/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/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:26:44,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:26:44,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:26:44,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:26:44,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:26:44,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:26:44,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:26:44,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:26:44,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:26:44,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:26:44,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:26:44,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:26:44,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:26:44,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:26:44,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:26:44,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:26:44,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:26:44,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:26:44,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:26:44,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:26:44,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:26:44,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:26:44,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:26:44,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:26:44,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:26:44,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:26:44,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:26:44,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:26:44,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:26:44,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:26:44,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:26:44,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:26:44,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:26:44,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:26:44,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:26:44,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:26:44,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:26:44,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:26:44,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:26:44,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:26:44,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:26:44,237 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 04:26:44,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:26:44,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:26:44,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:26:44,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:26:44,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:26:44,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:26:44,267 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:26:44,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:26:44,267 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:26:44,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:26:44,268 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:26:44,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:26:44,269 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:26:44,269 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:26:44,269 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:26:44,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:26:44,269 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:26:44,269 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:26:44,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:26:44,270 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:26:44,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:26:44,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:26:44,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:26:44,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:26:44,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:26:44,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:26:44,272 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:26:44,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:26:44,272 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:26:44,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:26:44,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:26:44,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:26:44,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:26:44,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:26:44,273 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:26:44,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:26:44,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:26:44,273 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:26:44,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:26:44,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:26:44,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:26:44,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:26:44,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:26:44,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:26:44,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:26:44,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:26:44,535 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:26:44,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label23.c [2023-04-01 04:26:45,692 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:26:46,096 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:26:46,097 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label23.c [2023-04-01 04:26:46,120 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20ce8b55/4c7040aa0bac4994a9b99069ba6bf1ac/FLAGa9dd087da [2023-04-01 04:26:46,136 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20ce8b55/4c7040aa0bac4994a9b99069ba6bf1ac [2023-04-01 04:26:46,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:26:46,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:26:46,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:26:46,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:26:46,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:26:46,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:26:46" (1/1) ... [2023-04-01 04:26:46,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101ee9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:46, skipping insertion in model container [2023-04-01 04:26:46,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:26:46" (1/1) ... [2023-04-01 04:26:46,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:26:46,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:26:46,482 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/Problem18_label23.c[5791,5804] [2023-04-01 04:26:47,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:26:47,207 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:26:47,232 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/Problem18_label23.c[5791,5804] [2023-04-01 04:26:47,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:26:47,485 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:26:47,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47 WrapperNode [2023-04-01 04:26:47,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:26:47,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:26:47,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:26:47,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:26:47,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:26:47,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:26:47,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:26:47,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:26:47,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (1/1) ... [2023-04-01 04:26:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:26:47,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:26:47,814 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 04:26:47,841 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 04:26:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:26:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:26:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:26:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:26:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:26:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:26:47,922 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:26:47,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:26:50,882 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:26:58,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:26:58,277 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:26:58,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:58 BoogieIcfgContainer [2023-04-01 04:26:58,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:26:58,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:26:58,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:26:58,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:26:58,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:26:46" (1/3) ... [2023-04-01 04:26:58,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698c1d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:58, skipping insertion in model container [2023-04-01 04:26:58,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:26:47" (2/3) ... [2023-04-01 04:26:58,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698c1d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:58, skipping insertion in model container [2023-04-01 04:26:58,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:58" (3/3) ... [2023-04-01 04:26:58,289 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2023-04-01 04:26:58,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:26:58,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:26:58,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:26:58,378 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;@68dd2cb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:26:58,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:26:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:26:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:26:58,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:58,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:58,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:58,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 314235651, now seen corresponding path program 1 times [2023-04-01 04:26:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3118930] [2023-04-01 04:26:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:58,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:58,769 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 04:26:58,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3118930] [2023-04-01 04:26:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3118930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:58,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:26:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39761369] [2023-04-01 04:26:58,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:26:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:26:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:58,806 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:27:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:00,997 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:27:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:27:01,000 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 04:27:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:01,020 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:27:01,020 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:27:01,028 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 04:27:01,031 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:01,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:27:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:27:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:27:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:27:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 04:27:01,137 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 04:27:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:01,138 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 04:27:01,145 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 04:27:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 04:27:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:27:01,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:01,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:01,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:27:01,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:01,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash 380864574, now seen corresponding path program 1 times [2023-04-01 04:27:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:01,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290770525] [2023-04-01 04:27:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:01,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:01,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290770525] [2023-04-01 04:27:01,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290770525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:01,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:01,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613755984] [2023-04-01 04:27:01,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:01,406 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 04:27:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:04,495 INFO L93 Difference]: Finished difference Result 2797 states and 4545 transitions. [2023-04-01 04:27:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:27:04,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 04:27:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:04,507 INFO L225 Difference]: With dead ends: 