/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=0.8 --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 08:01:08,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:01:08,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:01:08,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:01:08,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:01:08,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:01:08,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:01:08,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:01:08,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:01:08,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:01:08,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:01:08,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:01:08,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:01:08,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:01:08,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:01:08,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:01:08,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:01:08,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:01:08,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:01:08,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:01:08,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:01:08,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:01:08,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:01:08,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:01:08,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:01:08,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:01:08,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:01:08,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:01:08,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:01:08,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:01:08,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:01:08,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:01:08,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:01:08,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:01:08,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:01:08,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:01:08,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:01:08,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:01:08,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:01:08,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:01:08,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:01:08,907 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 08:01:08,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:01:08,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:01:08,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:01:08,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:01:08,936 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:01:08,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:01:08,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:01:08,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:01:08,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:01:08,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:01:08,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:01:08,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:01:08,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:01:08,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:01:08,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:01:08,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:01:08,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:01:08,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:01:08,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:01:08,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:01:08,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:01:08,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:08,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:01:08,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:01:08,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:01:08,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:01:08,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:01:08,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:01:08,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:01:08,941 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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;log-additional-information=true; [2020-09-25 08:01:09,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:01:09,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:01:09,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:01:09,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:01:09,511 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:01:09,512 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 08:01:09,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcfb2600c/8a28738395a84163b34c953d2b05f7fc/FLAG8758f08a4 [2020-09-25 08:01:10,174 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:01:10,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 08:01:10,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcfb2600c/8a28738395a84163b34c953d2b05f7fc/FLAG8758f08a4 [2020-09-25 08:01:10,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dcfb2600c/8a28738395a84163b34c953d2b05f7fc [2020-09-25 08:01:10,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:01:10,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:01:10,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:10,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:01:10,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:01:10,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10, skipping insertion in model container [2020-09-25 08:01:10,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:01:10,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:01:10,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:10,789 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:01:10,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:10,821 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:01:10,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10 WrapperNode [2020-09-25 08:01:10,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:10,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:01:10,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:01:10,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:01:10,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (1/1) ... [2020-09-25 08:01:10,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:01:10,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:01:10,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:01:10,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:01:10,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (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 08:01:11,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:01:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:01:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:01:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:01:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:01:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:01:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:01:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:01:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:01:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 08:01:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:01:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:01:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:01:11,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:01:11,286 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 08:01:11,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:11 BoogieIcfgContainer [2020-09-25 08:01:11,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:01:11,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:01:11,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:01:11,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:01:11,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:01:10" (1/3) ... [2020-09-25 08:01:11,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aed4867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:11, skipping insertion in model container [2020-09-25 08:01:11,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:10" (2/3) ... [2020-09-25 08:01:11,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aed4867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:11, skipping insertion in model container [2020-09-25 08:01:11,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:11" (3/3) ... [2020-09-25 08:01:11,328 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 08:01:11,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:01:11,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:01:11,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:01:11,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:01:11,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:01:11,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:01:11,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:01:11,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:01:11,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:01:11,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:01:11,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:01:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 08:01:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 08:01:11,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:11,441 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 08:01:11,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 08:01:11,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:11,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34823368] [2020-09-25 08:01:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:11,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:11,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:11,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 08:01:11,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:11,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-25 08:01:11,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:11,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:11,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:01:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:01:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:11,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:11,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:11,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:11,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:01:11,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:11,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:11,772 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 08:01:11,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34823368] [2020-09-25 08:01:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:11,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 08:01:11,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159376730] [2020-09-25 08:01:11,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 08:01:11,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 08:01:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:01:11,810 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-25 08:01:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:11,855 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-09-25 08:01:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 08:01:11,857 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-09-25 08:01:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:11,876 INFO L225 Difference]: With dead ends: 61 [2020-09-25 08:01:11,877 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 08:01:11,884 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 08:01:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 08:01:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 08:01:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 08:01:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-25 08:01:11,939 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-25 