/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:35:29,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:35:29,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:35:29,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:35:29,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:35:29,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:35:29,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:35:29,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:35:29,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:35:29,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:35:29,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:35:29,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:35:29,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:35:29,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:35:29,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:35:29,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:35:29,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:35:29,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:35:29,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:35:29,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:35:29,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:35:29,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:35:29,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:35:29,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:35:29,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:35:29,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:35:29,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:35:29,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:35:29,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:35:29,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:35:29,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:35:29,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:35:29,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:35:29,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:35:29,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:35:29,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:35:29,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:35:29,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:35:29,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:35:29,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:35:29,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:35:29,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:35:29,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:35:29,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:35:29,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:35:29,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:35:29,497 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:35:29,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:35:29,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:35:29,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:35:29,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:35:29,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:35:29,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:35:29,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:35:29,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:35:29,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:35:29,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:35:29,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:35:29,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:35:29,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:35:29,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:35:29,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:35:29,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:35:29,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:35:29,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:35:29,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:35:29,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:35:29,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:35:29,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:35:29,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:35:29,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:35:29,832 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:35:29,833 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-14 05:35:29,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/699af655b/80460fda77f44d73863fc357ce53b303/FLAGc3a04a271 [2020-10-14 05:35:30,364 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:35:30,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-14 05:35:30,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/699af655b/80460fda77f44d73863fc357ce53b303/FLAGc3a04a271 [2020-10-14 05:35:30,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/699af655b/80460fda77f44d73863fc357ce53b303 [2020-10-14 05:35:30,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:35:30,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:35:30,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:35:30,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:35:30,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:35:30,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:35:30" (1/1) ... [2020-10-14 05:35:30,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2f52a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:30, skipping insertion in model container [2020-10-14 05:35:30,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:35:30" (1/1) ... [2020-10-14 05:35:30,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:35:30,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:35:30,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:35:30,997 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:35:31,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:35:31,034 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:35:31,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31 WrapperNode [2020-10-14 05:35:31,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:35:31,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:35:31,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:35:31,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:35:31,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... [2020-10-14 05:35:31,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:35:31,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:35:31,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:35:31,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:35:31,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:35:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:35:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:35:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:35:31,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:35:31,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:35:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:35:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:35:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:35:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:35:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:35:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:35:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:35:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:35:31,386 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:35:31,387 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:35:31,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:35:31 BoogieIcfgContainer [2020-10-14 05:35:31,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:35:31,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:35:31,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:35:31,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:35:31,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:35:30" (1/3) ... [2020-10-14 05:35:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d15e63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:35:31, skipping insertion in model container [2020-10-14 05:35:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:35:31" (2/3) ... [2020-10-14 05:35:31,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d15e63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:35:31, skipping insertion in model container [2020-10-14 05:35:31,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:35:31" (3/3) ... [2020-10-14 05:35:31,418 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-10-14 05:35:31,451 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:35:31,467 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:35:31,493 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:35:31,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:35:31,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:35:31,526 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:35:31,526 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:35:31,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:35:31,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:35:31,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:35:31,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:35:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 05:35:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:35:31,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:31,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:31,552 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-10-14 05:35:31,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:31,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305590480] [2020-10-14 05:35:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:31,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:31,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:35:31,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:35:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 05:35:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:31,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:31,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:35:31,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:31,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:35:31,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:31,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:31,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:35:31,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 05:35:31,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:31,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:35:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:31,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305590480] [2020-10-14 05:35:31,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:35:31,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:35:31,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538333639] [2020-10-14 05:35:31,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:35:31,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:35:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:35:31,942 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-14 05:35:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:31,969 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-10-14 05:35:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:35:31,971 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-14 05:35:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:31,981 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:35:31,982 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:35:31,985 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 [2020-10-14 05:35:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:35:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:35:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:35:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-14 05:35:32,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-10-14 05:35:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:32,021 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-14 05:35:32,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:35:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-14 