2797 [2023-04-01 04:27:04,507 INFO L226 Difference]: Without dead ends: 1883 [2023-04-01 04:27:04,510 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 04:27:04,512 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1522 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:04,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 96 Invalid, 3699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:27:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-01 04:27:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1843. [2023-04-01 04:27:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4151464897733554) internal successors, (2560), 1816 states have internal predecessors, (2560), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 04:27:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2625 transitions. [2023-04-01 04:27:04,575 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2625 transitions. Word has length 22 [2023-04-01 04:27:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:04,576 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2625 transitions. [2023-04-01 04:27:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 04:27:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2625 transitions. [2023-04-01 04:27:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:27:04,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:04,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:04,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:27:04,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:04,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash -986427976, now seen corresponding path program 1 times [2023-04-01 04:27:04,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368947725] [2023-04-01 04:27:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:27:04,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368947725] [2023-04-01 04:27:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368947725] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:04,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193982635] [2023-04-01 04:27:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:04,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:04,783 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 04:27:04,785 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 04:27:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:04,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:27:04,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:27:05,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:27:05,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193982635] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:05,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:27:05,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:27:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35428875] [2023-04-01 04:27:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:05,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:27:05,038 INFO L87 Difference]: Start difference. First operand 1843 states and 2625 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:27:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:07,919 INFO L93 Difference]: Finished difference Result 5615 states and 8143 transitions. [2023-04-01 04:27:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:27:07,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 32 [2023-04-01 04:27:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:07,941 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 04:27:07,941 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 04:27:07,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:27:07,949 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1574 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:07,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 59 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:27:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 04:27:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 04:27:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2555275678701372) internal successors, (4486), 3601 states have internal predecessors, (4486), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 04:27:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4700 transitions. [2023-04-01 04:27:08,083 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4700 transitions. Word has length 32 [2023-04-01 04:27:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:08,083 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4700 transitions. [2023-04-01 04:27:08,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:27:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4700 transitions. [2023-04-01 04:27:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 04:27:08,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:08,086 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] [2023-04-01 04:27:08,095 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 04:27:08,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:08,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:08,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1165434543, now seen corresponding path program 1 times [2023-04-01 04:27:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993031241] [2023-04-01 04:27:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:08,593 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 04:27:08,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993031241] [2023-04-01 04:27:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993031241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:08,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:08,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:27:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282321157] [2023-04-01 04:27:08,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:08,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:27:08,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:27:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:27:08,599 INFO L87 Difference]: Start difference. First operand 3658 states and 4700 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:27:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:11,226 INFO L93 Difference]: Finished difference Result 9180 states and 12226 transitions. [2023-04-01 04:27:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:27:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-04-01 04:27:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:11,252 INFO L225 Difference]: With dead ends: 9180 [2023-04-01 04:27:11,252 INFO L226 Difference]: Without dead ends: 5463 [2023-04-01 04:27:11,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:11,264 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 497 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:11,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 692 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 2681 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:27:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2023-04-01 04:27:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4897. [2023-04-01 04:27:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4795 states have (on average 1.1453597497393118) internal successors, (5492), 4826 states have internal predecessors, (5492), 27 states have call successors, (27), 27 states have call predecessors, (27), 74 states have return successors, (314), 43 states have call predecessors, (314), 26 states have call successors, (314) [2023-04-01 04:27:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 5833 transitions. [2023-04-01 04:27:11,381 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 5833 transitions. Word has length 49 [2023-04-01 04:27:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:11,382 INFO L495 AbstractCegarLoop]: Abstraction has 4897 states and 5833 transitions. [2023-04-01 04:27:11,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:27:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 5833 transitions. [2023-04-01 04:27:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 04:27:11,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:11,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:27:11,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:11,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1246973034, now seen corresponding path program 1 times [2023-04-01 04:27:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:11,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727921797] [2023-04-01 04:27:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:11,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:11,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727921797] [2023-04-01 04:27:11,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727921797] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:11,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902871223] [2023-04-01 04:27:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:11,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:11,674 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 04:27:11,701 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 04:27:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:11,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:27:11,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:11,856 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 04:27:11,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:27:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902871223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:11,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:27:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 04:27:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118066480] [2023-04-01 04:27:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:11,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:27:11,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:27:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:27:11,863 INFO L87 Difference]: Start difference. First operand 4897 states and 5833 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:27:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:13,220 INFO L93 Difference]: Finished difference Result 10334 states and 12551 transitions. [2023-04-01 04:27:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:27:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2023-04-01 04:27:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:13,244 INFO L225 Difference]: With dead ends: 10334 [2023-04-01 04:27:13,245 INFO L226 Difference]: Without dead ends: 5442 [2023-04-01 04:27:13,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:27:13,259 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 526 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:13,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 533 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:27:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2023-04-01 04:27:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5349. [2023-04-01 04:27:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5243 states have (on average 1.1550638947167653) internal successors, (6056), 5274 states have internal predecessors, (6056), 29 states have call successors, (29), 29 states have call predecessors, (29), 76 states have return successors, (364), 45 states have call predecessors, (364), 28 states have call successors, (364) [2023-04-01 04:27:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 6449 transitions. [2023-04-01 04:27:13,391 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 6449 transitions. Word has length 74 [2023-04-01 04:27:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:13,392 INFO L495 AbstractCegarLoop]: Abstraction has 5349 states and 6449 transitions. [2023-04-01 04:27:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:27:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 6449 transitions. [2023-04-01 04:27:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 04:27:13,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:13,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:13,411 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 04:27:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:13,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:13,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -73584520, now seen corresponding path program 1 times [2023-04-01 04:27:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:13,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964330797] [2023-04-01 04:27:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:14,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964330797] [2023-04-01 04:27:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964330797] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965609612] [2023-04-01 04:27:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:14,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:14,212 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 04:27:14,214 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 04:27:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:14,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:27:14,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:14,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:27:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965609612] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:27:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121660327] [2023-04-01 04:27:14,767 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-04-01 04:27:14,767 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:27:14,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:27:14,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:27:14,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:27:14,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:27:15,107 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49