/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:04:10,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:04:10,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:04:10,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:04:10,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:04:10,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:04:10,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:04:10,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:04:10,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:04:10,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:04:10,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:04:10,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:04:10,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:04:10,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:04:10,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:04:10,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:04:10,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:04:10,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:04:10,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:04:10,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:04:10,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:04:10,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:04:10,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:04:10,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:04:10,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:04:10,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:04:10,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:04:10,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:04:10,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:04:10,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:04:10,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:04:10,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:04:10,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:04:10,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:04:10,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:04:10,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:04:10,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:04:10,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:04:10,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:04:10,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:04:10,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:04:10,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:04:10,154 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:04:10,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:04:10,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:04:10,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:04:10,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:04:10,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:04:10,156 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:04:10,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:04:10,156 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:04:10,156 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:04:10,157 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:04:10,157 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:04:10,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:04:10,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:04:10,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:04:10,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:04:10,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:04:10,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:04:10,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:04:10,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:04:10,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:04:10,371 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:04:10,372 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:04:10,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label33.c [2023-03-31 22:04:11,485 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:04:11,905 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:04:11,906 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label33.c [2023-03-31 22:04:11,929 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5a68c813/aa57bdf7b342454390d6a19a93ccc74a/FLAG421597756 [2023-03-31 22:04:11,943 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5a68c813/aa57bdf7b342454390d6a19a93ccc74a [2023-03-31 22:04:11,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:04:11,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:04:11,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:04:11,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:04:11,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:04:11,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:04:11" (1/1) ... [2023-03-31 22:04:11,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1252c0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:11, skipping insertion in model container [2023-03-31 22:04:11,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:04:11" (1/1) ... [2023-03-31 22:04:11,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:04:12,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:04:12,271 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_label33.c[5177,5190] [2023-03-31 22:04:12,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:04:12,867 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:04:12,887 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_label33.c[5177,5190] [2023-03-31 22:04:13,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:04:13,241 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:04:13,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13 WrapperNode [2023-03-31 22:04:13,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:04:13,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:04:13,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:04:13,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:04:13,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:04:13,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:04:13,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:04:13,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:04:13,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (1/1) ... [2023-03-31 22:04:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:04:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:13,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:04:13,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:04:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:04:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:04:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:04:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:04:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:04:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:04:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:04:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:04:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:04:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:04:13,711 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:04:13,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:04:17,351 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:04:19,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:04:19,611 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:04:19,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:04:19 BoogieIcfgContainer [2023-03-31 22:04:19,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:04:19,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:04:19,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:04:19,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:04:19,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:04:11" (1/3) ... [2023-03-31 22:04:19,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b70a5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:04:19, skipping insertion in model container [2023-03-31 22:04:19,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:13" (2/3) ... [2023-03-31 22:04:19,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b70a5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:04:19, skipping insertion in model container [2023-03-31 22:04:19,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:04:19" (3/3) ... [2023-03-31 22:04:19,621 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label33.c [2023-03-31 22:04:19,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:04:19,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:04:19,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:04:19,697 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;@7096c4f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:04:19,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:04:19,704 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) [2023-03-31 22:04:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:04:19,710 