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:54,621 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) [2023-04-01 04:04:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:58,274 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:04:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:04:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:58,298 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:04:58,298 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:04:58,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:58,310 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 [2023-04-01 04:04:58,311 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] [2023-04-01 04:04:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:04:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 04:04:58,393 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) [2023-04-01 04:04:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 04:04:58,401 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 04:04:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:58,402 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 04:04:58,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:04:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 04:04:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:04:58,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:58,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:04:58,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:58,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -959861890, now seen corresponding path program 1 times [2023-04-01 04:04:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570315078] [2023-04-01 04:04:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:58,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570315078] [2023-04-01 04:04:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570315078] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:58,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127257166] [2023-04-01 04:04:58,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:58,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:58,534 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) [2023-04-01 04:05:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:03,055 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 04:05:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:05:03,055 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 [2023-04-01 04:05:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:03,072 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 04:05:03,072 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 04:05:03,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:03,078 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s 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 [2023-04-01 04:05:03,078 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] [2023-04-01 04:05:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 04:05:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 04:05:03,148 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) [2023-04-01 04:05:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 04:05:03,158 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 04:05:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:03,158 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 04:05:03,158 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) [2023-04-01 04:05:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 04:05:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:05:03,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:03,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:05:03,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:03,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1638387174, now seen corresponding path program 1 times [2023-04-01 04:05:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233719637] [2023-04-01 04:05:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:03,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233719637] [2023-04-01 04:05:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233719637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:05:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470355864] [2023-04-01 04:05:03,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:03,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:05:03,334 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) [2023-04-01 04:05:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:07,986 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 04:05:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:05:07,987 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 [2023-04-01 04:05:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:08,014 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 04:05:08,014 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 04:05:08,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:08,028 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 04:05:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 04:05:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 04:05:08,175 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) [2023-04-01 04:05:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 04:05:08,193 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 04:05:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:08,194 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 04:05:08,194 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) [2023-04-01 04:05:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 04:05:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:05:08,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:08,195 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] [2023-04-01 04:05:08,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:05:08,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:08,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1640870803, now seen corresponding path program 1 times [2023-04-01 04:05:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:08,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850477887] [2023-04-01 04:05:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:08,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:05:08,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850477887] [2023-04-01 04:05:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850477887] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142356787] [2023-04-01 04:05:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:08,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:08,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:05:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:08,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:05:08,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:05:08,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:05:08,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142356787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:08,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:05:08,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:05:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629134722] [2023-04-01 04:05:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:08,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:08,577 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) [2023-04-01 04:05:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:13,187 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 04:05:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:05:13,188 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 [2023-04-01 04:05:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:13,242 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 04:05:13,242 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 04:05:13,262 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 [2023-04-01 04:05:13,266 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:13,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 04:05:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 04:05:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 04:05:13,565 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) [2023-04-01 04:05:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 04:05:13,596 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 04:05:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:13,596 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 04:05:13,596 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) [2023-04-01 04:05:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 04:05:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:05:13,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:13,605 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] [2023-04-01 04:05:13,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:05:13,811 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 [2023-04-01 04:05:13,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:13,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1501886762, now seen corresponding path program 1 times [2023-04-01 04:05:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:13,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030687126] [2023-04-01 04:05:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:13,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:14,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030687126] [2023-04-01 04:05:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030687126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:14,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:14,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:05:14,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942607674] [2023-04-01 04:05:14,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:05:14,276 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) [2023-04-01 04:05:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:18,233 INFO L93 Difference]: Finished difference Result 19883 states and 27228 transitions. [2023-04-01 04:05:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:05:18,234 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 [2023-04-01 04:05:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:18,286 INFO L225 Difference]: With dead ends: 19883 [2023-04-01 04:05:18,286 INFO L226 Difference]: Without dead ends: 11621 [2023-04-01 04:05:18,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:05:18,308 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1953 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 4651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:18,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 91 Invalid, 4651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 4309 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:05:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2023-04-01 04:05:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 11070. [2023-04-01 04:05:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11070 states, 10687 states have (on average 1.2480583886965473) internal successors, (13338), 10803 states have internal predecessors, (13338), 50 states have call successors, (50), 50 states have call predecessors, (50), 332 states have return successors, (1368), 216 states have call predecessors, (1368), 49 states have call successors, (1368) [2023-04-01 04:05:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11070 states to 11070 states and 14756 transitions. [2023-04-01 04:05:18,585 INFO L78 Accepts]: Start accepts. Automaton has 11070 states and 14756 transitions. Word has length 70 [2023-04-01 04:05:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:18,586 INFO L495 AbstractCegarLoop]: Abstraction has 11070 states and 14756 transitions. [2023-04-01 04:05:18,587 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) [2023-04-01 04:05:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11070 states and 14756 transitions. [2023-04-01 04:05:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 04:05:18,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:18,590 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] [2023-04-01 04:05:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:05:18,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:18,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1477903072, now seen corresponding path program 1 times [2023-04-01 04:05:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472105614] [2023-04-01 