/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=LOWLEXORDER --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/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:34:48,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:34:48,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:34:48,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:34:48,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:34:48,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:34:48,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:34:48,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:34:48,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:34:48,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:34:48,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:34:48,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:34:48,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:34:48,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:34:48,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:34:48,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:34:48,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:34:48,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:34:48,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:34:48,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:34:48,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:34:48,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:34:48,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:34:48,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:34:48,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:34:48,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:34:48,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:34:48,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:34:48,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:34:48,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:34:48,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:34:48,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:34:48,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:34:48,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:34:48,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:34:48,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:34:48,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:34:48,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:34:48,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:34:48,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:34:48,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:34:48,574 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 [2020-09-24 21:34:48,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:34:48,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:34:48,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:34:48,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:34:48,631 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:34:48,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:34:48,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:34:48,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:34:48,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:34:48,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:34:48,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:34:48,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:34:48,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:34:48,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:34:48,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:34:48,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:34:48,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:34:48,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:34:48,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:34:48,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:34:48,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:34:48,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:34:48,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:34:48,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:34:48,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:34:48,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:34:48,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:34:48,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:34:48,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:34:48,638 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:34:49,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:34:49,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:34:49,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:34:49,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:34:49,170 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:34:49,171 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-24 21:34:49,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc72c7b2e/7dc40a3f00fd49809607bb1570d39567/FLAGd630c4b03 [2020-09-24 21:34:49,792 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:34:49,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-24 21:34:49,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc72c7b2e/7dc40a3f00fd49809607bb1570d39567/FLAGd630c4b03 [2020-09-24 21:34:50,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc72c7b2e/7dc40a3f00fd49809607bb1570d39567 [2020-09-24 21:34:50,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:34:50,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:34:50,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:34:50,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:34:50,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:34:50,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50, skipping insertion in model container [2020-09-24 21:34:50,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:34:50,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:34:50,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:34:50,463 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:34:50,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:34:50,504 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:34:50,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50 WrapperNode [2020-09-24 21:34:50,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:34:50,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:34:50,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:34:50,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:34:50,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (1/1) ... [2020-09-24 21:34:50,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:34:50,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:34:50,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:34:50,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:34:50,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (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 [2020-09-24 21:34:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:34:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:34:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 21:34:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:34:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 21:34:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:34:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 21:34:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:34:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:34:50,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:34:50,898 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:34:50,899 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:34:50,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:34:50 BoogieIcfgContainer [2020-09-24 21:34:50,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:34:50,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:34:50,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:34:50,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:34:50,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:34:50" (1/3) ... [2020-09-24 21:34:50,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c30b248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:34:50, skipping insertion in model container [2020-09-24 21:34:50,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:34:50" (2/3) ... [2020-09-24 21:34:50,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c30b248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:34:50, skipping insertion in model container [2020-09-24 21:34:50,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:34:50" (3/3) ... [2020-09-24 21:34:50,917 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-09-24 21:34:50,927 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:34:50,936 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:34:50,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:34:50,989 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:34:50,989 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:34:50,990 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:34:50,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:34:50,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:34:50,990 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:34:50,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:34:50,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:34:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 21:34:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:34:51,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:51,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:34:51,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-09-24 21:34:51,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:51,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690828684] [2020-09-24 21:34:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:51,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:51,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:34:51,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:34:51,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:34:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:34:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:34:51,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:34:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:51,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:51,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:51,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:34:51,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:34:51,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:34:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:34:51,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:34:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:51,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:51,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:34:51,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:51,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 21:34:51,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:34:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:51,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:51,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:34:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:34:51,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690828684] [2020-09-24 21:34:51,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:34:51,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:34:51,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415764075] [2020-09-24 21:34:51,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:34:51,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:34:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:34:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:34:51,481 