/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:01:14,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:01:14,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:01:14,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:01:14,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:01:14,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:01:14,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:01:14,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:01:14,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:01:14,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:01:14,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:01:14,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:01:14,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:01:14,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:01:14,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:01:14,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:01:14,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:01:14,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:01:14,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:01:14,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:01:14,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:01:14,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:01:14,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:01:14,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:01:14,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:01:14,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:01:14,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:01:14,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:01:14,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:01:14,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:01:14,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:01:14,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:01:14,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:01:14,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:01:14,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:01:14,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:01:14,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:01:14,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:01:14,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:01:14,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:01:14,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:01:14,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:01:14,386 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:01:14,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:01:14,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:01:14,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:01:14,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:01:14,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:01:14,387 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:01:14,387 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:01:14,387 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:01:14,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:01:14,388 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:01:14,388 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:01:14,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:01:14,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:01:14,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:14,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:01:14,390 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:01:14,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:01:14,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:01:14,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:01:14,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:01:14,595 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:01:14,595 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:01:14,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label55.c [2023-03-31 22:01:15,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:01:15,939 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:01:15,939 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label55.c [2023-03-31 22:01:15,966 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da6a0e23/e89763d9fb6f445caebb22cb3a623f59/FLAG1a1acabdf [2023-03-31 22:01:15,977 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da6a0e23/e89763d9fb6f445caebb22cb3a623f59 [2023-03-31 22:01:15,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:01:15,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:01:15,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:15,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:01:15,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:01:15,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:15" (1/1) ... [2023-03-31 22:01:15,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e71390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:15, skipping insertion in model container [2023-03-31 22:01:15,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:15" (1/1) ... [2023-03-31 22:01:15,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:01:16,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:01:16,254 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/Problem12_label55.c[1435,1448] [2023-03-31 22:01:16,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:16,867 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:01:16,880 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/Problem12_label55.c[1435,1448] [2023-03-31 22:01:17,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:17,159 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:01:17,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17 WrapperNode [2023-03-31 22:01:17,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:17,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:01:17,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:01:17,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:01:17,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:01:17,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:01:17,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:01:17,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:01:17,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (1/1) ... [2023-03-31 22:01:17,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:17,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:01:17,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:01:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:01:17,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:01:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:01:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:01:17,497 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:01:17,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:01:20,467 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:01:20,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:01:20,916 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:01:20,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:20 BoogieIcfgContainer [2023-03-31 22:01:20,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:01:20,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:01:20,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:01:20,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:01:20,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:01:15" (1/3) ... [2023-03-31 22:01:20,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cedfa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:20, skipping insertion in model container [2023-03-31 22:01:20,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:17" (2/3) ... [2023-03-31 22:01:20,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cedfa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:20, skipping insertion in model container [2023-03-31 22:01:20,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:20" (3/3) ... [2023-03-31 22:01:20,927 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label55.c [2023-03-31 22:01:20,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:01:20,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:01:20,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:01:20,999 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;@77dfb9e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:01:20,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:01:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:01:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:01:21,008 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:21,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:21,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:21,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash 636219722, now seen corresponding path program 1 times [2023-03-31 22:01:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211580366] [2023-03-31 22:01:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:21,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:21,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211580366] [2023-03-31 22:01:21,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211580366] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:21,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:21,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:01:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147509687] [2023-03-31 22:01:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:21,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:01:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:01:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:21,253 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:01:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:24,072 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:01:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:01:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:01:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:24,090 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:01:24,090 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:01:24,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:24,098 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:24,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:01:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:01:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 22:01:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:01:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-03-31 22:01:24,167 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-03-31 22:01:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:24,167 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-03-31 22:01:24,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:01:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-03-31 22:01:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:01:24,168 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:24,168 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] [2023-03-31 22:01:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:01:24,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:24,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2093944970, now seen corresponding path program 1 times [2023-03-31 22:01:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013661598] [2023-03-31 22:01:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:24,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013661598] [2023-03-31 22:01:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013661598] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796519164] [2023-03-31 22:01:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:24,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:24,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:24,334 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:27,640 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-03-31 22:01:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-03-31 22:01:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:27,654 INFO L225 Difference]: With dead ends: 4138 [2023-03-31 22:01:27,654 INFO L226 Difference]: Without dead ends: 2775 [2023-03-31 22:01:27,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:27,665 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:27,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 22:01:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-03-31 22:01:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-03-31 22:01:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-03-31 22:01:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-03-31 22:01:27,738 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-03-31 22:01:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:27,738 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-03-31 22:01:27,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-03-31 22:01:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 22:01:27,739 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:27,739 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] [2023-03-31 22:01:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:01:27,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:27,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -780560075, now seen corresponding path program 1 times [2023-03-31 22:01:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:27,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142934551] [2023-03-31 22:01:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:27,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142934551] [2023-03-31 22:01:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142934551] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:27,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:27,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:27,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093331935] [2023-03-31 22:01:27,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:27,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:27,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:27,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:27,865 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:31,073 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-03-31 22:01:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-03-31 22:01:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:31,093 INFO L225 Difference]: With dead ends: 7729 [2023-03-31 22:01:31,093 INFO L226 Difference]: Without dead ends: 4977 [2023-03-31 22:01:31,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:31,099 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:31,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:01:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-03-31 22:01:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-03-31 22:01:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-03-31 22:01:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-03-31 22:01:31,205 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-03-31 22:01:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:31,206 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-03-31 22:01:31,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:01:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-03-31 22:01:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:01:31,207 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:31,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:31,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:01:31,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:31,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1821158146, now seen corresponding path program 1 times [2023-03-31 22:01:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461513288] [2023-03-31 22:01:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:31,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:31,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461513288] [2023-03-31 22:01:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461513288] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722295864] [2023-03-31 22:01:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:31,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:01:31,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:01:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:31,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:01:31,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:31,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722295864] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:01:31,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982145425] [2023-03-31 22:01:31,606 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 22:01:31,606 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:01:31,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:01:31,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:01:31,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:01:31,754 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 22:01:31,948 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-03-31 22:01:32,523 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:01:32,923 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-03-31 22:01:35,968 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 48212 conjuctions. This might take some time... [2023-03-31 22:01:39,112 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjuctions.