/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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:58:49,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:58:49,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:58:49,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:58:49,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:58:49,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:58:49,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:58:49,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:58:49,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:58:49,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:58:49,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:58:49,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:58:49,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:58:49,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:58:49,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:58:49,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:58:49,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:58:49,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:58:49,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:58:49,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:58:49,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:58:49,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:58:49,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:58:49,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:58:49,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:58:49,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:58:49,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:58:49,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:58:49,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:58:49,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:58:49,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:58:49,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:58:49,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:58:49,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:58:49,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:58:49,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:58:49,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:58:49,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:58:49,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:58:49,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:58:49,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:58:49,238 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 21:58:49,260 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:58:49,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:58:49,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:58:49,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:58:49,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:58:49,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:58:49,262 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:58:49,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:58:49,262 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:58:49,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:58:49,263 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:58:49,263 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:58:49,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:58:49,264 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:58:49,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:58:49,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:58:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:58:49,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:58:49,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:58:49,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:58:49,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:58:49,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:58:49,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:58:49,487 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:58:49,488 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:58:49,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label21.c [2023-03-31 21:58:50,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:58:50,805 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:58:50,805 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label21.c [2023-03-31 21:58:50,822 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6875fc18d/9c4c1bdf48ce4b9cb6b9b004a989a547/FLAG113c0e508 [2023-03-31 21:58:50,831 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6875fc18d/9c4c1bdf48ce4b9cb6b9b004a989a547 [2023-03-31 21:58:50,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:58:50,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:58:50,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:58:50,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:58:50,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:58:50,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:58:50" (1/1) ... [2023-03-31 21:58:50,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e396e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:50, skipping insertion in model container [2023-03-31 21:58:50,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:58:50" (1/1) ... [2023-03-31 21:58:50,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:58:50,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:58:51,074 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_label21.c[3054,3067] [2023-03-31 21:58:51,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:58:51,644 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:58:51,665 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_label21.c[3054,3067] [2023-03-31 21:58:51,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:58:51,951 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:58:51,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51 WrapperNode [2023-03-31 21:58:51,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:58:51,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:58:51,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:58:51,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:58:51,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:51,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,095 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:58:52,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:58:52,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:58:52,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:58:52,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (1/1) ... [2023-03-31 21:58:52,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:58:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:58:52,150 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 21:58:52,169 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 21:58:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:58:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:58:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:58:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:58:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:58:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:58:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:58:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:58:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:58:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:58:52,254 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:58:52,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:58:55,170 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:58:55,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:58:55,753 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:58:55,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:58:55 BoogieIcfgContainer [2023-03-31 21:58:55,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:58:55,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:58:55,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:58:55,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:58:55,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:58:50" (1/3) ... [2023-03-31 21:58:55,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e288b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:58:55, skipping insertion in model container [2023-03-31 21:58:55,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:51" (2/3) ... [2023-03-31 21:58:55,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e288b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:58:55, skipping insertion in model container [2023-03-31 21:58:55,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:58:55" (3/3) ... [2023-03-31 21:58:55,765 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label21.c [2023-03-31 21:58:55,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:58:55,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:58:55,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:58:55,837 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;@1500ba23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:58:55,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:58:55,844 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 21:58:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 21:58:55,849 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:55,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:58:55,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:55,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 832851170, now seen corresponding path program 1 times [2023-03-31 21:58:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:55,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353717635] [2023-03-31 21:58:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:56,203 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 21:58:56,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353717635] [2023-03-31 21:58:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353717635] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:56,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:56,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:58:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123377290] [2023-03-31 21:58:56,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:58:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:58:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:58:56,269 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 21:58:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:58:59,168 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 21:58:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:58:59,171 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 21:58:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:58:59,187 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 21:58:59,187 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 21:58:59,194 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 21:58:59,196 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:58:59,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 21:58:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 21:58:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 21:58:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 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 21:58:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-03-31 