/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:03:19,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:03:19,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:03:19,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:03:19,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:03:19,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:03:19,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:03:19,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:03:19,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:03:19,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:03:19,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:03:19,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:03:19,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:03:19,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:03:19,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:03:19,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:03:19,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:03:19,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:03:19,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:03:19,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:03:19,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:03:19,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:03:19,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:03:19,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:03:19,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:03:19,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:03:19,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:03:19,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:03:19,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:03:19,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:03:19,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:03:19,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:03:19,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:03:19,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:03:19,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:03:19,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:03:19,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:03:19,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:03:19,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:03:19,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:03:19,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:03:19,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 02:03:19,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:03:19,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:03:19,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:03:19,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:03:19,354 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:03:19,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:03:19,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:03:19,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:03:19,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:03:19,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:03:19,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:03:19,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:03:19,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:03:19,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:03:19,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:03:19,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:03:19,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:03:19,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:03:19,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:03:19,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:03:19,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:03:19,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:03:19,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:03:19,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:03:19,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:03:19,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:03:19,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:03:19,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:03:19,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:03:19,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:03:19,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:03:19,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:03:19,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:03:19,841 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:03:19,841 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:03:19,842 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-09-25 02:03:19,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8164e9f7b/6264d00ded36437d84e8c4f00ecb887f/FLAG30566828f [2020-09-25 02:03:20,445 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:03:20,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-09-25 02:03:20,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8164e9f7b/6264d00ded36437d84e8c4f00ecb887f/FLAG30566828f [2020-09-25 02:03:20,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8164e9f7b/6264d00ded36437d84e8c4f00ecb887f [2020-09-25 02:03:20,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:03:20,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:03:20,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:03:20,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:03:20,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:03:20,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:03:20" (1/1) ... [2020-09-25 02:03:20,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df9f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:20, skipping insertion in model container [2020-09-25 02:03:20,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:03:20" (1/1) ... [2020-09-25 02:03:20,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:03:20,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:03:21,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:03:21,096 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:03:21,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:03:21,140 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:03:21,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21 WrapperNode [2020-09-25 02:03:21,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:03:21,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:03:21,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:03:21,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:03:21,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... [2020-09-25 02:03:21,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:03:21,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:03:21,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:03:21,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:03:21,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:03:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:03:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:03:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 02:03:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 02:03:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:03:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:03:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:03:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 02:03:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 02:03:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:03:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:03:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:03:21,547 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:03:21,549 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:03:21,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:03:21 BoogieIcfgContainer [2020-09-25 02:03:21,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:03:21,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:03:21,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:03:21,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:03:21,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:03:20" (1/3) ... [2020-09-25 02:03:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d1af38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:03:21, skipping insertion in model container [2020-09-25 02:03:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:21" (2/3) ... [2020-09-25 02:03:21,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d1af38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:03:21, skipping insertion in model container [2020-09-25 02:03:21,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:03:21" (3/3) ... [2020-09-25 02:03:21,600 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-09-25 02:03:21,620 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:03:21,635 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:03:21,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:03:21,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:03:21,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:03:21,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:03:21,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:03:21,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:03:21,687 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:03:21,687 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:03:21,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:03:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-25 02:03:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 02:03:21,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:21,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:03:21,718 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -588914908, now seen corresponding path program 1 times [2020-09-25 02:03:21,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:21,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122220490] [2020-09-25 02:03:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:21,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:22,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:03:22,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-09-25 02:03:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:03:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:03:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:22,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:22,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:22,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:22,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:03:22,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:22,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:22,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 02:03:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:22,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:22,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:22,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 02:03:22,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:22,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:03:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 02:03:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:03:22,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122220490] [2020-09-25 02:03:22,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:03:22,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:03:22,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445424196] [2020-09-25 02:03:22,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:03:22,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:03:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:03:22,277 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-09-25 02:03:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:22,381 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-25 02:03:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:03:22,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 02:03:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:22,397 INFO L225 Difference]: With dead ends: 46 [2020-09-25 02:03:22,398 INFO L226 Difference]: Without dead ends: 32 [2020-09-25 02:03:22,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:03:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-25 02:03:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-25 02:03:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 02:03:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 02:03:22,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-09-25 02:03:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:22,458 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 02:03:22,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:03:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 02:03:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 02:03:22,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:22,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:03:22,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:03:22,462 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1852809946, now seen corresponding path program 1 times [2020-09-25 02:03:22,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:22,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778039243] [2020-09-25 02:03:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:22,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 02:03:22,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-09-25 02:03:22,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:03:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:03:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 02:03:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:22,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:22,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:22,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:22,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:22,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:22,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:22,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 02:03:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:22,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:03:23,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:23,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 02:03:23,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:03:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:03:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:03:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:23,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 02:03:23,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:03:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:03:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:03:23,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778039243] [2020-09-25 02:03:23,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:03:23,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 02:03:23,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623868613] [2020-09-25 02:03:23,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:03:23,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:03:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:03:23,137 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-09-25 02:03:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:23,247 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-09-25 02:03:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:03:23,248 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 02:03:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:23,249 INFO L225 Difference]: With dead ends: 45 [2020-09-25 02:03:23,249 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 02:03:23,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:03:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 02:03:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-25 02:03:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 02:03:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-09-25 02:03:23,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2020-09-25 02:03:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:23,261 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-09-25 02:03:23,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:03:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-09-25 