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-24 21:34:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:34:51,577 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-24 21:34:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:34:51,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 21:34:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:34:51,593 INFO L225 Difference]: With dead ends: 37 [2020-09-24 21:34:51,593 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 21:34:51,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:34:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 21:34:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-24 21:34:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 21:34:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 21:34:51,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-09-24 21:34:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:34:51,652 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 21:34:51,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:34:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 21:34:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 21:34:51,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:51,655 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] [2020-09-24 21:34:51,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:34:51,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-09-24 21:34:51,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:51,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403839460] [2020-09-24 21:34:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:51,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:51,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:51,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 21:34:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-09-24 21:34:51,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:34:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 21:34:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:34:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:52,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:34:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:34:52,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:34:52,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:34:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:34:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:34:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:34:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:34:52,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-24 21:34:52,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:34:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:34:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:34:52,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:34:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 21:34:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:34:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 21:34:52,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403839460] [2020-09-24 21:34:52,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:34:52,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:34:52,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007858739] [2020-09-24 21:34:52,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:34:52,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:34:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:34:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:34:52,387 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-09-24 21:34:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:34:52,486 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-24 21:34:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:34:52,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-24 21:34:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:34:52,489 INFO L225 Difference]: With dead ends: 31 [2020-09-24 21:34:52,489 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 21:34:52,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:34:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 21:34:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-24 21:34:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 21:34:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 21:34:52,498 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-09-24 21:34:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:34:52,499 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 21:34:52,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:34:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 21:34:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 21:34:52,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:52,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:34:52,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:34:52,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:52,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1416732684, now seen corresponding path program 2 times [2020-09-24 21:34:52,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:52,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917916467] [2020-09-24 21:34:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:34:52,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-09-24 21:34:52,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:34:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:34:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:34:52,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:34:52,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:34:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:34:52,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:34:52,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:34:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:34:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:34:52,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:34:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 21:34:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 21:34:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:34:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:34:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:34:52,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:53,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:53,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:34:53,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:53,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:34:53,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:34:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:34:53,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:53,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:53,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:53,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:34:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 21:34:53,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:34:53,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:53,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:53,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:34:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:34:53,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917916467] [2020-09-24 21:34:53,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:34:53,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:34:53,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605894221] [2020-09-24 21:34:53,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:34:53,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:34:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:34:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:34:53,167 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-09-24 21:34:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:34:53,289 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-09-24 21:34:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:34:53,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 21:34:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:34:53,296 INFO L225 Difference]: With dead ends: 35 [2020-09-24 21:34:53,296 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:34:53,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:34:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:34:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 21:34:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 21:34:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 21:34:53,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 30 [2020-09-24 21:34:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:34:53,311 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 21:34:53,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:34:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 21:34:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:34:53,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:53,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:34:53,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:34:53,315 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash -209476043, now seen corresponding path program 3 times [2020-09-24 21:34:53,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:53,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431610660] [2020-09-24 21:34:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:34:53,337 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:34:53,337 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:34:53,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:34:53,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:34:53 BoogieIcfgContainer [2020-09-24 21:34:53,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:34:53,379 INFO L168 Benchmark]: Toolchain (without parser) took 3189.28 ms. Allocated memory was 138.9 MB in the beginning and 232.3 MB in the end (delta: 93.3 MB). Free memory was 101.0 MB in the beginning and 143.2 MB in the end (delta: -42.3 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,380 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.52 ms. Allocated memory is still 138.9 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,383 INFO L168 Benchmark]: Boogie Preprocessor took 32.30 ms. Allocated memory is still 138.9 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,386 INFO L168 Benchmark]: RCFGBuilder took 365.33 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 89.8 MB in the beginning and 168.3 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,392 INFO L168 Benchmark]: TraceAbstraction took 2469.60 ms. Allocated memory was 199.8 MB in the beginning and 232.3 MB in the end (delta: 32.5 MB). Free memory was 168.3 MB in the beginning and 143.2 MB in the end (delta: 25.1 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:53,404 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.52 ms. Allocated memory is still 138.9 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.30 ms. Allocated memory is still 138.9 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.33 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 89.8 MB in the beginning and 168.3 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2469.60 ms. Allocated memory was 199.8 MB in the beginning and 232.3 MB in the end (delta: 32.5 MB). Free memory was 168.3 MB in the beginning and 143.2 MB in the end (delta: 25.1 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 8 SDslu, 309 SDs, 0 SdLazy, 60 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/19 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...