21:58:59,285 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-03-31 21:58:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:58:59,286 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-03-31 21:58:59,286 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 21:58:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-03-31 21:58:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 21:58:59,287 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:58:59,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:58:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:58:59,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:58:59,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:58:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash 526007145, now seen corresponding path program 1 times [2023-03-31 21:58:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:58:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108840448] [2023-03-31 21:58:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:58:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:58:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:58:59,517 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 21:58:59,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:58:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108840448] [2023-03-31 21:58:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108840448] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:58:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:58:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:58:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381716410] [2023-03-31 21:58:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:58:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:58:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:58:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:58:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:58:59,522 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:02,719 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-03-31 21:59:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:59:02,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-03-31 21:59:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:02,730 INFO L225 Difference]: With dead ends: 4148 [2023-03-31 21:59:02,730 INFO L226 Difference]: Without dead ends: 2785 [2023-03-31 21:59:02,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:59:02,745 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:02,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 21:59:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-03-31 21:59:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-03-31 21:59:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-03-31 21:59:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-03-31 21:59:02,823 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-03-31 21:59:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:02,823 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-03-31 21:59:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-03-31 21:59:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 21:59:02,825 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:02,825 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] [2023-03-31 21:59:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:59:02,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:02,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash 223791720, now seen corresponding path program 1 times [2023-03-31 21:59:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546252176] [2023-03-31 21:59:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:02,995 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 21:59:02,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:02,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546252176] [2023-03-31 21:59:02,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546252176] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:02,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:02,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:59:02,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368994120] [2023-03-31 21:59:02,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:02,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:02,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:02,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:59:02,997 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 21:59:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:06,259 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-03-31 21:59:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:59:06,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-03-31 21:59:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:06,283 INFO L225 Difference]: With dead ends: 8417 [2023-03-31 21:59:06,283 INFO L226 Difference]: Without dead ends: 5666 [2023-03-31 21:59:06,289 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 21:59:06,290 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:06,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 21:59:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-03-31 21:59:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-03-31 21:59:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-03-31 21:59:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-03-31 21:59:06,405 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-03-31 21:59:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-03-31 21:59:06,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 21:59:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-03-31 21:59:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-31 21:59:06,443 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:06,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:59:06,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:06,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1683109733, now seen corresponding path program 1 times [2023-03-31 21:59:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398582670] [2023-03-31 21:59:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:59:06,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398582670] [2023-03-31 21:59:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398582670] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815394398] [2023-03-31 21:59:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:06,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:06,678 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 21:59:06,687 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 21:59:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:06,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:59:06,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:59:06,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:59:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815394398] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:06,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:59:06,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:59:06,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550716575] [2023-03-31 21:59:06,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:06,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:59:06,889 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-03-31 21:59:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:10,648 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-03-31 21:59:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:59:10,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 74 [2023-03-31 21:59:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:10,684 INFO L225 Difference]: With dead ends: 17003 [2023-03-31 21:59:10,685 INFO L226 Difference]: Without dead ends: 11404 [2023-03-31 21:59:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 21:59:10,698 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2205 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:10,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 93 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 21:59:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-03-31 21:59:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-03-31 21:59:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-03-31 21:59:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-03-31 21:59:10,901 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-03-31 21:59:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:10,902 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-03-31 21:59:10,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-03-31 21:59:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-03-31 21:59:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 21:59:10,906 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:10,906 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:10,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:59:11,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:11,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:11,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2011716332, now seen corresponding path program 1 times [2023-03-31 21:59:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667751375] [2023-03-31 21:59:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:59:11,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:11,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667751375] [2023-03-31 21:59:11,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667751375] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:11,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505422125] [2023-03-31 21:59:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:11,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:11,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:59:11,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:59:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:11,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:59:11,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:59:11,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:59:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:59:11,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505422125] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:59:11,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720726063] [2023-03-31 21:59:11,713 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 21:59:11,713 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:59:11,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:59:11,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:59:11,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:59:11,869 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 21:59:11,956 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-03-31 21:59:12,144 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2023-03-31 21:59:12,714 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 21:59:12,780 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-03-31 21:59:13,515 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2023-03-31 21:59:16,369 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 80892 conjuctions. This might take some time... [2023-03-31 21:59:25,924 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1120 conjuctions.