04:05:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:18,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:18,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472105614] [2023-04-01 04:05:18,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472105614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:18,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:18,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:05:18,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239960284] [2023-04-01 04:05:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:05:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:05:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:18,898 INFO L87 Difference]: Start difference. First operand 11070 states and 14756 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) [2023-04-01 04:05:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:21,974 INFO L93 Difference]: Finished difference Result 23540 states and 32689 transitions. [2023-04-01 04:05:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:05:21,975 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 [2023-04-01 04:05:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:22,027 INFO L225 Difference]: With dead ends: 23540 [2023-04-01 04:05:22,028 INFO L226 Difference]: Without dead ends: 13124 [2023-04-01 04:05:22,052 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 [2023-04-01 04:05:22,053 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 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, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:22,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:05:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13124 states. [2023-04-01 04:05:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13124 to 13060. [2023-04-01 04:05:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13060 states, 12656 states have (on average 1.2286662452591657) internal successors, (15550), 12775 states have internal predecessors, (15550), 59 states have call successors, (59), 59 states have call predecessors, (59), 344 states have return successors, (1560), 225 states have call predecessors, (1560), 58 states have call successors, (1560) [2023-04-01 04:05:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13060 states to 13060 states and 17169 transitions. [2023-04-01 04:05:22,320 INFO L78 Accepts]: Start accepts. Automaton has 13060 states and 17169 transitions. Word has length 75 [2023-04-01 04:05:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:22,322 INFO L495 AbstractCegarLoop]: Abstraction has 13060 states and 17169 transitions. [2023-04-01 04:05:22,322 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) [2023-04-01 04:05:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13060 states and 17169 transitions. [2023-04-01 04:05:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:05:22,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:22,325 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] [2023-04-01 04:05:22,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:05:22,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:22,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1994143112, now seen corresponding path program 1 times [2023-04-01 04:05:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:22,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994999663] [2023-04-01 04:05:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:22,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:05:22,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:22,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994999663] [2023-04-01 04:05:22,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994999663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:22,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:22,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:05:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427703393] [2023-04-01 04:05:22,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:05:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:05:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:22,554 INFO L87 Difference]: Start difference. First operand 13060 states and 17169 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) [2023-04-01 04:05:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:25,676 INFO L93 Difference]: Finished difference Result 32361 states and 44998 transitions. [2023-04-01 04:05:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:05:25,677 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 [2023-04-01 04:05:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:25,738 INFO L225 Difference]: With dead ends: 32361 [2023-04-01 04:05:25,738 INFO L226 Difference]: Without dead ends: 19955 [2023-04-01 04:05:25,770 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 [2023-04-01 04:05:25,771 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 674 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:25,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1264 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:05:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19955 states. [2023-04-01 04:05:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19955 to 19791. [2023-04-01 04:05:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19791 states, 19263 states have (on average 1.1825779992732182) internal successors, (22780), 19412 states have internal predecessors, (22780), 89 states have call successors, (89), 89 states have call predecessors, (89), 438 states have return successors, (2711), 289 states have call predecessors, (2711), 88 states have call successors, (2711) [2023-04-01 04:05:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19791 states to 19791 states and 25580 transitions. [2023-04-01 04:05:26,289 INFO L78 Accepts]: Start accepts. Automaton has 19791 states and 25580 transitions. Word has length 79 [2023-04-01 04:05:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:26,289 INFO L495 AbstractCegarLoop]: Abstraction has 19791 states and 25580 transitions. [2023-04-01 04:05:26,289 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) [2023-04-01 04:05:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19791 states and 25580 transitions. [2023-04-01 04:05:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:05:26,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:26,291 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] [2023-04-01 04:05:26,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:05:26,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:26,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1359827203, now seen corresponding path program 1 times [2023-04-01 04:05:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:26,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714877780] [2023-04-01 04:05:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 04:05:26,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:26,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714877780] [2023-04-01 04:05:26,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714877780] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:26,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491002086] [2023-04-01 04:05:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:26,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:26,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:05:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:26,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:05:26,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:05:26,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:05:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:05:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491002086] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:27,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:05:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:05:27,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415685701] [2023-04-01 04:05:27,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:27,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:27,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:27,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:05:27,195 INFO L87 Difference]: Start difference. First operand 19791 states and 25580 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) [2023-04-01 04:05:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:30,966 INFO L93 Difference]: Finished difference Result 55343 states and 74376 transitions. [2023-04-01 04:05:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:05:30,967 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 [2023-04-01 04:05:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:31,088 INFO L225 Difference]: With dead ends: 55343 [2023-04-01 04:05:31,089 INFO L226 Difference]: Without dead ends: 36191 [2023-04-01 04:05:31,139 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 [2023-04-01 04:05:31,139 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2544 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 1014 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2544 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:31,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2544 Valid, 80 Invalid, 4421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1014 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:05:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36191 states. [2023-04-01 04:05:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36191 to 35385. [2023-04-01 04:05:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35385 states, 34242 states have (on average 1.1533496875182525) internal successors, (39493), 34614 states have internal predecessors, (39493), 156 states have call successors, (156), 156 states have call predecessors, (156), 986 states have return successors, (6145), 614 states have call predecessors, (6145), 155 states have call successors, (6145) [2023-04-01 04:05:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35385 states to 35385 states and 45794 transitions. [2023-04-01 04:05:32,107 INFO L78 Accepts]: Start accepts. Automaton has 35385 states and 45794 transitions. Word has length 85 [2023-04-01 04:05:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:32,108 INFO L495 AbstractCegarLoop]: Abstraction has 35385 states and 45794 transitions. [2023-04-01 04:05:32,109 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) [2023-04-01 04:05:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 35385 states and 45794 transitions. [2023-04-01 04:05:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 04:05:32,114 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:32,114 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:32,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:05:32,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 04:05:32,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:32,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2094080729, now seen corresponding path program 1 times [2023-04-01 04:05:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861501209] [2023-04-01 04:05:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:32,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:32,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861501209] [2023-04-01 04:05:32,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861501209] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049508027] [2023-04-01 04:05:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:32,520 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) [2023-04-01 04:05:32,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:05:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:32,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:05:32,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:32,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:05:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:32,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049508027] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:05:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203722481] [2023-04-01 04:05:32,853 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 04:05:32,854 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:05:32,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:05:32,863 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:05:32,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:05:32,988 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs