/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=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-adbd35c [2020-10-12 18:24:11,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 18:24:11,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 18:24:11,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 18:24:11,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 18:24:11,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 18:24:11,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 18:24:11,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 18:24:11,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 18:24:11,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 18:24:11,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 18:24:11,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 18:24:11,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 18:24:11,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 18:24:11,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 18:24:11,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 18:24:11,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 18:24:11,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 18:24:11,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 18:24:11,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 18:24:11,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 18:24:11,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 18:24:11,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 18:24:11,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 18:24:11,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 18:24:11,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 18:24:11,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 18:24:11,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 18:24:11,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 18:24:11,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 18:24:11,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 18:24:11,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 18:24:11,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 18:24:11,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 18:24:11,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 18:24:11,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 18:24:11,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 18:24:11,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 18:24:11,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 18:24:11,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 18:24:11,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 18:24:11,350 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 [2020-10-12 18:24:11,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 18:24:11,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 18:24:11,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 18:24:11,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 18:24:11,393 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 18:24:11,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 18:24:11,394 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 18:24:11,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 18:24:11,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 18:24:11,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 18:24:11,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 18:24:11,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 18:24:11,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 18:24:11,396 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 18:24:11,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 18:24:11,396 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 18:24:11,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 18:24:11,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 18:24:11,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 18:24:11,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 18:24:11,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 18:24:11,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:24:11,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 18:24:11,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 18:24:11,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 18:24:11,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 18:24:11,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 18:24:11,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 18:24:11,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 18:24:11,399 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 18:24:11,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 18:24:11,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 18:24:11,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 18:24:11,756 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 18:24:11,756 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 18:24:11,757 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-12 18:24:11,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a06d4194c/9853ee2e937d4878ad017b51363dea73/FLAGcada9ab9f [2020-10-12 18:24:12,197 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 18:24:12,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-12 18:24:12,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a06d4194c/9853ee2e937d4878ad017b51363dea73/FLAGcada9ab9f [2020-10-12 18:24:12,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a06d4194c/9853ee2e937d4878ad017b51363dea73 [2020-10-12 18:24:12,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 18:24:12,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 18:24:12,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 18:24:12,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 18:24:12,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 18:24:12,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc1a58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12, skipping insertion in model container [2020-10-12 18:24:12,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 18:24:12,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 18:24:12,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:24:12,814 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 18:24:12,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:24:12,841 INFO L208 MainTranslator]: Completed translation [2020-10-12 18:24:12,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12 WrapperNode [2020-10-12 18:24:12,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 18:24:12,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 18:24:12,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 18:24:12,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 18:24:12,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (1/1) ... [2020-10-12 18:24:12,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 18:24:12,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 18:24:12,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 18:24:12,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 18:24:12,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (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 [2020-10-12 18:24:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 18:24:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 18:24:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-12 18:24:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-12 18:24:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 18:24:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 18:24:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 18:24:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-12 18:24:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-12 18:24:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 18:24:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 18:24:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 18:24:13,166 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 18:24:13,166 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 18:24:13,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:24:13 BoogieIcfgContainer [2020-10-12 18:24:13,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 18:24:13,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 18:24:13,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 18:24:13,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 18:24:13,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:24:12" (1/3) ... [2020-10-12 18:24:13,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a134c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:24:13, skipping insertion in model container [2020-10-12 18:24:13,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:24:12" (2/3) ... [2020-10-12 18:24:13,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a134c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:24:13, skipping insertion in model container [2020-10-12 18:24:13,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:24:13" (3/3) ... [2020-10-12 18:24:13,178 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-10-12 18:24:13,188 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 18:24:13,195 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 18:24:13,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 18:24:13,231 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 18:24:13,232 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 18:24:13,232 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 18:24:13,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 18:24:13,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 18:24:13,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 18:24:13,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 18:24:13,233 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 18:24:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-12 18:24:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 18:24:13,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:13,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:24:13,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-10-12 18:24:13,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:13,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070588041] [2020-10-12 18:24:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:13,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:13,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 18:24:13,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:24:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 18:24:13,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:24:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 18:24:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 18:24:13,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 18:24:13,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:24:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:13,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:13,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:24:13,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:24:13,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:24:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:24:13,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:13,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:24:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:13,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:13,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:24:13,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 