/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/Problem19_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:29:43,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:29:43,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:29:43,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:29:43,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:29:43,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:29:43,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:29:43,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:29:43,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:29:43,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:29:43,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:29:43,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:29:43,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:29:43,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:29:43,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:29:43,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:29:43,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:29:43,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:29:43,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:29:43,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:29:43,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:29:43,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:29:43,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:29:43,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:29:43,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:29:43,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:29:43,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:29:43,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:29:43,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:29:43,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:29:43,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:29:43,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:29:43,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:29:43,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:29:43,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:29:43,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:29:43,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:29:43,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:29:43,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:29:43,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:29:43,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:29:43,699 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 04:29:43,723 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:29:43,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:29:43,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:29:43,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:29:43,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:29:43,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:29:43,724 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:29:43,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:29:43,724 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:29:43,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:29:43,725 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:29:43,725 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:29:43,725 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:29:43,725 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:29:43,726 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:29:43,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:29:43,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:29:43,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:29:43,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:43,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:29:43,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:29:43,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:29:44,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:29:44,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:29:44,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:29:44,021 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:29:44,021 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:29:44,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label05.c [2023-04-01 04:29:45,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:29:45,931 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:29:45,932 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label05.c [2023-04-01 04:29:45,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33897cd1b/ffa9d162e84143e695f2fc9f36749137/FLAGe09814942 [2023-04-01 04:29:45,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33897cd1b/ffa9d162e84143e695f2fc9f36749137 [2023-04-01 04:29:45,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:29:46,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:29:46,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:46,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:29:46,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:29:46,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:45" (1/1) ... [2023-04-01 04:29:46,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7631b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:46, skipping insertion in model container [2023-04-01 04:29:46,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:45" (1/1) ... [2023-04-01 04:29:46,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:29:46,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:29:46,424 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_label05.c[7789,7802] [2023-04-01 04:29:47,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:47,283 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:29:47,308 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_label05.c[7789,7802] [2023-04-01 04:29:47,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:47,891 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:29:47,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47 WrapperNode [2023-04-01 04:29:47,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:47,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:29:47,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:29:47,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:29:47,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:47,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:47,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:47,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:29:48,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:29:48,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:29:48,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:29:48,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (1/1) ... [2023-04-01 04:29:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:48,391 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 04:29:48,405 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 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:29:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:29:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:29:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:29:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:29:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:29:48,493 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:29:48,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:29:54,047 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:08,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:08,433 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:08,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:08 BoogieIcfgContainer [2023-04-01 04:30:08,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:08,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:08,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:08,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:08,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:29:45" (1/3) ... [2023-04-01 04:30:08,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277898a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:08, skipping insertion in model container [2023-04-01 04:30:08,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:47" (2/3) ... [2023-04-01 04:30:08,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277898a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:08, skipping insertion in model container [2023-04-01 04:30:08,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:08" (3/3) ... [2023-04-01 04:30:08,457 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label05.c [2023-04-01 04:30:08,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:08,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:08,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:08,595 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;@372dd251, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:08,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:08,603 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) [2023-04-01 04:30:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:08,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:08,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:08,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:08,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1432419268, now seen corresponding path program 1 times [2023-04-01 04:30:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:08,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491795736] [2023-04-01 04:30:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:08,942 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 04:30:08,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491795736] [2023-04-01 04:30:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491795736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:08,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:30:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189386327] [2023-04-01 04:30:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:30:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:30:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:08,983 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) [2023-04-01 04:30:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:13,768 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:30:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:30:13,771 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 04:30:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:13,799 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:30:13,799 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:30:13,810 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 04:30:13,812 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:13,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-04-01 04:30:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:30:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:30:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 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) [2023-04-01 04:30:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 04:30:13,919 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 04:30:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:13,920 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 04:30:13,920 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 04:30:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 04:30:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:30:13,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:13,922 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] [2023-04-01 04:30:13,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:30:13,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:13,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash -297735448, now seen corresponding path program 1 times [2023-04-01 04:30:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:13,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124025888] [2023-04-01 04:30:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:14,172 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 04:30:14,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124025888] [2023-04-01 04:30:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124025888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:14,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:14,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:14,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654804001] [2023-04-01 04:30:14,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:14,177 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:30:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:20,376 