/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:18:52,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:18:52,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:18:52,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:18:52,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:18:52,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:18:52,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:18:52,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:18:52,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:18:52,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:18:52,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:18:52,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:18:52,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:18:52,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:18:52,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:18:52,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:18:52,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:18:52,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:18:52,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:18:52,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:18:52,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:18:52,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:18:52,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:18:52,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:18:52,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:18:52,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:18:52,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:18:52,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:18:52,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:18:52,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:18:52,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:18:52,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:18:52,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:18:52,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:18:52,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:18:52,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:18:52,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:18:52,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:18:52,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:18:52,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:18:52,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:18:52,519 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 10:18:52,547 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:18:52,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:18:52,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:18:52,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:18:52,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:18:52,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:18:52,549 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:18:52,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:18:52,549 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:18:52,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:18:52,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:18:52,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:18:52,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:18:52,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:18:52,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:18:52,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:18:52,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:18:52,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:18:52,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:18:52,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:18:52,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:18:52,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:18:52,768 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:18:52,770 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:18:52,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label56.c [2023-04-01 10:18:53,825 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:18:54,068 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:18:54,068 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label56.c [2023-04-01 10:18:54,078 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396f9c12f/480ba04e391a40c6bff5b94c277c02ff/FLAG68172fd41 [2023-04-01 10:18:54,088 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396f9c12f/480ba04e391a40c6bff5b94c277c02ff [2023-04-01 10:18:54,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:18:54,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:18:54,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:18:54,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:18:54,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:18:54,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123cbe47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54, skipping insertion in model container [2023-04-01 10:18:54,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:18:54,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:18:54,257 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/Problem15_label56.c[4182,4195] [2023-04-01 10:18:54,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:18:54,664 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:18:54,693 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/Problem15_label56.c[4182,4195] [2023-04-01 10:18:54,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:18:54,837 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:18:54,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54 WrapperNode [2023-04-01 10:18:54,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:18:54,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:18:54,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:18:54,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:18:54,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:18:54,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:18:54,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:18:54,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:18:54,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (1/1) ... [2023-04-01 10:18:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:18:54,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:18:55,014 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 10:18:55,032 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 10:18:55,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:18:55,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:18:55,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:18:55,042 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:18:55,042 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:18:55,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:18:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:18:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:18:55,094 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:18:55,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:18:56,669 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:18:57,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:18:57,186 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:18:57,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:18:57 BoogieIcfgContainer [2023-04-01 10:18:57,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:18:57,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:18:57,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:18:57,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:18:57,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:18:54" (1/3) ... [2023-04-01 10:18:57,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fd8fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:18:57, skipping insertion in model container [2023-04-01 10:18:57,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:54" (2/3) ... [2023-04-01 10:18:57,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fd8fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:18:57, skipping insertion in model container [2023-04-01 10:18:57,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:18:57" (3/3) ... [2023-04-01 10:18:57,195 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label56.c [2023-04-01 10:18:57,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:18:57,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:18:57,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:18:57,254 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;@3f387b66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:18:57,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:18:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:18:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:18:57,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:18:57,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:18:57,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:18:57,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:18:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 271516611, now seen corresponding path program 1 times [2023-04-01 10:18:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:18:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161695487] [2023-04-01 10:18:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:18:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:57,514 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 10:18:57,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:18:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161695487] [2023-04-01 10:18:57,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161695487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:18:57,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:18:57,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:18:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050647770] [2023-04-01 10:18:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:18:57,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:18:57,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:18:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:18:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:18:57,547 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 10:18:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:18:58,704 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-04-01 10:18:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:18:58,706 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 10:18:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:18:58,715 INFO L225 Difference]: With dead ends: 720 [2023-04-01 10:18:58,715 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 10:18:58,719 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 10:18:58,721 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:18:58,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 10:18:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 10:18:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-04-01 10:18:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 10:18:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-04-01 10:18:58,762 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-04-01 10:18:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:18:58,762 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-04-01 10:18:58,762 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 10:18:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-04-01 10:18:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:18:58,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:18:58,763 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] [2023-04-01 10:18:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:18:58,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:18:58,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:18:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1627330926, now seen corresponding path program 1 times [2023-04-01 10:18:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:18:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870691664] [2023-04-01 10:18:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:18:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:58,901 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 10:18:58,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:18:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870691664] [2023-04-01 10:18:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870691664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:18:58,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:18:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:18:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860269318] [2023-04-01 10:18:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:18:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:18:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:18:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:18:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:18:58,904 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:19:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:19:01,375 INFO L93 Difference]: Finished difference Result 1428 states and 2282 transitions. [2023-04-01 10:19:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:19:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:19:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:19:01,380 INFO L225 Difference]: With dead ends: 1428 [2023-04-01 10:19:01,380 INFO L226 Difference]: Without dead ends: 960 [2023-04-01 10:19:01,381 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 10:19:01,382 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 672 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:19:01,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 