/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:06:06,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:06:06,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:06:06,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:06:06,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:06:06,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:06:06,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:06:06,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:06:06,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:06:06,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:06:06,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:06:06,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:06:06,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:06:06,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:06:06,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:06:06,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:06:06,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:06:06,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:06:06,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:06:06,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:06:06,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:06:06,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:06:06,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:06:06,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:06:06,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:06:06,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:06:06,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:06:06,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:06:06,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:06:06,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:06:06,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:06:06,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:06:06,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:06:06,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:06:06,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:06:06,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:06:06,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:06:06,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:06:06,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:06:06,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:06:06,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:06:06,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:06:06,298 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:06:06,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:06:06,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:06:06,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:06:06,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:06:06,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:06:06,299 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:06:06,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:06:06,299 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:06:06,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:06:06,300 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:06:06,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:06:06,301 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:06:06,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:06:06,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:06:06,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:06:06,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:06:06,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:06:06,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:06,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:06:06,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:06:06,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:06:06,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:06:06,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:06:06,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:06:06,476 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:06:06,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label30.c [2023-04-01 04:06:07,723 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:06:08,149 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:06:08,149 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label30.c [2023-04-01 04:06:08,173 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664a49164/eb45cf57eb524f8da908f026683c1b35/FLAGa8b01d8c3 [2023-04-01 04:06:08,188 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664a49164/eb45cf57eb524f8da908f026683c1b35 [2023-04-01 04:06:08,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:06:08,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:06:08,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:08,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:06:08,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:06:08,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:08" (1/1) ... [2023-04-01 04:06:08,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536822aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:08, skipping insertion in model container [2023-04-01 04:06:08,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:08" (1/1) ... [2023-04-01 04:06:08,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:06:08,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:06:08,527 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_label30.c[2990,3003] [2023-04-01 04:06:09,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:09,255 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:06:09,274 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_label30.c[2990,3003] [2023-04-01 04:06:09,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:09,645 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:06:09,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09 WrapperNode [2023-04-01 04:06:09,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:09,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:06:09,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:06:09,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:06:09,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:06:09,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:06:09,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:06:09,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:06:09,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (1/1) ... [2023-04-01 04:06:09,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:10,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:06:10,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:06:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:06:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:06:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:06:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:06:10,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:06:10,152 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:06:10,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:06:14,225 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:06:16,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:06:16,645 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:06:16,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:16 BoogieIcfgContainer [2023-04-01 04:06:16,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:06:16,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:06:16,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:06:16,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:06:16,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:06:08" (1/3) ... [2023-04-01 04:06:16,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5c6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:16, skipping insertion in model container [2023-04-01 04:06:16,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:09" (2/3) ... [2023-04-01 04:06:16,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5c6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:16, skipping insertion in model container [2023-04-01 04:06:16,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:16" (3/3) ... [2023-04-01 04:06:16,655 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label30.c [2023-04-01 04:06:16,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:06:16,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:06:16,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:06:16,722 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;@32c7e4bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:06:16,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:06:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:06:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:06:16,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:16,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:16,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:16,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash -134423275, now seen corresponding path program 1 times [2023-04-01 04:06:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070305501] [2023-04-01 04:06:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:17,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:17,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070305501] [2023-04-01 04:06:17,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070305501] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:17,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:17,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:06:17,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505327367] [2023-04-01 04:06:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:17,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:17,116 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:06:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:20,571 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:06:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:06:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:20,590 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:06:20,590 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:06:20,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:20,600 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:20,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:06:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:06:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 04:06:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:06:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 04:06:20,687 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 04:06:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:20,688 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 04:06:20,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:06:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 