/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:30:23,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:30:23,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:30:23,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:30:23,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:30:23,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:30:23,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:30:23,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:30:23,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:30:23,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:30:23,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:30:23,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:30:23,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:30:23,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:30:23,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:30:23,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:30:23,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:30:23,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:30:23,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:30:23,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:30:23,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:30:23,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:30:23,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:30:23,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:30:23,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:30:23,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:30:23,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:30:23,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:30:23,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:30:23,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:30:23,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:30:23,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:30:23,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:30:23,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:30:23,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:30:23,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:30:23,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:30:23,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:30:23,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:30:23,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:30:23,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:30:23,656 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 [2023-03-31 22:30:23,689 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:30:23,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:30:23,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:30:23,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:30:23,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:30:23,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:30:23,691 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:30:23,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:30:23,691 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:30:23,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:30:23,692 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:30:23,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:30:23,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:30:23,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:30:23,692 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:30:23,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:30:23,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:30:23,693 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:30:23,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:30:23,693 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:30:23,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:30:23,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:30:23,695 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:30:23,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:30:23,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:30:23,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:30:23,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:23,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:30:23,695 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:30:23,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:30:23,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:30:23,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:30:23,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:30:23,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:30:23,957 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:30:23,957 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:30:23,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-03-31 22:30:25,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:30:25,675 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:30:25,676 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-03-31 22:30:25,721 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b677fa31a/753557f12ff74fba8fb74e17bb719bc5/FLAGd13884878 [2023-03-31 22:30:25,739 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b677fa31a/753557f12ff74fba8fb74e17bb719bc5 [2023-03-31 22:30:25,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:30:25,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:30:25,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:25,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:30:25,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:30:25,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d08e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25, skipping insertion in model container [2023-03-31 22:30:25,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:30:25,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:30:26,228 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/Problem19_label16.c[6966,6979] [2023-03-31 22:30:27,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:27,311 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:30:27,341 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/Problem19_label16.c[6966,6979] [2023-03-31 22:30:28,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:28,038 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:30:28,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28 WrapperNode [2023-03-31 22:30:28,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:28,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:30:28,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:30:28,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:30:28,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,382 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:30:28,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:30:28,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:30:28,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:30:28,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (1/1) ... [2023-03-31 22:30:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:30:28,618 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) [2023-03-31 22:30:28,645 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 [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:30:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:30:28,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:30:28,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:30:28,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:30:28,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:30:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:30:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:30:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:30:28,754 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:30:28,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:30:36,084 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:30:50,827 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:30:50,828 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:30:50,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:50 BoogieIcfgContainer [2023-03-31 22:30:50,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:30:50,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:30:50,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:30:50,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:30:50,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:30:25" (1/3) ... [2023-03-31 22:30:50,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37df8cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:50, skipping insertion in model container [2023-03-31 22:30:50,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:28" (2/3) ... [2023-03-31 22:30:50,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37df8cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:50, skipping insertion in model container [2023-03-31 22:30:50,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:50" (3/3) ... [2023-03-31 22:30:50,840 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label16.c [2023-03-31 22:30:50,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:30:50,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:30:50,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:30:50,944 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;@3b456741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:30:50,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:30:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:30:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:30:50,960 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:50,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:30:50,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:50,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:50,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1235903971, now seen corresponding path program 1 times [2023-03-31 22:30:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:50,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224513982] [2023-03-31 22:30:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:51,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224513982] [2023-03-31 22:30:51,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224513982] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:51,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:30:51,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155896316] [2023-03-31 22:30:51,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:30:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:30:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:51,570 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2023-03-31 22:30:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:57,923 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:30:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:30:57,925 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 [2023-03-31 22:30:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:57,953 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:30:57,953 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:30:57,964 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 [2023-03-31 22:30:57,967 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:57,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-31 22:30:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:30:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:30:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:30:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-03-31 22:30:58,109 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-03-31 22:30:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-03-31 22:30:58,109 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) [2023-03-31 22:30:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-03-31 22:30:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:30:58,111 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:58,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:30:58,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:30:58,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:58,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash 606602702, now seen corresponding path program 1 times [2023-03-31 22:30:58,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230414941] [2023-03-31 22:30:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:58,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:58,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:58,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230414941] [2023-03-31 22:30:58,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230414941] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:58,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139460925] [2023-03-31 22:30:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:58,335 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 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) [2023-03-31 22:31:08,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:31:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:08,609 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-03-31 22:31:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:08,610 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 [2023-03-31 22:31:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:08,633 INFO L225 Difference]: With dead ends: 6943 [2023-03-31 22:31:08,633 INFO L226 Difference]: Without dead ends: 4679 [2023-03-31 22:31:08,715 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 [2023-03-31 22:31:08,716 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6592 mSolverCounterSat, 1794 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6592 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:08,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6592 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-03-31 22:31:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-03-31 22:31:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-03-31 22:31:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-03-31 22:31:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-03-31 22:31:08,863 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-03-31 22:31:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:08,863 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-03-31 22:31:08,864 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) [2023-03-31 22:31:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-03-31 22:31:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:31:08,865 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:08,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:31:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:31:08,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:08,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash -35254791, now seen corresponding path program 1 times [2023-03-31 22:31:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519587982] [2023-03-31 22:31:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:08,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:31:09,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519587982] [2023-03-31 22:31:09,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519587982] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:09,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:09,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579544362] [2023-03-31 22:31:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:09,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:09,055 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 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) [2023-03-31 22:31:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:15,647 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-03-31 22:31:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:31:15,647 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 [2023-03-31 22:31:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:15,685 INFO L225 Difference]: With dead ends: 14148 [2023-03-31 22:31:15,685 INFO L226 Difference]: Without dead ends: 9546 [2023-03-31 22:31:15,695 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 [2023-03-31 22:31:15,696 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:15,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-31 22:31:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-03-31 22:31:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-03-31 22:31:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-03-31 22:31:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-03-31 22:31:15,892 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-03-31 22:31:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:15,893 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-03-31 22:31:15,893 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) [2023-03-31 22:31:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-03-31 22:31:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:31:15,894 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:15,895 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] [2023-03-31 22:31:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:31:15,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:15,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash 690383599, now seen corresponding path program 1 times [2023-03-31 22:31:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708799394] [2023-03-31 22:31:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:31:16,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708799394] [2023-03-31 22:31:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708799394] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:16,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691390898] [2023-03-31 22:31:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:16,036 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)