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:19,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:19,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:19,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:19,715 INFO L85 PathProgramCache]: Analyzing trace with hash -330932684, now seen corresponding path program 1 times [2023-03-31 22:04:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407690548] [2023-03-31 22:04:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:20,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407690548] [2023-03-31 22:04:20,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407690548] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:20,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:20,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042142134] [2023-03-31 22:04:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:20,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:20,061 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) [2023-03-31 22:04:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:23,338 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:04:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:04:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:23,371 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:04:23,371 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:04:23,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:23,381 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 713 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:23,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 215 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:04:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:04:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-03-31 22:04:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.8465530022238696) internal successors, (2491), 1349 states have internal predecessors, (2491), 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) [2023-03-31 22:04:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2514 transitions. [2023-03-31 22:04:23,485 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2514 transitions. Word has length 11 [2023-03-31 22:04:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:23,486 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2514 transitions. [2023-03-31 22:04:23,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:04:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2514 transitions. [2023-03-31 22:04:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:04:23,487 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:23,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:23,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:04:23,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:23,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 373837021, now seen corresponding path program 1 times [2023-03-31 22:04:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177284618] [2023-03-31 22:04:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:23,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:23,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177284618] [2023-03-31 22:04:23,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177284618] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:23,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:23,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:23,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821311687] [2023-03-31 22:04:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:23,670 INFO L87 Difference]: Start difference. First operand 1367 states and 2514 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:27,583 INFO L93 Difference]: Finished difference Result 4166 states and 7684 transitions. [2023-03-31 22:04:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:04:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-03-31 22:04:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:27,595 INFO L225 Difference]: With dead ends: 4166 [2023-03-31 22:04:27,595 INFO L226 Difference]: Without dead ends: 2804 [2023-03-31 22:04:27,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:04:27,604 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2397 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3932 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:27,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 111 Invalid, 5090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3932 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 22:04:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2023-03-31 22:04:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2742. [2023-03-31 22:04:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2700 states have (on average 1.5640740740740742) internal successors, (4223), 2704 states have internal predecessors, (4223), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 22:04:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4312 transitions. [2023-03-31 22:04:27,695 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4312 transitions. Word has length 21 [2023-03-31 22:04:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:27,696 INFO L495 AbstractCegarLoop]: Abstraction has 2742 states and 4312 transitions. [2023-03-31 22:04:27,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4312 transitions. [2023-03-31 22:04:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:04:27,696 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:27,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:27,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:04:27,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:27,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -119617031, now seen corresponding path program 1 times [2023-03-31 22:04:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:27,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475622282] [2023-03-31 22:04:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:27,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:27,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475622282] [2023-03-31 22:04:27,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475622282] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:27,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:27,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658407127] [2023-03-31 22:04:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:27,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:27,847 INFO L87 Difference]: Start difference. First operand 2742 states and 4312 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:32,105 INFO L93 Difference]: Finished difference Result 8492 states and 13675 transitions. [2023-03-31 22:04:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:04:32,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-03-31 22:04:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:32,143 INFO L225 Difference]: With dead ends: 8492 [2023-03-31 22:04:32,143 INFO L226 Difference]: Without dead ends: 5755 [2023-03-31 22:04:32,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:04:32,151 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2173 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4957 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 4957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:32,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 128 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 4957 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-31 22:04:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2023-03-31 22:04:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5619. [2023-03-31 22:04:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5619 states, 5483 states have (on average 1.3913915739558635) internal successors, (7629), 5514 states have internal predecessors, (7629), 27 states have call successors, (27), 27 states have call predecessors, (27), 108 states have return successors, (423), 77 states have call predecessors, (423), 26 states have call successors, (423) [2023-03-31 22:04:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5619 states to 5619 states and 8079 transitions. [2023-03-31 22:04:32,359 INFO L78 Accepts]: Start accepts. Automaton has 5619 states and 8079 transitions. Word has length 23 [2023-03-31 22:04:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:32,360 INFO L495 AbstractCegarLoop]: Abstraction has 5619 states and 8079 transitions. [2023-03-31 22:04:32,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5619 states and 8079 transitions. [2023-03-31 22:04:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:04:32,361 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:32,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:32,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:04:32,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:32,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 28549005, now seen corresponding path program 1 times [2023-03-31 22:04:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015156047] [2023-03-31 