04:06:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:06:20,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:20,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:20,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:06:20,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:20,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1439938302, now seen corresponding path program 1 times [2023-04-01 04:06:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:20,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61942185] [2023-04-01 04:06:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:20,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:20,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61942185] [2023-04-01 04:06:20,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61942185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:20,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:20,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:06:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081485382] [2023-04-01 04:06:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:06:20,794 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:24,491 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 04:06:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:06:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 04:06:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:24,504 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 04:06:24,504 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 04:06:24,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:24,517 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:24,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:06:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 04:06:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 04:06:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 04:06:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 04:06:24,598 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 04:06:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:24,598 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 04:06:24,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 04:06:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:06:24,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:24,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:06:24,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:24,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2089537574, now seen corresponding path program 1 times [2023-04-01 04:06:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:24,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092066748] [2023-04-01 04:06:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:24,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092066748] [2023-04-01 04:06:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092066748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:24,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:24,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:06:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547291964] [2023-04-01 04:06:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:06:24,750 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:29,151 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 04:06:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:06:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:06:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:29,181 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 04:06:29,181 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 04:06:29,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:29,193 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:29,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 04:06:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 04:06:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 04:06:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 04:06:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 04:06:29,327 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 04:06:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 04:06:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 04:06:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:06:29,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:29,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:06:29,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:29,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 618466803, now seen corresponding path program 1 times [2023-04-01 04:06:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:29,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168885008] [2023-04-01 04:06:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:29,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:06:29,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168885008] [2023-04-01 04:06:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168885008] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410157797] [2023-04-01 04:06:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:29,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:29,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:06:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:29,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:06:29,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:06:29,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:06:29,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410157797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:29,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:06:29,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:06:29,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098737531] [2023-04-01 04:06:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:29,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:29,813 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:06:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:34,045 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 04:06:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:06:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-01 04:06:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:34,088 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 04:06:34,088 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 04:06:34,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:06:34,105 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:34,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 04:06:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 04:06:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 04:06:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 04:06:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 04:06:34,310 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 04:06:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:34,311 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 04:06:34,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:06:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 04:06:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:06:34,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:34,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:34,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:06:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:34,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:34,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1603474456, now seen corresponding path program 1 times [2023-04-01 04:06:34,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:34,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427473046] [2023-04-01 04:06:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:34,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:34,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427473046] [2023-04-01 04:06:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427473046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:34,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:34,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:06:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300330711] [2023-04-01 04:06:34,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:06:34,934 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:38,599 INFO L93 Difference]: Finished difference Result 19470 states and 26419 transitions. [2023-04-01 04:06:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:06:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-01 04:06:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:38,649 INFO L225 Difference]: With dead ends: 19470 [2023-04-01 04:06:38,649 INFO L226 Difference]: Without dead ends: 11208 [2023-04-01 04:06:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:06:38,668 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2075 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4339 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 4339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:38,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2075 Valid, 102 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 4339 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:06:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2023-04-01 04:06:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11031. [2023-04-01 04:06:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 10655 states have (on average 1.2474894415767246) internal successors, (13292), 10757 states have internal predecessors, (13292), 50 states have call successors, (50), 50 states have call predecessors, (50), 325 states have return successors, (1320), 223 states have call predecessors, (1320), 49 states have call successors, (1320) [2023-04-01 04:06:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 14662 transitions. [2023-04-01 04:06:38,930 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 14662 transitions. Word has length 70 [2023-04-01 04:06:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:38,932 INFO L495 AbstractCegarLoop]: Abstraction has 11031 states and 14662 transitions. [2023-04-01 04:06:38,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 14662 transitions. [2023-04-01 04:06:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 04:06:38,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:38,935 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:06:38,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:38,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -398610708, now seen corresponding path program 1 times [2023-04-01 04:06:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643837306] [2023-04-01 04:06:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:06:39,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:39,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643837306] [2023-04-01 04:06:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643837306] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:39,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:06:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878510982] [2023-04-01 