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 04:30:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:20,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:30:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:20,435 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 04:30:20,435 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 04:30:20,443 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 04:30:20,456 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:20,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 04:30:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 04:30:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 04:30:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 04:30:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 04:30:20,629 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 04:30:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:20,629 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 04:30:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:30:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 04:30:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:30:20,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:20,630 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] [2023-04-01 04:30:20,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:30:20,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:20,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash 595726048, now seen corresponding path program 1 times [2023-04-01 04:30:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:20,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507347012] [2023-04-01 04:30:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:20,736 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 04:30:20,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507347012] [2023-04-01 04:30:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507347012] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:20,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:20,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:20,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756023870] [2023-04-01 04:30:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:20,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:20,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:20,738 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:30:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:28,277 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 04:30:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 04:30:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:28,345 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 04:30:28,345 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 04:30:28,366 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 04:30:28,369 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3801 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:28,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 184 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 04:30:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 04:30:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 04:30:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 04:30:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 04:30:28,542 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 04:30:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:28,542 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 04:30:28,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:30:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 04:30:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:30:28,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:28,543 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] [2023-04-01 04:30:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:30:28,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:28,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1051888936, now seen corresponding path program 1 times [2023-04-01 04:30:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129966767] [2023-04-01 04:30:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:28,625 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 04:30:28,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129966767] [2023-04-01 04:30:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129966767] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:28,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:28,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:28,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189490076] [2023-04-01 04:30:28,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:28,627 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 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) [2023-04-01 04:30:36,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:30:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:36,133 INFO L93 Difference]: Finished difference Result 25277 states and 41484 transitions. [2023-04-01 04:30:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:36,134 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 33 [2023-04-01 04:30:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:36,224 INFO L225 Difference]: With dead ends: 25277 [2023-04-01 04:30:36,224 INFO L226 Difference]: Without dead ends: 17026 [2023-04-01 04:30:36,273 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 04:30:36,277 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 5996 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5996 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:36,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5996 Valid, 146 Invalid, 7175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 04:30:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2023-04-01 04:30:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 16791. [2023-04-01 04:30:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 16256 states have (on average 1.4953248031496063) internal successors, (24308), 16346 states have internal predecessors, (24308), 74 states have call successors, (74), 74 states have call predecessors, (74), 460 states have return successors, (2019), 370 states have call predecessors, (2019), 73 states have call successors, (2019) [2023-04-01 04:30:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 26401 transitions. [2023-04-01 04:30:36,837 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 26401 transitions. Word has length 33 [2023-04-01 04:30:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:36,837 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 26401 transitions. [2023-04-01 04:30:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-04-01 04:30:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 26401 transitions. [2023-04-01 04:30:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 04:30:36,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:36,839 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] [2023-04-01 04:30:36,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:30:36,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:36,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:36,839 INFO L85 PathProgramCache]: Analyzing trace with hash 918353730, now seen corresponding path program 1 times [2023-04-01 04:30:36,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:36,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006493945] [2023-04-01 04:30:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:36,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:36,958 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 04:30:36,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:36,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006493945] [2023-04-01 04:30:36,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006493945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:36,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:36,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033706868] [2023-04-01 04:30:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:36,960 INFO L87 Difference]: Start difference. First operand 16791 states and 26401 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 04:30:46,267 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 [] [2023-04-01 04:30:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:47,390 INFO L93 Difference]: Finished difference Result 49700 states and 79392 transitions. [2023-04-01 04:30:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 53 [2023-04-01 04:30:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:47,524 INFO L225 Difference]: With dead ends: 49700 [2023-04-01 04:30:47,524 INFO L226 Difference]: Without dead ends: 32914 [2023-04-01 04:30:47,562 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 04:30:47,562 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 3809 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7227 mSolverCounterSat, 1777 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3809 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 9005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1777 IncrementalHoareTripleChecker+Valid, 7227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:47,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3809 Valid, 197 Invalid, 9005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1777 Valid, 7227 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-04-01 04:30:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32914 states. [2023-04-01 04:30:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32914 to 27058. [2023-04-01 04:30:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27058 states, 25964 states have (on average 1.3549144969958404) internal successors, (35179), 26172 states have internal predecessors, (35179), 115 states have call successors, (115), 115 states have call predecessors, (115), 978 states have return successors, (4238), 770 states have call predecessors, (4238), 114 states have call successors, (4238) [2023-04-01 04:30:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27058 states to 27058 states and 39532 transitions. [2023-04-01 04:30:48,282 INFO L78 Accepts]: Start accepts. Automaton has 27058 states and 39532 transitions. Word has length 53 [2023-04-01 04:30:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:48,283 INFO L495 AbstractCegarLoop]: Abstraction has 27058 states and 39532 transitions. [2023-04-01 04:30:48,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 04:30:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27058 states and 39532 transitions. [2023-04-01 04:30:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:30:48,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:48,290 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:30:48,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:48,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash -896850745, now seen corresponding path program 1 times [2023-04-01 04:30:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:48,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001555764] [2023-04-01 04:30:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 04:30:48,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001555764] [2023-04-01 04:30:48,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001555764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:30:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767342385] [2023-04-01 04:30:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:48,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:30:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:30:48,480 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 04:30:48,482 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 04:30:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:48,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:30:48,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:30:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 04:30:48,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:30:48,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767342385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:48,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:30:48,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:30:48,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199591164] [2023-04-01 04:30:48,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:48,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:30:48,705 INFO L87 Difference]: Start difference. First operand 27058 states and 39532 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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)