08:01:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:11,939 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-25 08:01:11,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 08:01:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-25 08:01:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 08:01:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:11,941 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 08:01:11,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:01:11,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-09-25 08:01:11,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:11,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602084638] [2020-09-25 08:01:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:12,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 08:01:12,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:12,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 08:01:12,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:12,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:12,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:12,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:12,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:01:12,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:12,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:12,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:12,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:12,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:12,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:12,277 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 08:01:12,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602084638] [2020-09-25 08:01:12,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:12,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:01:12,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513366228] [2020-09-25 08:01:12,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:01:12,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:01:12,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:01:12,282 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-09-25 08:01:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:12,350 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-25 08:01:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:01:12,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 08:01:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:12,353 INFO L225 Difference]: With dead ends: 40 [2020-09-25 08:01:12,353 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 08:01:12,356 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 08:01:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 08:01:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 08:01:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 08:01:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 08:01:12,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 08:01:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:12,370 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 08:01:12,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:01:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 08:01:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 08:01:12,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:12,375 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 08:01:12,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:01:12,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 08:01:12,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881031135] [2020-09-25 08:01:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:12,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 08:01:12,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:12,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-25 08:01:12,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:12,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:01:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 08:01:12,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:12,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:12,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:12,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:12,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:12,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:12,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:12,615 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 08:01:12,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881031135] [2020-09-25 08:01:12,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:12,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:01:12,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280247557] [2020-09-25 08:01:12,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:01:12,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:12,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:01:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:12,618 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 08:01:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:12,713 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 08:01:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 08:01:12,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 08:01:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:12,715 INFO L225 Difference]: With dead ends: 42 [2020-09-25 08:01:12,715 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 08:01:12,716 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 08:01:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 08:01:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 08:01:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 08:01:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 08:01:12,727 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 08:01:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:12,728 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 08:01:12,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:01:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 08:01:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 08:01:12,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:12,730 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 08:01:12,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:01:12,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 08:01:12,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:12,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31548288] [2020-09-25 08:01:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:12,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:13,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 08:01:13,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-09-25 08:01:13,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:13,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:13,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:13,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:13,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 08:01:13,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:01:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:13,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:13,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:13,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:13,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:01:13,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:13,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:13,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 08:01:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:13,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:13,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:01:13,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:13,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 08:01:13,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:13,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:01:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 08:01:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:13,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31548288] [2020-09-25 08:01:13,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:13,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 08:01:13,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526212713] [2020-09-25 08:01:13,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:01:13,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:01:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:13,597 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 08:01:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:13,817 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 08:01:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 08:01:13,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 08:01:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:13,819 INFO L225 Difference]: With dead ends: 46 [2020-09-25 08:01:13,820 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 08:01:13,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:01:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 08:01:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-25 08:01:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 08:01:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 08:01:13,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-25 08:01:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:13,835 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 08:01:13,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:01:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 08:01:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 08:01:13,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:13,838 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 08:01:13,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:01:13,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 08:01:13,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:13,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458883760] [2020-09-25 08:01:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:01:13,857 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:01:13,857 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:01:13,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:01:13,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:01:13 BoogieIcfgContainer [2020-09-25 08:01:13,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:01:13,889 INFO L168 Benchmark]: Toolchain (without parser) took 3365.18 ms. Allocated memory was 137.9 MB in the beginning and 229.6 MB in the end (delta: 91.8 MB). Free memory was 101.4 MB in the beginning and 132.7 MB in the end (delta: -31.3 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,892 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.97 ms. Allocated memory is still 137.9 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,895 INFO L168 Benchmark]: Boogie Preprocessor took 118.69 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 179.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,900 INFO L168 Benchmark]: RCFGBuilder took 363.95 ms. Allocated memory is still 199.2 MB. Free memory was 179.1 MB in the beginning and 163.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,901 INFO L168 Benchmark]: TraceAbstraction took 2578.62 ms. Allocated memory was 199.2 MB in the beginning and 229.6 MB in the end (delta: 30.4 MB). Free memory was 163.1 MB in the beginning and 132.7 MB in the end (delta: 30.3 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:13,912 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.97 ms. Allocated memory is still 137.9 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.69 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 179.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.95 ms. Allocated memory is still 199.2 MB. Free memory was 179.1 MB in the beginning and 163.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2578.62 ms. Allocated memory was 199.2 MB in the beginning and 229.6 MB in the end (delta: 30.4 MB). Free memory was 163.1 MB in the beginning and 132.7 MB in the end (delta: 30.3 MB). Peak memory consumption was 60.8 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