/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:40:52,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:40:52,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:40:52,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:40:52,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:40:52,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:40:52,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:40:52,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:40:52,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:40:52,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:40:52,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:40:52,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:40:52,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:40:52,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:40:52,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:40:52,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:40:52,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:40:52,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:40:52,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:40:52,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:40:52,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:40:52,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:40:52,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:40:52,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:40:52,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:40:52,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:40:52,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:40:52,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:40:52,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:40:52,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:40:52,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:40:52,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:40:52,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:40:52,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:40:52,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:40:52,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:40:52,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:40:52,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:40:52,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:40:52,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:40:52,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:40:52,176 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 20:40:52,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:40:52,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:40:52,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:40:52,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:40:52,207 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:40:52,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:40:52,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:40:52,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:40:52,209 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:40:52,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:40:52,209 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:40:52,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:40:52,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:40:52,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:40:52,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:40:52,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:40:52,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:40:52,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:40:52,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:40:52,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:40:52,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:40:52,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:40:52,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:40:52,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:40:52,212 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:40:52,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:40:52,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:40:52,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:40:52,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:40:52,673 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:40:52,674 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 20:40:52,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d630e968/c944a7b20ea144da9cfbc74d2fd6da94/FLAGd489b2290 [2020-09-24 20:40:53,309 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:40:53,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 20:40:53,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d630e968/c944a7b20ea144da9cfbc74d2fd6da94/FLAGd489b2290 [2020-09-24 20:40:53,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d630e968/c944a7b20ea144da9cfbc74d2fd6da94 [2020-09-24 20:40:53,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:40:53,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:40:53,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:53,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:40:53,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:40:53,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:53" (1/1) ... [2020-09-24 20:40:53,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c54ab82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:53, skipping insertion in model container [2020-09-24 20:40:53,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:53" (1/1) ... [2020-09-24 20:40:53,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:40:53,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:40:53,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:53,972 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:40:53,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:54,008 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:40:54,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54 WrapperNode [2020-09-24 20:40:54,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:54,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:40:54,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:40:54,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:40:54,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (1/1) ... [2020-09-24 20:40:54,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:40:54,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:40:54,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:40:54,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:40:54,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (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 20:40:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:40:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:40:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:40:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:40:54,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:40:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:40:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:40:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:40:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:40:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:40:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:40:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:40:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:40:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:40:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:40:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:40:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:40:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:40:54,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:40:54,550 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 20:40:54,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:54 BoogieIcfgContainer [2020-09-24 20:40:54,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:40:54,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:40:54,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:40:54,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:40:54,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:40:53" (1/3) ... [2020-09-24 20:40:54,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc17cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:54, skipping insertion in model container [2020-09-24 20:40:54,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:54" (2/3) ... [2020-09-24 20:40:54,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc17cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:54, skipping insertion in model container [2020-09-24 20:40:54,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:54" (3/3) ... [2020-09-24 20:40:54,566 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-09-24 20:40:54,577 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:40:54,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:40:54,607 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:40:54,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:40:54,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:40:54,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:40:54,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:40:54,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:40:54,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:40:54,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:40:54,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:40:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-09-24 20:40:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:40:54,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:54,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:54,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -386984160, now seen corresponding path program 1 times [2020-09-24 20:40:54,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:54,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790555414] [2020-09-24 20:40:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:54,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 20:40:55,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:55,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-09-24 20:40:55,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 20:40:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:55,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:40:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:40:55,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:55,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 20:40:55,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:55,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:55,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:55,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:55,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:40:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:40:55,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:55,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:40:55,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:55,203 