/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:06,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:06,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:06,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:06,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:06,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:06,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:06,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:06,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:06,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:06,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:06,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:06,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:06,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:06,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:06,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:06,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:06,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:06,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:06,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:06,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:06,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:06,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:06,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:06,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:06,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:06,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:06,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:06,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:06,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:06,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:06,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:06,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:06,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:06,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:06,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:06,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:06,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:06,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:06,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:06,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:06,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:06,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:06,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:06,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:06,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:06,839 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:06,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:06,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:06,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:06,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:06,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:06,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:06,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:06,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:06,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:06,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:06,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:06,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:06,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:06,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:06,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:06,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:06,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:06,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:06,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:06,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:06,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:06,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:06,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:06,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:06,846 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:07,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:07,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:07,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:07,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:07,369 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:07,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 09:10:07,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5576e1ad/d022fb970e9148f0b8b12e874eabc31e/FLAG1fd460acc [2020-09-25 09:10:08,041 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:08,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 09:10:08,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5576e1ad/d022fb970e9148f0b8b12e874eabc31e/FLAG1fd460acc [2020-09-25 09:10:08,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5576e1ad/d022fb970e9148f0b8b12e874eabc31e [2020-09-25 09:10:08,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:08,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:08,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:08,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:08,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:08,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d5d771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08, skipping insertion in model container [2020-09-25 09:10:08,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:08,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:08,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:08,700 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:08,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:08,755 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:08,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08 WrapperNode [2020-09-25 09:10:08,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:08,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:08,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:08,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:08,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:08,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:08,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:08,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:08,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:10:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:10:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:10:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:10:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:09,275 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:09,275 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:10:09,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:09 BoogieIcfgContainer [2020-09-25 09:10:09,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:09,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:09,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:09,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:09,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:08" (1/3) ... [2020-09-25 09:10:09,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c26fb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:09, skipping insertion in model container [2020-09-25 09:10:09,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (2/3) ... [2020-09-25 09:10:09,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c26fb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:09, skipping insertion in model container [2020-09-25 09:10:09,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:09" (3/3) ... [2020-09-25 09:10:09,291 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 09:10:09,311 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:09,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:09,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:09,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:09,412 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:09,412 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:09,412 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:09,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:09,413 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:09,413 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:09,413 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 09:10:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 09:10:09,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:09,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:09,454 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 09:10:09,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:09,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502792143] [2020-09-25 09:10:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:09,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:09,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 09:10:09,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-25 09:10:09,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:09,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:10:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:09,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:10:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:09,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:09,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:09,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:09,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:09,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:10:09,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:09,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:09,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:09,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:09,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:09,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502792143] [2020-09-25 09:10:09,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:09,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:09,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768942389] [2020-09-25 09:10:09,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:09,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:09,840 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-25 09:10:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:09,873 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-09-25 09:10:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:09,874 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-09-25 09:10:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:09,893 INFO L225 Difference]: With dead ends: 61 [2020-09-25 09:10:09,893 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:10:09,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:10:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 09:10:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 09:10:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-25 09:10:09,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-25 09:10:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:09,963 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-25 09:10:09,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-25 09:10:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 09:10:09,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:09,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:09,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:09,966 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-09-25 09:10:09,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:09,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425733259] [2020-09-25 09:10:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:09,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 09:10:10,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 09:10:10,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:10:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:10,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:10,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:10,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:10,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:10,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:10,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:10,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425733259] [2020-09-25 09:10:10,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:10,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:10,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205511244] [2020-09-25 09:10:10,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:10,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:10,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:10,248 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-09-25 09:10:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:10,328 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-25 09:10:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:10:10,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 09:10:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:10,331 INFO L225 Difference]: With dead ends: 40 [2020-09-25 09:10:10,331 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 09:10:10,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 09:10:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 09:10:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 09:10:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 09:10:10,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 09:10:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:10,341 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 09:10:10,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 09:10:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 09:10:10,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:10,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:10,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:10,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 09:10:10,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:10,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344084269] [2020-09-25 09:10:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:10,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:10:10,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:10,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-09-25 09:10:10,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:10:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:10,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:10,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:10,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:10,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344084269] [2020-09-25 09:10:10,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:10:10,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371902155] [2020-09-25 09:10:10,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:10:10,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:10:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:10,657 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 09:10:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:10,772 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 09:10:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:10:10,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 09:10:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:10,775 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:10:10,775 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 09:10:10,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:10:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 09:10:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 09:10:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 09:10:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 09:10:10,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 09:10:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:10,788 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 09:10:10,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:10:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 09:10:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 09:10:10,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:10,790 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:10,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:10,791 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 09:10:10,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:10,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962250360] [2020-09-25 09:10:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:10,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:11,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 09:10:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-09-25 09:10:11,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:11,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 09:10:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:11,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:11,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:11,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:11,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:11,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:11,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:11,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:11,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:11,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:11,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:11,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:11,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 09:10:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:11,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:11,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:11,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962250360] [2020-09-25 09:10:11,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:11,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:10:11,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740865019] [2020-09-25 09:10:11,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:10:11,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:10:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:10:11,574 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 10 states. [2020-09-25 09:10:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:11,830 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 09:10:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:10:11,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-25 09:10:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:11,832 INFO L225 Difference]: With dead ends: 46 [2020-09-25 09:10:11,833 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 09:10:11,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 09:10:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-25 09:10:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 09:10:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 09:10:11,842 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-25 09:10:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:11,842 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 09:10:11,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:10:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 09:10:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:10:11,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:11,844 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:11,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:11,844 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 09:10:11,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:11,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147474046] [2020-09-25 09:10:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:10:11,858 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:10:11,858 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:10:11,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:11,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:11 BoogieIcfgContainer [2020-09-25 09:10:11,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:10:11,888 INFO L168 Benchmark]: Toolchain (without parser) took 3496.13 ms. Allocated memory was 108.5 MB in the beginning and 185.1 MB in the end (delta: 76.5 MB). Free memory was 73.3 MB in the beginning and 134.6 MB in the end (delta: -61.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,889 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 108.5 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.12 ms. Allocated memory was 108.5 MB in the beginning and 123.2 MB in the end (delta: 14.7 MB). Free memory was 72.6 MB in the beginning and 99.9 MB in the end (delta: -27.3 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,891 INFO L168 Benchmark]: Boogie Preprocessor took 160.85 ms. Allocated memory was 123.2 MB in the beginning and 159.9 MB in the end (delta: 36.7 MB). Free memory was 99.9 MB in the beginning and 145.7 MB in the end (delta: -45.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,892 INFO L168 Benchmark]: RCFGBuilder took 360.82 ms. Allocated memory is still 159.9 MB. Free memory was 145.7 MB in the beginning and 131.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,893 INFO L168 Benchmark]: TraceAbstraction took 2601.93 ms. Allocated memory was 159.9 MB in the beginning and 185.1 MB in the end (delta: 25.2 MB). Free memory was 131.3 MB in the beginning and 134.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:11,897 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 108.5 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 362.12 ms. Allocated memory was 108.5 MB in the beginning and 123.2 MB in the end (delta: 14.7 MB). Free memory was 72.6 MB in the beginning and 99.9 MB in the end (delta: -27.3 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.85 ms. Allocated memory was 123.2 MB in the beginning and 159.9 MB in the end (delta: 36.7 MB). Free memory was 99.9 MB in the beginning and 145.7 MB in the end (delta: -45.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.82 ms. Allocated memory is still 159.9 MB. Free memory was 145.7 MB in the beginning and 131.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2601.93 ms. Allocated memory was 159.9 MB in the beginning and 185.1 MB in the end (delta: 25.2 MB). Free memory was 131.3 MB in the beginning and 134.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i