04:06:39,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:39,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:39,108 INFO L87 Difference]: Start difference. First operand 11031 states and 14662 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:42,090 INFO L93 Difference]: Finished difference Result 23589 states and 32571 transitions. [2023-04-01 04:06:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2023-04-01 04:06:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:42,128 INFO L225 Difference]: With dead ends: 23589 [2023-04-01 04:06:42,128 INFO L226 Difference]: Without dead ends: 13145 [2023-04-01 04:06:42,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:42,150 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:42,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:06:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2023-04-01 04:06:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 13021. [2023-04-01 04:06:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 12627 states have (on average 1.2280826799714897) internal successors, (15507), 12730 states have internal predecessors, (15507), 59 states have call successors, (59), 59 states have call predecessors, (59), 334 states have return successors, (1510), 231 states have call predecessors, (1510), 58 states have call successors, (1510) [2023-04-01 04:06:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 17076 transitions. [2023-04-01 04:06:42,359 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 17076 transitions. Word has length 75 [2023-04-01 04:06:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:42,361 INFO L495 AbstractCegarLoop]: Abstraction has 13021 states and 17076 transitions. [2023-04-01 04:06:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 17076 transitions. [2023-04-01 04:06:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:06:42,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:42,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:42,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:06:42,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:42,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1420506428, now seen corresponding path program 1 times [2023-04-01 04:06:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899511037] [2023-04-01 04:06:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:06:42,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899511037] [2023-04-01 04:06:42,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899511037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:42,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:42,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:06:42,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092520700] [2023-04-01 04:06:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:42,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:42,614 INFO L87 Difference]: Start difference. First operand 13021 states and 17076 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:45,661 INFO L93 Difference]: Finished difference Result 36208 states and 49830 transitions. [2023-04-01 04:06:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:06:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:45,740 INFO L225 Difference]: With dead ends: 36208 [2023-04-01 04:06:45,741 INFO L226 Difference]: Without dead ends: 23774 [2023-04-01 04:06:45,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:45,772 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 701 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:45,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1245 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:06:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23774 states. [2023-04-01 04:06:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23774 to 21397. [2023-04-01 04:06:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 20819 states have (on average 1.1914597242903118) internal successors, (24805), 20972 states have internal predecessors, (24805), 98 states have call successors, (98), 98 states have call predecessors, (98), 479 states have return successors, (3266), 326 states have call predecessors, (3266), 97 states have call successors, (3266) [2023-04-01 04:06:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 28169 transitions. [2023-04-01 04:06:46,131 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 28169 transitions. Word has length 79 [2023-04-01 04:06:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:46,131 INFO L495 AbstractCegarLoop]: Abstraction has 21397 states and 28169 transitions. [2023-04-01 04:06:46,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 28169 transitions. [2023-04-01 04:06:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:06:46,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:46,132 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:46,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:06:46,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:46,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1206556651, now seen corresponding path program 1 times [2023-04-01 04:06:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320877238] [2023-04-01 04:06:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 04:06:46,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320877238] [2023-04-01 04:06:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320877238] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648868894] [2023-04-01 04:06:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:46,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:46,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:06:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:46,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:06:46,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:06:46,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:06:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 04:06:46,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648868894] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:46,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:06:46,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:06:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614490164] [2023-04-01 04:06:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:46,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:06:46,891 INFO L87 Difference]: Start difference. First operand 21397 states and 28169 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:06:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:50,612 INFO L93 Difference]: Finished difference Result 52635 states and 71770 transitions. [2023-04-01 04:06:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:06:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-04-01 04:06:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:50,701 INFO L225 Difference]: With dead ends: 52635 [2023-04-01 04:06:50,701 INFO L226 Difference]: Without dead ends: 31628 [2023-04-01 04:06:50,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:06:50,730 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2562 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3348 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 3348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:50,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2562 Valid, 78 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 3348 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 04:06:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31628 states. [2023-04-01 04:06:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31628 to 30704. [2023-04-01 04:06:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30704 states, 29767 states have (on average 1.181912856518964) internal successors, (35182), 30047 states have internal predecessors, (35182), 138 states have call successors, (138), 138 states have call predecessors, (138), 798 states have return successors, (5286), 518 states have call predecessors, (5286), 137 states have call successors, (5286) [2023-04-01 04:06:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30704 states to 30704 states and 40606 transitions. [2023-04-01 04:06:51,199 INFO L78 Accepts]: Start accepts. Automaton has 30704 states and 40606 transitions. Word has length 85 [2023-04-01 04:06:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:51,200 INFO L495 AbstractCegarLoop]: Abstraction has 30704 states and 40606 transitions. [2023-04-01 04:06:51,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:06:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30704 states and 40606 transitions. [2023-04-01 04:06:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:06:51,205 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:51,205 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:06:51,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:06:51,416 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,SelfDestructingSolverStorable7 [2023-04-01 04:06:51,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:51,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -607019306, now seen corresponding path program 1 times [2023-04-01 04:06:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251202258] [2023-04-01 04:06:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 04:06:51,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251202258] [2023-04-01 04:06:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251202258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572287058] [2023-04-01 04:06:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:51,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:51,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:06:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:51,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:06:51,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 04:06:51,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:06:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 04:06:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572287058] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:06:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827547988] [2023-04-01 04:06:52,026 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 04:06:52,026 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:06:52,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:06:52,033 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:06:52,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:06:52,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:06:52,236 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-04-01 04:06:52,354 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19794 conjuctions. This might take some time... [2023-04-01 04:06:53,478 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 290 conjuctions.