22:04:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:32,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:32,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015156047] [2023-03-31 22:04:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015156047] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121721170] [2023-03-31 22:04:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:32,483 INFO L87 Difference]: Start difference. First operand 5619 states and 8079 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:36,775 INFO L93 Difference]: Finished difference Result 17146 states and 26271 transitions. [2023-03-31 22:04:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:04:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-03-31 22:04:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:36,822 INFO L225 Difference]: With dead ends: 17146 [2023-03-31 22:04:36,822 INFO L226 Difference]: Without dead ends: 11532 [2023-03-31 22:04:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:04:36,835 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2183 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4808 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 4808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:36,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2183 Valid, 112 Invalid, 5807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 4808 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:04:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2023-03-31 22:04:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 11126. [2023-03-31 22:04:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 10801 states have (on average 1.360799925932784) internal successors, (14698), 10895 states have internal predecessors, (14698), 51 states have call successors, (51), 51 states have call predecessors, (51), 273 states have return successors, (1656), 179 states have call predecessors, (1656), 50 states have call successors, (1656) [2023-03-31 22:04:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 16405 transitions. [2023-03-31 22:04:37,051 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 16405 transitions. Word has length 29 [2023-03-31 22:04:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:37,051 INFO L495 AbstractCegarLoop]: Abstraction has 11126 states and 16405 transitions. [2023-03-31 22:04:37,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:04:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 16405 transitions. [2023-03-31 22:04:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:04:37,053 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:37,053 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] [2023-03-31 22:04:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:04:37,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:37,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash 931328173, now seen corresponding path program 1 times [2023-03-31 22:04:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991980694] [2023-03-31 22:04:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:37,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:37,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991980694] [2023-03-31 22:04:37,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991980694] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:37,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:37,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:37,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395887281] [2023-03-31 22:04:37,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:37,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:37,140 INFO L87 Difference]: Start difference. First operand 11126 states and 16405 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-03-31 22:04:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:40,205 INFO L93 Difference]: Finished difference Result 23820 states and 35982 transitions. [2023-03-31 22:04:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:40,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 45 [2023-03-31 22:04:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:40,269 INFO L225 Difference]: With dead ends: 23820 [2023-03-31 22:04:40,269 INFO L226 Difference]: Without dead ends: 12699 [2023-03-31 22:04:40,294 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 [2023-03-31 22:04:40,296 INFO L413 NwaCegarLoop]: 1139 mSDtfsCounter, 694 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:40,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1167 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 2175 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:04:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12699 states. [2023-03-31 22:04:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12699 to 12375. [2023-03-31 22:04:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12375 states, 12038 states have (on average 1.2752118292075096) internal successors, (15351), 12132 states have internal predecessors, (15351), 57 states have call successors, (57), 57 states have call predecessors, (57), 279 states have return successors, (1633), 185 states have call predecessors, (1633), 56 states have call successors, (1633) [2023-03-31 22:04:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12375 states to 12375 states and 17041 transitions. [2023-03-31 22:04:40,564 INFO L78 Accepts]: Start accepts. Automaton has 12375 states and 17041 transitions. Word has length 45 [2023-03-31 22:04:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:40,564 INFO L495 AbstractCegarLoop]: Abstraction has 12375 states and 17041 transitions. [2023-03-31 22:04:40,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-03-31 22:04:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 12375 states and 17041 transitions. [2023-03-31 22:04:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 22:04:40,571 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:40,571 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] [2023-03-31 22:04:40,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:04:40,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:40,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1696631281, now seen corresponding path program 1 times [2023-03-31 22:04:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231535365] [2023-03-31 22:04:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:04:40,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231535365] [2023-03-31 22:04:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231535365] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:40,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460238951] [2023-03-31 22:04:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:40,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:40,694 INFO L87 Difference]: Start difference. First operand 12375 states and 17041 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:04:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:43,649 INFO L93 Difference]: Finished difference Result 30288 states and 42899 transitions. [2023-03-31 22:04:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 52 [2023-03-31 22:04:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:43,698 INFO L225 Difference]: With dead ends: 30288 [2023-03-31 22:04:43,698 INFO L226 Difference]: Without dead ends: 17918 [2023-03-31 22:04:43,722 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 [2023-03-31 22:04:43,722 INFO L413 NwaCegarLoop]: 1155 mSDtfsCounter, 689 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:43,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1181 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:04:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17918 states. [2023-03-31 22:04:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17918 to 17810. [2023-03-31 22:04:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17355 states have (on average 1.224949582252953) internal successors, (21259), 17482 states have internal predecessors, (21259), 81 states have call successors, (81), 81 states have call predecessors, (81), 373 states have return successors, (2651), 246 states have call predecessors, (2651), 80 states have call successors, (2651) [2023-03-31 22:04:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 23991 transitions. [2023-03-31 22:04:44,146 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 23991 transitions. Word has length 52 [2023-03-31 22:04:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:44,147 INFO L495 AbstractCegarLoop]: Abstraction has 17810 states and 23991 transitions. [2023-03-31 22:04:44,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:04:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 23991 transitions. [2023-03-31 22:04:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 22:04:44,149 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:44,150 