18:24:13,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:24:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 18:24:13,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:24:13,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070588041] [2020-10-12 18:24:13,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:24:13,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 18:24:13,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901812716] [2020-10-12 18:24:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 18:24:13,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:24:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 18:24:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:24:13,628 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-12 18:24:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:24:13,674 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-12 18:24:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 18:24:13,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 18:24:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:24:13,686 INFO L225 Difference]: With dead ends: 38 [2020-10-12 18:24:13,686 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 18:24:13,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:24:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 18:24:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 18:24:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 18:24:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 18:24:13,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-10-12 18:24:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:24:13,735 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 18:24:13,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 18:24:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 18:24:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 18:24:13,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:13,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:24:13,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 18:24:13,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-10-12 18:24:13,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:13,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914059877] [2020-10-12 18:24:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:13,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 18:24:14,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:24:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-12 18:24:14,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:24:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 18:24:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 18:24:14,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:14,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:24:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:24:14,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:24:14,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:24:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:24:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:14,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:24:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 18:24:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 18:24:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:24:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:24:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:24:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:14,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:24:14,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 18:24:14,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:24:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:24:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:24:14,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914059877] [2020-10-12 18:24:14,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:24:14,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 18:24:14,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066866524] [2020-10-12 18:24:14,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 18:24:14,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:24:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 18:24:14,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:24:14,240 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-12 18:24:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:24:14,356 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-12 18:24:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 18:24:14,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-12 18:24:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:24:14,358 INFO L225 Difference]: With dead ends: 33 [2020-10-12 18:24:14,358 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 18:24:14,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 18:24:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 18:24:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-12 18:24:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 18:24:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 18:24:14,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-12 18:24:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:24:14,368 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 18:24:14,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 18:24:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 18:24:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 18:24:14,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:14,370 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] [2020-10-12 18:24:14,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 18:24:14,370 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-10-12 18:24:14,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:14,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131542983] [2020-10-12 18:24:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 18:24:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:24:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-12 18:24:14,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:24:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 18:24:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 18:24:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:24:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:24:14,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:24:14,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:24:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:24:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:14,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:24:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 18:24:14,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 18:24:14,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:24:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 18:24:14,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:14,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 18:24:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 18:24:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:24:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:24:14,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:14,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:14,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:14,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:14,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:24:14,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 18:24:14,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:24:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 18:24:14,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 18:24:14,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131542983] [2020-10-12 18:24:14,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:24:14,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 18:24:14,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917906785] [2020-10-12 18:24:14,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 18:24:14,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:24:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 18:24:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 18:24:14,963 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-12 18:24:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:24:14,998 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-12 18:24:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 18:24:14,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-12 18:24:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:24:15,000 INFO L225 Difference]: With dead ends: 39 [2020-10-12 18:24:15,000 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 18:24:15,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 18:24:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 18:24:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-12 18:24:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 18:24:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 18:24:15,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-12 18:24:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:24:15,010 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 18:24:15,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 18:24:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 18:24:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 18:24:15,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:15,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:24:15,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 18:24:15,012 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-10-12 18:24:15,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:15,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104470878] [2020-10-12 18:24:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 18:24:15,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:24:15,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-12 18:24:15,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 18:24:15,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 18:24:15,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 18:24:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:15,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:24:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:24:15,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:15,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:24:15,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:24:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:24:15,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:15,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:24:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 18:24:15,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:15,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 18:24:15,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 18:24:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:24:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 18:24:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:15,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 18:24:15,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 18:24:15,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:24:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 18:24:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 18:24:15,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:15,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 18:24:15,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:24:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 18:24:15,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:15,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:15,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:24:15,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:15,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 18:24:15,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:24:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:24:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 18:24:15,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104470878] [2020-10-12 18:24:15,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:24:15,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 18:24:15,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462255270] [2020-10-12 18:24:15,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 18:24:15,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:24:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 18:24:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 18:24:15,622 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-12 18:24:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:24:15,736 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-12 18:24:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 18:24:15,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 18:24:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:24:15,738 INFO L225 Difference]: With dead ends: 45 [2020-10-12 18:24:15,738 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 18:24:15,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-12 18:24:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 18:24:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-12 18:24:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 18:24:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 18:24:15,747 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-10-12 18:24:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:24:15,747 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 18:24:15,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 18:24:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 18:24:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 18:24:15,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:15,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:24:15,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 18:24:15,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-10-12 18:24:15,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:15,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512713996] [2020-10-12 18:24:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:16,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:16,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 18:24:16,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:24:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-12 18:24:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 18:24:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 18:24:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 18:24:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:16,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:24:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:16,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:16,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:24:16,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:16,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:24:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:16,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:16,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 18:24:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-12 18:24:16,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 18:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 18:24:16,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:17,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:17,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:17,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 18:24:17,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:17,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 18:24:17,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 18:24:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 18:24:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:17,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:17,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:17,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:17,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 18:24:17,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:17,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 18:24:17,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:24:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 18:24:17,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:17,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:17,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:17,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 18:24:17,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 18:24:17,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:24:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 18:24:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:24:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:24:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:24:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:24:17,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:24:17,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:24:17,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:24:17,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 18:24:17,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:24:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:24:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:24:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:24:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:24:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 18:24:17,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512713996] [2020-10-12 18:24:17,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:24:17,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 18:24:17,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204873087] [2020-10-12 18:24:17,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 18:24:17,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:24:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 18:24:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 18:24:17,256 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-12 18:24:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:24:17,368 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-12 18:24:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 18:24:17,369 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 18:24:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:24:17,370 INFO L225 Difference]: With dead ends: 51 [2020-10-12 18:24:17,370 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 18:24:17,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-12 18:24:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 18:24:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-12 18:24:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 18:24:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 18:24:17,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-10-12 18:24:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:24:17,379 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 18:24:17,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 18:24:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 18:24:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 18:24:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:24:17,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:24:17,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 18:24:17,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:24:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:24:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-10-12 18:24:17,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:24:17,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757987980] [2020-10-12 18:24:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:24:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 18:24:17,391 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 18:24:17,391 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 18:24:17,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 18:24:17,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 06:24:17 BoogieIcfgContainer [2020-10-12 18:24:17,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 18:24:17,423 INFO L168 Benchmark]: Toolchain (without parser) took 4854.31 ms. Allocated memory was 143.1 MB in the beginning and 274.7 MB in the end (delta: 131.6 MB). Free memory was 106.8 MB in the beginning and 193.8 MB in the end (delta: -87.0 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,426 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.65 ms. Allocated memory is still 143.1 MB. Free memory was 106.6 MB in the beginning and 97.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,433 INFO L168 Benchmark]: Boogie Preprocessor took 101.78 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 97.2 MB in the beginning and 184.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,434 INFO L168 Benchmark]: RCFGBuilder took 225.81 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 172.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,434 INFO L168 Benchmark]: TraceAbstraction took 4247.84 ms. Allocated memory was 205.0 MB in the beginning and 274.7 MB in the end (delta: 69.7 MB). Free memory was 171.6 MB in the beginning and 193.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-10-12 18:24:17,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.65 ms. Allocated memory is still 143.1 MB. Free memory was 106.6 MB in the beginning and 97.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.78 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 97.2 MB in the beginning and 184.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 225.81 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 172.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4247.84 ms. Allocated memory was 205.0 MB in the beginning and 274.7 MB in the end (delta: 69.7 MB). Free memory was 171.6 MB in the beginning and 193.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 47.6 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 50 SDslu, 458 SDs, 0 SdLazy, 187 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 7734 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 15/34 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...