/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:04:57,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:04:57,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:04:57,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:04:57,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:04:57,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:04:57,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:04:57,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:04:57,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:04:57,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:04:57,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:04:57,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:04:57,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:04:57,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:04:57,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:04:57,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:04:57,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:04:57,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:04:57,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:04:57,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:04:57,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:04:57,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:04:57,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:04:57,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:04:57,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:04:57,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:04:57,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:04:57,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:04:57,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:04:57,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:04:57,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:04:57,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:04:57,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:04:57,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:04:57,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:04:57,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:04:57,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:04:57,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:04:57,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:04:57,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:04:57,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:04:57,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:04:57,783 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:04:57,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:04:57,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:04:57,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:04:57,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:04:57,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:04:57,785 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:04:57,786 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:04:57,786 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:04:57,786 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:04:57,786 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:04:57,786 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:04:57,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:04:57,787 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:04:57,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:57,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:04:57,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:04:57,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:04:57,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:04:57,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:04:58,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:04:58,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:04:58,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:04:58,039 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:04:58,039 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:04:58,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 04:04:59,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:04:59,616 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:04:59,616 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 04:04:59,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d348dca/d1f46320399146d0a3293ad739691c94/FLAGc1bb2e304 [2023-04-01 04:04:59,657 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d348dca/d1f46320399146d0a3293ad739691c94 [2023-04-01 04:04:59,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:04:59,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:04:59,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:59,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:04:59,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:04:59,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:59" (1/1) ... [2023-04-01 04:04:59,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e98a0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:59, skipping insertion in model container [2023-04-01 04:04:59,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:59" (1/1) ... [2023-04-01 04:04:59,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:04:59,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:05:00,093 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-04-01 04:05:01,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:05:01,261 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:05:01,293 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-04-01 04:05:01,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:05:01,670 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:05:01,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01 WrapperNode [2023-04-01 04:05:01,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:05:01,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:05:01,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:05:01,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:05:01,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:01,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:01,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:01,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:01,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:01,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:02,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:02,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:02,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:05:02,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:05:02,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:05:02,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:05:02,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (1/1) ... [2023-04-01 04:05:02,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:05:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:02,116 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 04:05:02,142 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 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:05:02,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:05:02,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:05:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:05:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:05:02,296 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:05:02,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:05:06,057 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:05:08,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:05:08,375 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:05:08,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:05:08 BoogieIcfgContainer [2023-04-01 04:05:08,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:05:08,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:05:08,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:05:08,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:05:08,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:04:59" (1/3) ... [2023-04-01 04:05:08,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d297354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:05:08, skipping insertion in model container [2023-04-01 04:05:08,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:05:01" (2/3) ... [2023-04-01 04:05:08,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d297354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:05:08, skipping insertion in model container [2023-04-01 04:05:08,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:05:08" (3/3) ... [2023-04-01 04:05:08,383 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2023-04-01 04:05:08,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:05:08,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:05:08,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:05:08,630 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;@52a494a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:05:08,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:05:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:05:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:05:08,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:08,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:08,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:08,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash -134422507, now seen corresponding path program 1 times [2023-04-01 04:05:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630709807] [2023-04-01 04:05:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:08,846 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 04:05:08,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:08,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630709807] [2023-04-01 04:05:08,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630709807] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:08,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:08,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:05:08,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994253409] [2023-04-01 04:05:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:05:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:05:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:08,871 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:05:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:11,775 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:05:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:05:11,779 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 04:05:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:11,815 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:05:11,815 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:05:11,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:11,829 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:11,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:05:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:05:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 04:05:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:05:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 04:05:11,959 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 04:05:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 04:05:11,960 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 04:05:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 04:05:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:05:11,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:11,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:11,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:05:11,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:11,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 242957030, now seen corresponding path program 1 times [2023-04-01 