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:04:44,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:04:44,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:44,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1050111783, now seen corresponding path program 1 times [2023-03-31 22:04:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:44,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249783430] [2023-03-31 22:04:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 22:04:44,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249783430] [2023-03-31 22:04:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249783430] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614991953] [2023-03-31 22:04:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:44,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:44,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:44,319 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) [2023-03-31 22:04:44,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:04:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:44,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 22:04:44,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:04:44,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:04:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:04:44,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614991953] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:44,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:04:44,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:04:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100217339] [2023-03-31 22:04:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:44,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:04:44,846 INFO L87 Difference]: Start difference. First operand 17810 states and 23991 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-03-31 22:04:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:48,932 INFO L93 Difference]: Finished difference Result 53834 states and 75439 transitions. [2023-03-31 22:04:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:04:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 77 [2023-03-31 22:04:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:49,028 INFO L225 Difference]: With dead ends: 53834 [2023-03-31 22:04:49,029 INFO L226 Difference]: Without dead ends: 36029 [2023-03-31 22:04:49,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:04:49,057 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2503 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 3653 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 3653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:49,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2503 Valid, 81 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 3653 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 22:04:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36029 states. [2023-03-31 22:04:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36029 to 35228. [2023-03-31 22:04:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35228 states, 34181 states have (on average 1.1784032064597292) internal successors, (40279), 34509 states have internal predecessors, (40279), 157 states have call successors, (157), 157 states have call predecessors, (157), 889 states have return successors, (6898), 561 states have call predecessors, (6898), 156 states have call successors, (6898) [2023-03-31 22:04:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35228 states to 35228 states and 47334 transitions. [2023-03-31 22:04:49,645 INFO L78 Accepts]: Start accepts. Automaton has 35228 states and 47334 transitions. Word has length 77 [2023-03-31 22:04:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:49,647 INFO L495 AbstractCegarLoop]: Abstraction has 35228 states and 47334 transitions. [2023-03-31 22:04:49,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-03-31 22:04:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 35228 states and 47334 transitions. [2023-03-31 22:04:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-03-31 22:04:49,648 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:49,648 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:49,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:04:49,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:49,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:49,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash 279167626, now seen corresponding path program 1 times [2023-03-31 22:04:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:49,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417224762] [2023-03-31 22:04:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:49,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 22:04:49,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417224762] [2023-03-31 22:04:49,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417224762] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:49,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:49,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429216836] [2023-03-31 22:04:49,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:49,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:49,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:49,988 INFO L87 Difference]: Start difference. First operand 35228 states and 47334 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 22:04:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:53,108 INFO L93 Difference]: Finished difference Result 85658 states and 117650 transitions. [2023-03-31 22:04:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 93 [2023-03-31 22:04:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:53,251 INFO L225 Difference]: With dead ends: 85658 [2023-03-31 22:04:53,251 INFO L226 Difference]: Without dead ends: 50435 [2023-03-31 22:04:53,290 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 [2023-03-31 22:04:53,292 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 789 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:53,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 1068 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:04:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50435 states. [2023-03-31 22:04:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50435 to 47138. [2023-03-31 22:04:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47138 states, 46020 states have (on average 1.1669708822251195) internal successors, (53704), 46335 states have internal predecessors, (53704), 213 states have call successors, (213), 213 states have call predecessors, (213), 904 states have return successors, (8931), 589 states have call predecessors, (8931), 212 states have call successors, (8931) [2023-03-31 22:04:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47138 states to 47138 states and 62848 transitions. [2023-03-31 22:04:54,054 INFO L78 Accepts]: Start accepts. Automaton has 47138 states and 62848 transitions. Word has length 93 [2023-03-31 22:04:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:54,055 INFO L495 AbstractCegarLoop]: Abstraction has 47138 states and 62848 transitions. [2023-03-31 22:04:54,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 22:04:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47138 states and 62848 transitions. [2023-03-31 22:04:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-03-31 22:04:54,057 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:54,058 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 22:04:54,058 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:54,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1391901144, now seen corresponding path program 1 times [2023-03-31 22:04:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738359709] [2023-03-31 22:04:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:04:54,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738359709] [2023-03-31 22:04:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738359709] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637856921] [2023-03-31 22:04:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:54,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:54,262 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) [2023-03-31 22:04:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:04:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:54,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:04:54,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-03-31 22:04:54,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:04:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637856921] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:54,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:04:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:04:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591409851] [2023-03-31 22:04:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:54,539 INFO L87 Difference]: Start difference. First operand 47138 states and 62848 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-03-31 