05:35:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:35:32,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:32,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:32,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:35:32,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-10-14 05:35:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:32,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552584713] [2020-10-14 05:35:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:32,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:32,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:35:32,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:35:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 05:35:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:32,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:35:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:35:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:35:32,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:32,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:32,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:32,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:35:32,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:32,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:35:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:32,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:32,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552584713] [2020-10-14 05:35:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:35:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:35:32,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107530021] [2020-10-14 05:35:32,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:35:32,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:32,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:35:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:35:32,174 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-10-14 05:35:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:32,200 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-14 05:35:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:35:32,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-14 05:35:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:32,203 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:35:32,203 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:35:32,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:35:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:35:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:35:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:35:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-14 05:35:32,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-10-14 05:35:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:32,212 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-14 05:35:32,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:35:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-14 05:35:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:35:32,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:32,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:32,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:35:32,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-10-14 05:35:32,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:32,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630052433] [2020-10-14 05:35:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:32,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:35:32,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:32,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 05:35:32,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:32,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:35:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:35:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:35:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:32,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:35:32,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:32,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:35:32,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:32,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:32,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:32,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:32,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:32,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:32,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630052433] [2020-10-14 05:35:32,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:35:32,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:35:32,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675956284] [2020-10-14 05:35:32,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:35:32,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:35:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:35:32,433 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-14 05:35:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:32,513 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 05:35:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:35:32,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-14 05:35:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:32,515 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:35:32,516 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:35:32,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:35:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:35:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-14 05:35:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:35:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-14 05:35:32,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2020-10-14 05:35:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:32,527 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-14 05:35:32,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:35:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-14 05:35:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:35:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:32,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:32,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:35:32,529 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-10-14 05:35:32,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:32,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742280870] [2020-10-14 05:35:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:32,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:32,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:35:32,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:35:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-14 05:35:32,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:32,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:35:32,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:35:32,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:35:32,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:33,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:33,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:33,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:35:33,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:35:33,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:33,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:35:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:33,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:33,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:35:33,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:35:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 05:35:33,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:33,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:35:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:35:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:33,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742280870] [2020-10-14 05:35:33,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:35:33,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:35:33,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44891223] [2020-10-14 05:35:33,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:35:33,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:35:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:35:33,072 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-14 05:35:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:33,177 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-14 05:35:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:35:33,178 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:35:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:33,179 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:35:33,179 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:35:33,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:35:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:35:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-14 05:35:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:35:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-14 05:35:33,188 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2020-10-14 05:35:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:33,188 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-14 05:35:33,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:35:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-14 05:35:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:35:33,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:33,190 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] [2020-10-14 05:35:33,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:35:33,190 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:33,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:33,190 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-10-14 05:35:33,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:33,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547113706] [2020-10-14 05:35:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:35:33,200 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:35:33,200 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:35:33,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:35:33,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:35:33 BoogieIcfgContainer [2020-10-14 05:35:33,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:35:33,222 INFO L168 Benchmark]: Toolchain (without parser) took 2473.72 ms. Allocated memory was 145.2 MB in the beginning and 233.3 MB in the end (delta: 88.1 MB). Free memory was 101.7 MB in the beginning and 170.0 MB in the end (delta: -68.3 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,223 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.17 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,225 INFO L168 Benchmark]: Boogie Preprocessor took 105.14 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 180.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,226 INFO L168 Benchmark]: RCFGBuilder took 256.48 ms. Allocated memory is still 201.3 MB. Free memory was 180.9 MB in the beginning and 166.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,227 INFO L168 Benchmark]: TraceAbstraction took 1821.02 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 165.7 MB in the beginning and 170.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:35:33,231 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.17 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.14 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 180.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.48 ms. Allocated memory is still 201.3 MB. Free memory was 180.9 MB in the beginning and 166.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1821.02 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 165.7 MB in the beginning and 170.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 27.7 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