04:05:11,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476855163] [2023-04-01 04:05:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:12,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:12,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476855163] [2023-04-01 04:05:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476855163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:12,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:12,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:05:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571672975] [2023-04-01 04:05:12,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:12,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:05:12,108 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:15,328 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 04:05:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:05:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 04:05:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:15,353 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 04:05:15,354 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 04:05:15,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:15,364 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:15,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:05:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 04:05:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 04:05:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 04:05:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 04:05:15,514 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 04:05:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:15,514 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 04:05:15,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 04:05:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:05:15,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:15,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:05:15,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:15,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1338041918, now seen corresponding path program 1 times [2023-04-01 04:05:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973433575] [2023-04-01 04:05:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:15,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973433575] [2023-04-01 04:05:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973433575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:15,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:15,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:05:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496467504] [2023-04-01 04:05:15,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:05:15,795 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:20,014 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 04:05:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:05:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:05:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:20,054 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 04:05:20,054 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 04:05:20,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:20,064 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:20,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 04:05:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 04:05:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 04:05:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 04:05:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 04:05:20,195 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 04:05:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:20,196 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 04:05:20,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 04:05:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:05:20,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:20,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:05:20,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:20,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 372110531, now seen corresponding path program 1 times [2023-04-01 04:05:20,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642660418] [2023-04-01 04:05:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:05:20,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642660418] [2023-04-01 04:05:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642660418] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761171887] [2023-04-01 04:05:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:20,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:20,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:20,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:20,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:05:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:20,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:05:20,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:05:20,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:05:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761171887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:20,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:05:20,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:05:20,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595056] [2023-04-01 04:05:20,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:20,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:20,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:05:20,583 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:05:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:25,084 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 04:05:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:05:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-01 04:05:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:25,127 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 04:05:25,127 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 04:05:25,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:05:25,146 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:25,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 04:05:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 04:05:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 04:05:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 04:05:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 04:05:25,373 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 04:05:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:25,373 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 04:05:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:05:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 04:05:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:05:25,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:25,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:25,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:05:25,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:25,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:25,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash 67558718, now seen corresponding path program 1 times [2023-04-01 04:05:25,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:25,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550329843] [2023-04-01 04:05:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:26,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:26,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550329843] [2023-04-01 04:05:26,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550329843] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952079241] [2023-04-01 04:05:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:26,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:26,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:05:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:26,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:05:26,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:05:26,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:05:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952079241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:05:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 04:05:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116862705] [2023-04-01 04:05:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:05:26,424 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:30,080 INFO L93 Difference]: Finished difference Result 19718 states and 26889 transitions. [2023-04-01 04:05:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:05:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-01 04:05:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:30,127 INFO L225 Difference]: With dead ends: 19718 [2023-04-01 04:05:30,127 INFO L226 Difference]: Without dead ends: 11456 [2023-04-01 04:05:30,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:05:30,145 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1952 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:30,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1952 Valid, 117 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4517 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:05:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2023-04-01 04:05:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11052. [2023-04-01 04:05:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 10677 states have (on average 1.2482907183665823) internal successors, (13328), 10787 states have internal predecessors, (13328), 50 states have call successors, (50), 50 states have call predecessors, (50), 324 states have return successors, (1302), 214 states have call predecessors, (1302), 49 states have call successors, (1302) [2023-04-01 04:05:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 14680 transitions. [2023-04-01 04:05:30,329 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 14680 transitions. Word has length 70 [2023-04-01 04:05:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:30,330 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 14680 transitions. [2023-04-01 04:05:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:05:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 14680 transitions. [2023-04-01 04:05:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 04:05:30,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:30,333 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:30,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:05:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:30,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:30,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -838641500, now seen corresponding path program 1 times [2023-04-01 04:05:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:30,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769043355] [2023-04-01 04:05:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:30,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:30,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769043355] [2023-04-01 04:05:30,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769043355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:30,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:30,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:05:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556644699] [2023-04-01 04:05:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:05:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:05:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:30,692 INFO L87 Difference]: Start difference. First operand 11052 states and 14680 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:05:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:33,844 INFO L93 Difference]: Finished difference Result 23504 states and 32509 transitions. [2023-04-01 04:05:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:05:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2023-04-01 04:05:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:33,906 INFO L225 Difference]: With dead ends: 23504 [2023-04-01 04:05:33,906 INFO L226 Difference]: Without dead ends: 13106 [2023-04-01 04:05:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:33,936 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:33,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 04:05:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2023-04-01 04:05:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13042. [2023-04-01 04:05:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 12646 states have (on average 1.228847066266013) internal successors, (15540), 12759 states have internal predecessors, (15540), 59 states have call successors, (59), 59 states have call predecessors, (59), 336 states have return successors, (1489), 223 states have call predecessors, (1489), 58 states have call successors, (1489) [2023-04-01 04:05:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 17088 transitions. [2023-04-01 04:05:34,289 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 17088 transitions. Word has length 75 [2023-04-01 04:05:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:34,291 INFO L495 AbstractCegarLoop]: Abstraction has 13042 states and 17088 transitions. [2023-04-01 04:05:34,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:05:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 17088 transitions. [2023-04-01 04:05:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:05:34,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:34,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:05:34,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:34,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:34,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1408784508, now seen corresponding path program 1 times [2023-04-01 04:05:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:34,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078291894] [2023-04-01 04:05:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:34,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:05:34,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078291894] [2023-04-01 04:05:34,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078291894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:05:34,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:05:34,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:05:34,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480629090] [2023-04-01 04:05:34,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:34,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:05:34,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:34,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:05:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:34,549 INFO L87 Difference]: Start difference. First operand 13042 states and 17088 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:05:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:36,948 INFO L93 Difference]: Finished difference Result 32326 states and 44748 transitions. [2023-04-01 04:05:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:05:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:05:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:37,136 INFO L225 Difference]: With dead ends: 32326 [2023-04-01 04:05:37,137 INFO L226 Difference]: Without dead ends: 19938 [2023-04-01 04:05:37,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:05:37,153 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 674 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:37,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1264 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:05:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2023-04-01 04:05:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19774. [2023-04-01 04:05:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19774 states, 19254 states have (on average 1.18266334268204) internal successors, (22771), 19396 states have internal predecessors, (22771), 89 states have call successors, (89), 89 states have call predecessors, (89), 430 states have return successors, (2607), 288 states have call predecessors, (2607), 88 states have call successors, (2607) [2023-04-01 04:05:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 25467 transitions. [2023-04-01 04:05:37,425 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 25467 transitions. Word has length 79 [2023-04-01 04:05:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:37,425 INFO L495 AbstractCegarLoop]: Abstraction has 19774 states and 25467 transitions. [2023-04-01 04:05:37,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:05:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 25467 transitions. [2023-04-01 04:05:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:05:37,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:37,426 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:37,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:05:37,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:37,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash -192181067, now seen corresponding path program 1 times [2023-04-01 04:05:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:37,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51484391] [2023-04-01 04:05:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:37,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 04:05:37,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51484391] [2023-04-01 04:05:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51484391] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547277861] [2023-04-01 04:05:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:37,675 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:37,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:05:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:37,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:05:37,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:05:37,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:05:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:05:38,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547277861] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:38,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:05:38,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:05:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295375149] [2023-04-01 04:05:38,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:05:38,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:05:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:05:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:05:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:05:38,145 INFO L87 Difference]: Start difference. First operand 19774 states and 25467 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:05:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:05:41,295 INFO L93 Difference]: Finished difference Result 55249 states and 73903 transitions. [2023-04-01 04:05:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:05:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-04-01 04:05:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:05:41,394 INFO L225 Difference]: With dead ends: 55249 [2023-04-01 04:05:41,394 INFO L226 Difference]: Without dead ends: 36114 [2023-04-01 04:05:41,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:05:41,435 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1619 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:05:41,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 99 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:05:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36114 states. [2023-04-01 04:05:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36114 to 35333. [2023-04-01 04:05:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35333 states, 34213 states have (on average 1.1534796714699092) internal successors, (39464), 34568 states have internal predecessors, (39464), 156 states have call successors, (156), 156 states have call predecessors, (156), 963 states have return successors, (5961), 608 states have call predecessors, (5961), 155 states have call successors, (5961) [2023-04-01 04:05:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35333 states to 35333 states and 45581 transitions. [2023-04-01 04:05:41,949 INFO L78 Accepts]: Start accepts. Automaton has 35333 states and 45581 transitions. Word has length 85 [2023-04-01 04:05:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:05:41,952 INFO L495 AbstractCegarLoop]: Abstraction has 35333 states and 45581 transitions. [2023-04-01 04:05:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:05:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35333 states and 45581 transitions. [2023-04-01 04:05:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 04:05:41,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:05:41,957 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:05:41,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:05:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:42,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:05:42,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:05:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1218376391, now seen corresponding path program 1 times [2023-04-01 04:05:42,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:05:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862775740] [2023-04-01 04:05:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:42,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:05:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:42,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:05:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862775740] [2023-04-01 04:05:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862775740] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:05:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145940541] [2023-04-01 04:05:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:05:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:05:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:05:42,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:05:42,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:05:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:42,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:05:42,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:42,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:05:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:42,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145940541] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:05:42,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718166026] [2023-04-01 04:05:42,881 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 04:05:42,882 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:05:42,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:05:42,887 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:05:42,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:05:42,996 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:05:43,077 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-04-01 04:05:43,430 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23148 conjuctions. This might take some time... [2023-04-01 04:05:44,665 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 482 conjuctions. [2023-04-01 04:05:53,890 WARN L223 SmtUtils]: Spent 7.79s on a formula simplification that was a NOOP. DAG size: 855 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)