02:03:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 02:03:23,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:23,263 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 02:03:23,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:03:23,263 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash -238705980, now seen corresponding path program 1 times [2020-09-25 02:03:23,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:23,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319459423] [2020-09-25 02:03:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 02:03:23,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:23,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-09-25 02:03:23,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:03:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:03:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:03:23,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:23,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:23,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:23,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:23,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:23,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:23,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:23,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:23,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 02:03:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:03:23,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:23,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 02:03:23,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:03:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:03:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 02:03:23,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:23,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:23,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:23,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:03:23,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:23,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 02:03:23,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:03:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:03:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:24,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:24,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:24,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:24,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:03:24,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:03:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:03:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:03:24,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319459423] [2020-09-25 02:03:24,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:03:24,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:03:24,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76381954] [2020-09-25 02:03:24,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:03:24,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:03:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:03:24,044 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2020-09-25 02:03:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:24,145 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-09-25 02:03:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:03:24,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 02:03:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:24,147 INFO L225 Difference]: With dead ends: 55 [2020-09-25 02:03:24,147 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 02:03:24,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:03:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 02:03:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-09-25 02:03:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:03:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 02:03:24,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-25 02:03:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:24,158 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 02:03:24,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:03:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 02:03:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 02:03:24,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:24,160 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 02:03:24,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:03:24,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2006293766, now seen corresponding path program 1 times [2020-09-25 02:03:24,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:24,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664839724] [2020-09-25 02:03:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:24,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 02:03:25,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-09-25 02:03:25,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:03:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:03:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 02:03:25,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:25,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:25,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:25,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:25,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 02:03:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 02:03:25,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:25,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 02:03:25,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:03:25,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:03:25,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 02:03:25,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:25,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:03:25,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:25,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-25 02:03:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:03:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 02:03:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:25,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:03:25,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:25,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 02:03:25,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:03:25,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:25,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:03:25,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:25,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:25,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:25,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:03:25,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:03:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:03:25,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 02:03:25,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664839724] [2020-09-25 02:03:25,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:03:25,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:03:25,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290177588] [2020-09-25 02:03:25,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:03:25,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:03:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:03:25,526 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 10 states. [2020-09-25 02:03:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:25,683 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-09-25 02:03:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:03:25,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 02:03:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:25,685 INFO L225 Difference]: With dead ends: 65 [2020-09-25 02:03:25,685 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 02:03:25,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:03:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 02:03:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-09-25 02:03:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 02:03:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-25 02:03:25,695 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2020-09-25 02:03:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:25,696 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-25 02:03:25,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:03:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-25 02:03:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 02:03:25,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:25,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-25 02:03:25,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:03:25,699 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash 940355172, now seen corresponding path program 2 times [2020-09-25 02:03:25,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:25,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843539791] [2020-09-25 02:03:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 02:03:27,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:27,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-09-25 02:03:27,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:03:27,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:03:27,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:03:27,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:27,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:27,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 02:03:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 02:03:27,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 02:03:27,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:03:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:03:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 02:03:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:27,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 02:03:27,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 02:03:27,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:03:27,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:27,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 02:03:27,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:03:27,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 02:03:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:03:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 02:03:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:27,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:03:27,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 02:03:27,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:03:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:03:27,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:27,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:27,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:27,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:27,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:27,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:03:27,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:03:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:27,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:03:27,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 02:03:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843539791] [2020-09-25 02:03:27,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:03:27,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:03:27,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101349446] [2020-09-25 02:03:27,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:03:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:03:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:03:27,842 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 11 states. [2020-09-25 02:03:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:27,988 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-09-25 02:03:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:03:27,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-25 02:03:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:27,991 INFO L225 Difference]: With dead ends: 75 [2020-09-25 02:03:27,991 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 02:03:27,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:03:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 02:03:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-09-25 02:03:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 02:03:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 02:03:28,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-09-25 02:03:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:28,003 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 02:03:28,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:03:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 02:03:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 02:03:28,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:28,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:03:28,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:03:28,006 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash 826985242, now seen corresponding path program 2 times [2020-09-25 02:03:28,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:28,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584328823] [2020-09-25 02:03:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:03:28,022 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:03:28,022 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:03:28,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:03:28,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:03:28 BoogieIcfgContainer [2020-09-25 02:03:28,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:03:28,056 INFO L168 Benchmark]: Toolchain (without parser) took 7238.12 ms. Allocated memory was 140.5 MB in the beginning and 276.3 MB in the end (delta: 135.8 MB). Free memory was 104.4 MB in the beginning and 143.7 MB in the end (delta: -39.3 MB). Peak memory consumption was 96.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:28,057 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:03:28,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.35 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:28,059 INFO L168 Benchmark]: Boogie Preprocessor took 107.06 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 94.4 MB in the beginning and 180.5 MB in the end (delta: -86.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:28,060 INFO L168 Benchmark]: RCFGBuilder took 312.86 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:28,061 INFO L168 Benchmark]: TraceAbstraction took 6475.27 ms. Allocated memory was 201.3 MB in the beginning and 276.3 MB in the end (delta: 75.0 MB). Free memory was 167.1 MB in the beginning and 143.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 98.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:28,064 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.35 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.06 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 94.4 MB in the beginning and 180.5 MB in the end (delta: -86.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.86 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6475.27 ms. Allocated memory was 201.3 MB in the beginning and 276.3 MB in the end (delta: 75.0 MB). Free memory was 167.1 MB in the beginning and 143.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 98.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; [L19] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND FALSE !(x==0) [L14] CALL, EXPR id(x-1) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND FALSE !(x==0) [L14] CALL, EXPR id(x-1) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND TRUE x==0 [L13] return 0; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) [L19] int result = id(input); [L20] COND TRUE result == 5 [L21] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 166 SDslu, 507 SDs, 0 SdLazy, 201 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 13192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 15/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...