58 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 10:19:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-04-01 10:19:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 940. [2023-04-01 10:19:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.4912663755458515) internal successors, (1366), 924 states have internal predecessors, (1366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 10:19:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1406 transitions. [2023-04-01 10:19:01,417 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1406 transitions. Word has length 31 [2023-04-01 10:19:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:19:01,417 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1406 transitions. [2023-04-01 10:19:01,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:19:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1406 transitions. [2023-04-01 10:19:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:19:01,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:19:01,419 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] [2023-04-01 10:19:01,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:19:01,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:19:01,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:19:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash 319662474, now seen corresponding path program 1 times [2023-04-01 10:19:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:19:01,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103649776] [2023-04-01 10:19:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:19:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:19:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:19:01,534 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 10:19:01,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:19:01,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103649776] [2023-04-01 10:19:01,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103649776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:19:01,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:19:01,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:19:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158675425] [2023-04-01 10:19:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:19:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:19:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:19:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:19:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:19:01,538 INFO L87 Difference]: Start difference. First operand 940 states and 1406 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:19:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:19:03,169 INFO L93 Difference]: Finished difference Result 2858 states and 4368 transitions. [2023-04-01 10:19:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:19:03,170 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-04-01 10:19:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:19:03,178 INFO L225 Difference]: With dead ends: 2858 [2023-04-01 10:19:03,178 INFO L226 Difference]: Without dead ends: 1923 [2023-04-01 10:19:03,182 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 10:19:03,184 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:19:03,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:19:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-04-01 10:19:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-04-01 10:19:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3422029702970297) internal successors, (2169), 1640 states have internal predecessors, (2169), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-01 10:19:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2264 transitions. [2023-04-01 10:19:03,232 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2264 transitions. Word has length 35 [2023-04-01 10:19:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:19:03,232 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2264 transitions. [2023-04-01 10:19:03,232 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:19:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2264 transitions. [2023-04-01 10:19:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 10:19:03,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:19:03,241 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:19:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:19:03,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:19:03,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:19:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash -762409493, now seen corresponding path program 1 times [2023-04-01 10:19:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:19:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521039984] [2023-04-01 10:19:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:19:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:19:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:19:03,522 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 10:19:03,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:19:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521039984] [2023-04-01 10:19:03,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521039984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:19:03,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:19:03,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:19:03,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943172640] [2023-04-01 10:19:03,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:19:03,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:19:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:19:03,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:19:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:19:03,524 INFO L87 Difference]: Start difference. First operand 1666 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:19:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:19:04,601 INFO L93 Difference]: Finished difference Result 4256 states and 5999 transitions. [2023-04-01 10:19:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:19:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-04-01 10:19:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:19:04,609 INFO L225 Difference]: With dead ends: 4256 [2023-04-01 10:19:04,609 INFO L226 Difference]: Without dead ends: 2595 [2023-04-01 10:19:04,611 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 10:19:04,612 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:19:04,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 10:19:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-04-01 10:19:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-04-01 10:19:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.2676458588331294) internal successors, (3107), 2479 states have internal predecessors, (3107), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-04-01 10:19:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3266 transitions. [2023-04-01 10:19:04,656 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3266 transitions. Word has length 152 [2023-04-01 10:19:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:19:04,656 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3266 transitions. [2023-04-01 10:19:04,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:19:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3266 transitions. [2023-04-01 10:19:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-04-01 10:19:04,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:19:04,659 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, 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, 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, 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 10:19:04,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:19:04,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:19:04,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:19:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2026698270, now seen corresponding path program 1 times [2023-04-01 10:19:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:19:04,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884794600] [2023-04-01 10:19:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:19:04,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:19:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:19:05,017 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 10:19:05,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:19:05,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884794600] [2023-04-01 10:19:05,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884794600] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:19:05,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:19:05,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:19:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4041194] [2023-04-01 10:19:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:19:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:19:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:19:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:19:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:19:05,021 INFO L87 Difference]: Start difference. First operand 2513 states and 3266 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:19:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:19:06,385 INFO L93 Difference]: Finished difference Result 5948 states and 8028 transitions. [2023-04-01 10:19:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:19:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 226 [2023-04-01 10:19:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:19:06,398 INFO L225 Difference]: With dead ends: 5948 [2023-04-01 10:19:06,399 INFO L226 Difference]: Without dead ends: 3440 [2023-04-01 10:19:06,405 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 10:19:06,409 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:19:06,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 455 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:19:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-04-01 10:19:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3170. [2023-04-01 10:19:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3096 states have (on average 1.2512919896640826) internal successors, (3874), 3128 states have internal predecessors, (3874), 21 states have call successors, (21), 21 states have call predecessors, (21), 52 states have return successors, (215), 20 states have call predecessors, (215), 20 states have call successors, (215) [2023-04-01 10:19:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4110 transitions. [2023-04-01 10:19:06,463 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4110 transitions. Word has length 226 [2023-04-01 10:19:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:19:06,464 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4110 transitions. [2023-04-01 10:19:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:19:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4110 transitions. [2023-04-01 10:19:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 10:19:06,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:19:06,467 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 10:19:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:19:06,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:19:06,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:19:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1469640741, now seen corresponding path program 1 times [2023-04-01 10:19:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:19:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389228195] [2023-04-01 10:19:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:19:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:19:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:19:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:19:06,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:19:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389228195] [2023-04-01 10:19:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389228195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:19:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977558464] [2023-04-01 10:19:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:19:06,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:19:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:19:06,897 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 10:19:06,901 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 10:19:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:19:07,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:19:07,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:19:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:19:07,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:19:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:19:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977558464] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:19:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461436482] [2023-04-01 10:19:07,374 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:19:07,374 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:19:07,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:19:07,379 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:19:07,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:19:07,667 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:19:08,123 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2023-04-01 10:19:21,016 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34