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 20:40:55,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790555414] [2020-09-24 20:40:55,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:40:55,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 20:40:55,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060986012] [2020-09-24 20:40:55,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 20:40:55,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 20:40:55,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 20:40:55,234 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-09-24 20:40:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:55,398 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-09-24 20:40:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 20:40:55,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 20:40:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:55,411 INFO L225 Difference]: With dead ends: 107 [2020-09-24 20:40:55,412 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 20:40:55,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 20:40:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 20:40:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 20:40:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 20:40:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-24 20:40:55,468 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 31 [2020-09-24 20:40:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:55,469 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-24 20:40:55,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 20:40:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-24 20:40:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:40:55,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:55,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:55,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:40:55,472 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1278196063, now seen corresponding path program 1 times [2020-09-24 20:40:55,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:55,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435116274] [2020-09-24 20:40:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:56,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 20:40:56,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:40:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-09-24 20:40:56,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:40:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 20:40:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 20:40:56,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:56,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:56,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:40:56,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:56,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:40:56,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:56,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:56,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:40:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:56,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:40:56,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:40:56,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:56,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:56,229 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 20:40:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435116274] [2020-09-24 20:40:56,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:40:56,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:40:56,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463390963] [2020-09-24 20:40:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:40:56,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:40:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:40:56,233 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2020-09-24 20:40:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:56,474 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-09-24 20:40:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:40:56,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-24 20:40:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:56,478 INFO L225 Difference]: With dead ends: 108 [2020-09-24 20:40:56,478 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 20:40:56,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:40:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 20:40:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-24 20:40:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 20:40:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 20:40:56,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 31 [2020-09-24 20:40:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:56,497 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 20:40:56,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:40:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 20:40:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 20:40:56,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:56,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:56,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:40:56,499 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash -620119431, now seen corresponding path program 1 times [2020-09-24 20:40:56,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:56,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988898908] [2020-09-24 20:40:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:58,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:40:58,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:40:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-09-24 20:40:58,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:40:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:40:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 20:40:58,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:58,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:58,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:40:58,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:58,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:40:58,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:58,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:40:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:58,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:40:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:40:58,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:40:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988898908] [2020-09-24 20:40:58,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:40:58,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611529882] [2020-09-24 20:40:58,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:40:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:40:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:40:58,659 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-09-24 20:40:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:59,599 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2020-09-24 20:40:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 20:40:59,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-24 20:40:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:59,603 INFO L225 Difference]: With dead ends: 156 [2020-09-24 20:40:59,604 INFO L226 Difference]: Without dead ends: 154 [2020-09-24 20:40:59,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 20:40:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-24 20:40:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2020-09-24 20:40:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 20:40:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2020-09-24 20:40:59,634 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 46 [2020-09-24 20:40:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:59,635 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2020-09-24 20:40:59,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:40:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2020-09-24 20:40:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:40:59,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:59,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:59,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:40:59,642 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1321326334, now seen corresponding path program 1 times [2020-09-24 20:40:59,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:59,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971574074] [2020-09-24 20:40:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:40:59,681 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:40:59,681 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:40:59,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:40:59,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:40:59 BoogieIcfgContainer [2020-09-24 20:40:59,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:40:59,728 INFO L168 Benchmark]: Toolchain (without parser) took 6058.66 ms. Allocated memory was 141.0 MB in the beginning and 277.9 MB in the end (delta: 136.8 MB). Free memory was 104.2 MB in the beginning and 213.8 MB in the end (delta: -109.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:40:59,730 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 20:40:59,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.95 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:40:59,733 INFO L168 Benchmark]: Boogie Preprocessor took 124.60 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:40:59,734 INFO L168 Benchmark]: RCFGBuilder took 421.64 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.3 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:40:59,741 INFO L168 Benchmark]: TraceAbstraction took 5163.95 ms. Allocated memory was 203.9 MB in the beginning and 277.9 MB in the end (delta: 73.9 MB). Free memory was 162.3 MB in the beginning and 213.8 MB in the end (delta: -51.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:40:59,750 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.95 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.60 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.64 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.3 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5163.95 ms. Allocated memory was 203.9 MB in the beginning and 277.9 MB in the end (delta: 73.9 MB). Free memory was 162.3 MB in the beginning and 213.8 MB in the end (delta: -51.5 MB). Peak memory consumption was 22.5 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: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] int *a = malloc(sizeof(int)*N); [L28] i=0 [L28] COND TRUE i N [L36] EXPR a[i] [L36] a[i] = a[i] [L33] i++ [L33] COND FALSE !(i