22:04:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:57,778 INFO L93 Difference]: Finished difference Result 95714 states and 129060 transitions. [2023-03-31 22:04:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 99 [2023-03-31 22:04:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:57,898 INFO L225 Difference]: With dead ends: 95714 [2023-03-31 22:04:57,898 INFO L226 Difference]: Without dead ends: 48581 [2023-03-31 22:04:57,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:57,941 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 856 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:57,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 932 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:04:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48581 states. [2023-03-31 22:04:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48581 to 48035. [2023-03-31 22:04:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48035 states, 46909 states have (on average 1.1456223752371613) internal successors, (53740), 47223 states have internal predecessors, (53740), 219 states have call successors, (219), 219 states have call predecessors, (219), 906 states have return successors, (7734), 592 states have call predecessors, (7734), 218 states have call successors, (7734) [2023-03-31 22:04:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48035 states to 48035 states and 61693 transitions. [2023-03-31 22:04:58,660 INFO L78 Accepts]: Start accepts. Automaton has 48035 states and 61693 transitions. Word has length 99 [2023-03-31 22:04:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:58,661 INFO L495 AbstractCegarLoop]: Abstraction has 48035 states and 61693 transitions. [2023-03-31 22:04:58,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-03-31 22:04:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48035 states and 61693 transitions. [2023-03-31 22:04:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 22:04:58,671 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:58,671 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 22:04:58,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:04:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-31 22:04:58,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:58,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1735871932, now seen corresponding path program 1 times [2023-03-31 22:04:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:58,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63710474] [2023-03-31 22:04:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-31 22:04:59,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63710474] [2023-03-31 22:04:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63710474] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:59,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557352521] [2023-03-31 22:04:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:59,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:59,220 INFO L87 Difference]: Start difference. First operand 48035 states and 61693 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-03-31 22:05:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:02,726 INFO L93 Difference]: Finished difference Result 111591 states and 146707 transitions. [2023-03-31 22:05:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:05:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 122 [2023-03-31 22:05:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:02,888 INFO L225 Difference]: With dead ends: 111591 [2023-03-31 22:05:02,888 INFO L226 Difference]: Without dead ends: 63561 [2023-03-31 22:05:02,932 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 [2023-03-31 22:05:02,933 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 684 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:02,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 580 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:05:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63561 states. [2023-03-31 22:05:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63561 to 59783. [2023-03-31 22:05:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59783 states, 58449 states have (on average 1.1315848004243014) internal successors, (66140), 58816 states have internal predecessors, (66140), 276 states have call successors, (276), 276 states have call predecessors, (276), 1057 states have return successors, (10128), 690 states have call predecessors, (10128), 275 states have call successors, (10128) [2023-03-31 22:05:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59783 states to 59783 states and 76544 transitions. [2023-03-31 22:05:04,253 INFO L78 Accepts]: Start accepts. Automaton has 59783 states and 76544 transitions. Word has length 122 [2023-03-31 22:05:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:04,253 INFO L495 AbstractCegarLoop]: Abstraction has 59783 states and 76544 transitions. [2023-03-31 22:05:04,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-03-31 22:05:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 59783 states and 76544 transitions. [2023-03-31 22:05:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 22:05:04,255 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:04,264 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] [2023-03-31 22:05:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 22:05:04,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:04,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 228771060, now seen corresponding path program 1 times [2023-03-31 22:05:04,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:04,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773021762] [2023-03-31 22:05:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:05:04,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:04,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773021762] [2023-03-31 22:05:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773021762] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:04,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:05:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338015534] [2023-03-31 22:05:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:05:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:05:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:05:04,401 INFO L87 Difference]: Start difference. First operand 59783 states and 76544 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-03-31 22:05:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:08,096 INFO L93 Difference]: Finished difference Result 134877 states and 175895 transitions. [2023-03-31 22:05:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:05:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 122 [2023-03-31 22:05:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:08,273 INFO L225 Difference]: With dead ends: 134877 [2023-03-31 22:05:08,273 INFO L226 Difference]: Without dead ends: 75099 [2023-03-31 22:05:08,323 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 [2023-03-31 22:05:08,323 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 685 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:08,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1206 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:05:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75099 states. [2023-03-31 22:05:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75099 to 73497. [2023-03-31 22:05:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73497 states, 71999 states have (on average 1.119862775871887) internal successors, (80629), 72396 states have internal predecessors, (80629), 340 states have call successors, (340), 340 states have call predecessors, (340), 1157 states have return successors, (12308), 760 states have call predecessors, (12308), 339 states have call successors, (12308) [2023-03-31 22:05:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73497 states to 73497 states and 93277 transitions. [2023-03-31 22:05:09,502 INFO L78 Accepts]: Start accepts. Automaton has 73497 states and 93277 transitions. Word has length 122 [2023-03-31 22:05:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:09,503 INFO L495 AbstractCegarLoop]: Abstraction has 73497 states and 93277 transitions. [2023-03-31 22:05:09,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-03-31 22:05:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73497 states and 93277 transitions. [2023-03-31 22:05:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-03-31 22:05:09,694 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:09,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 22:05:09,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:09,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1738639988, now seen corresponding path program 1 times [2023-03-31 22:05:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:09,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146444260] [2023-03-31 22:05:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat