/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=NARROWEST --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/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:58:24,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:58:24,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:58:24,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:58:24,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:58:24,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:58:24,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:58:24,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:58:24,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:58:24,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:58:24,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:58:24,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:58:24,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:58:24,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:58:24,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:58:24,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:58:24,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:58:24,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:58:24,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:58:24,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:58:24,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:58:24,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:58:24,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:58:24,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:58:24,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:58:24,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:58:24,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:58:24,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:58:24,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:58:24,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:58:24,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:58:24,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:58:24,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:58:24,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:58:24,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:58:24,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:58:24,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:58:24,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:58:24,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:58:24,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:58:24,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:58:24,694 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 [2020-10-13 04:58:24,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:58:24,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:58:24,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:58:24,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:58:24,717 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:58:24,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:58:24,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:58:24,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:58:24,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:58:24,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:58:24,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:58:24,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:58:24,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:58:24,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:58:24,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:58:24,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:58:24,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:58:24,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:58:24,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:58:24,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:58:24,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:58:24,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:58:24,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:58:24,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:58:24,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:58:24,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:58:24,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:58:24,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:58:24,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:58:24,722 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:58:24,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:58:25,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:58:25,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:58:25,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:58:25,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:58:25,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2020-10-13 04:58:25,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51cfe941d/55983514d1644602a4230d492f90bdc0/FLAGd77951df0 [2020-10-13 04:58:25,491 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:58:25,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2020-10-13 04:58:25,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51cfe941d/55983514d1644602a4230d492f90bdc0/FLAGd77951df0 [2020-10-13 04:58:25,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51cfe941d/55983514d1644602a4230d492f90bdc0 [2020-10-13 04:58:25,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:58:25,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:58:25,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:25,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:58:25,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:58:25,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:25" (1/1) ... [2020-10-13 04:58:25,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ed4b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:25, skipping insertion in model container [2020-10-13 04:58:25,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:25" (1/1) ... [2020-10-13 04:58:25,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:58:25,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:58:26,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:26,155 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:58:26,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:26,190 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:58:26,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26 WrapperNode [2020-10-13 04:58:26,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:26,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:58:26,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:58:26,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:58:26,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (1/1) ... [2020-10-13 04:58:26,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:58:26,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:58:26,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:58:26,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:58:26,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (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 [2020-10-13 04:58:26,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:58:26,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:58:26,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:58:26,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:58:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:58:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:58:26,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:58:26,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:58:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:58:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:58:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:58:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:58:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:58:26,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:58:26,580 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 04:58:26,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:26 BoogieIcfgContainer [2020-10-13 04:58:26,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:58:26,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:58:26,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:58:26,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:58:26,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:58:25" (1/3) ... [2020-10-13 04:58:26,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3d43f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:26, skipping insertion in model container [2020-10-13 04:58:26,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:26" (2/3) ... [2020-10-13 04:58:26,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3d43f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:26, skipping insertion in model container [2020-10-13 04:58:26,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:26" (3/3) ... [2020-10-13 04:58:26,591 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2020-10-13 04:58:26,601 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:58:26,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:58:26,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:58:26,639 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:58:26,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:58:26,639 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:58:26,639 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:58:26,639 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:58:26,640 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:58:26,640 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:58:26,640 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:58:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 04:58:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:58:26,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:26,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:26,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1429065311, now seen corresponding path program 1 times [2020-10-13 04:58:26,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:26,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23084206] [2020-10-13 04:58:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 04:58:27,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:27,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-13 04:58:27,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:58:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:58:27,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:27,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:27,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:58:27,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:27,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23084206] [2020-10-13 04:58:27,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:27,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:58:27,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643359065] [2020-10-13 04:58:27,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:58:27,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:58:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:27,244 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 04:58:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:27,379 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-13 04:58:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:58:27,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 04:58:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:27,390 INFO L225 Difference]: With dead ends: 30 [2020-10-13 04:58:27,390 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 04:58:27,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 04:58:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 04:58:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 04:58:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 04:58:27,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 04:58:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:27,432 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 04:58:27,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:58:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 04:58:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:58:27,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:27,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:27,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:58:27,434 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash 399010521, now seen corresponding path program 1 times [2020-10-13 04:58:27,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:27,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982945748] [2020-10-13 04:58:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 04:58:27,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:27,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-13 04:58:27,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:58:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:58:27,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:27,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:27,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:27,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:58:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:27,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:27,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982945748] [2020-10-13 04:58:27,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:27,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:58:27,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797872993] [2020-10-13 04:58:27,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:58:27,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:58:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:58:27,685 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 04:58:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:27,722 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 04:58:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:58:27,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 04:58:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:27,724 INFO L225 Difference]: With dead ends: 24 [2020-10-13 04:58:27,724 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 04:58:27,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:58:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 04:58:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-13 04:58:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 04:58:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 04:58:27,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-13 04:58:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:27,744 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 04:58:27,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:58:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 04:58:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:58:27,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:27,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:27,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:58:27,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1207654839, now seen corresponding path program 1 times [2020-10-13 04:58:27,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:27,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699759631] [2020-10-13 04:58:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:58:27,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:27,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-13 04:58:27,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:58:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:58:27,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:28,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:28,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:28,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:28,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699759631] [2020-10-13 04:58:28,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:28,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:58:28,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743481280] [2020-10-13 04:58:28,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:58:28,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:28,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:58:28,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:28,014 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-13 04:58:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:28,059 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-13 04:58:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:58:28,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 04:58:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:28,061 INFO L225 Difference]: With dead ends: 26 [2020-10-13 04:58:28,061 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 04:58:28,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 04:58:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-13 04:58:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 04:58:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 04:58:28,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-13 04:58:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:28,067 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 04:58:28,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:58:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 04:58:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:58:28,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:28,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:28,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:58:28,068 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash 925763861, now seen corresponding path program 2 times [2020-10-13 04:58:28,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:28,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103314684] [2020-10-13 04:58:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:58:28,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:28,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-13 04:58:28,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:58:28,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:58:28,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:58:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:28,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:28,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:58:28,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103314684] [2020-10-13 04:58:28,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:28,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 04:58:28,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250755745] [2020-10-13 04:58:28,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:58:28,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:58:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:28,321 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-13 04:58:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:28,390 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-13 04:58:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:58:28,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 04:58:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:28,392 INFO L225 Difference]: With dead ends: 23 [2020-10-13 04:58:28,392 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 04:58:28,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 04:58:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 04:58:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 04:58:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 04:58:28,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-13 04:58:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:28,398 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 04:58:28,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:58:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 04:58:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:58:28,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:28,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:28,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:58:28,400 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 598752024, now seen corresponding path program 1 times [2020-10-13 04:58:28,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:28,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803881806] [2020-10-13 04:58:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:58:28,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:28,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 04:58:28,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:58:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:58:28,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:28,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:28,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:28,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:28,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:58:28,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803881806] [2020-10-13 04:58:28,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:28,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:58:28,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647844429] [2020-10-13 04:58:28,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:58:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:58:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:28,770 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-13 04:58:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:28,818 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 04:58:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:58:28,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 04:58:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:28,820 INFO L225 Difference]: With dead ends: 32 [2020-10-13 04:58:28,820 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:58:28,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:58:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 04:58:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:58:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 04:58:28,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-13 04:58:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:28,826 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 04:58:28,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:58:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 04:58:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:58:28,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:28,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:28,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:58:28,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash -786429066, now seen corresponding path program 2 times [2020-10-13 04:58:28,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:28,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613411194] [2020-10-13 04:58:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:58:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-13 04:58:29,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:58:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:58:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:58:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:29,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:29,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:29,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:29,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:58:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613411194] [2020-10-13 04:58:29,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:29,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:58:29,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183317882] [2020-10-13 04:58:29,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:58:29,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:58:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:29,356 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-10-13 04:58:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:29,463 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-13 04:58:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:58:29,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-13 04:58:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:29,465 INFO L225 Difference]: With dead ends: 27 [2020-10-13 04:58:29,465 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:58:29,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:58:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 04:58:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:58:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 04:58:29,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-13 04:58:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:29,471 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 04:58:29,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:58:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 04:58:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:58:29,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:29,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:29,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:58:29,473 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash 153823545, now seen corresponding path program 3 times [2020-10-13 04:58:29,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:29,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419056826] [2020-10-13 04:58:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:58:29,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:29,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-13 04:58:29,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:58:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:58:29,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:29,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:29,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:58:29,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419056826] [2020-10-13 04:58:29,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:29,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:58:29,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101068495] [2020-10-13 04:58:29,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:58:29,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:58:29,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:29,877 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-13 04:58:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:29,916 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 04:58:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:58:29,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 04:58:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:29,918 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:58:29,918 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:58:29,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:58:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 04:58:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:58:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 04:58:29,923 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-13 04:58:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:29,924 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 04:58:29,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:58:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 04:58:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:58:29,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:29,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:29,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:58:29,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -547382633, now seen corresponding path program 4 times [2020-10-13 04:58:29,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:29,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679200257] [2020-10-13 04:58:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:30,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:58:30,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-13 04:58:30,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:58:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:58:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:58:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:30,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:30,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:30,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:30,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:30,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:30,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:30,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:30,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:30,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:58:30,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679200257] [2020-10-13 04:58:30,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:30,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:58:30,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233790136] [2020-10-13 04:58:30,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:58:30,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:58:30,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:30,847 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-13 04:58:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:30,954 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-10-13 04:58:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:58:30,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 04:58:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:30,955 INFO L225 Difference]: With dead ends: 26 [2020-10-13 04:58:30,956 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 04:58:30,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 04:58:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 04:58:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 04:58:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 04:58:30,957 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-13 04:58:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:30,958 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 04:58:30,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:58:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 04:58:30,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 04:58:30,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:58:30,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 04:58:31,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 04:58:31,012 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= ~__return_60~0 |old(~__return_60~0)|)) [2020-10-13 04:58:31,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 04:58:31,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 04:58:31,012 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 04:58:31,013 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point L27(lines 27 50) no Hoare annotation was computed. [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 7 61) no Hoare annotation was computed. [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 7 61) no Hoare annotation was computed. [2020-10-13 04:58:31,013 INFO L271 CegarLoopResult]: At program point L15-3(lines 15 18) the Hoare annotation is: true [2020-10-13 04:58:31,013 INFO L268 CegarLoopResult]: For program point L15-4(lines 8 61) no Hoare annotation was computed. [2020-10-13 04:58:31,014 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2020-10-13 04:58:31,014 INFO L264 CegarLoopResult]: At program point L30(lines 23 51) the Hoare annotation is: (and (= main_~main__marker~0 (select (select |#memory_int| |main_~#main__a~0.base|) (+ |main_~#main__a~0.offset| (* main_~main__pos~0 4)))) (<= 0 main_~main__pos~0) (<= main_~main__i~0 main_~main__pos~0)) [2020-10-13 04:58:31,014 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 7 61) the Hoare annotation is: (and (= |old(#valid)| |#valid|) (= |old(~__return_60~0)| ~__return_60~0)) [2020-10-13 04:58:31,014 INFO L268 CegarLoopResult]: For program point L22(lines 22 55) no Hoare annotation was computed. [2020-10-13 04:58:31,014 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-10-13 04:58:31,015 INFO L268 CegarLoopResult]: For program point L39(lines 39 48) no Hoare annotation was computed. [2020-10-13 04:58:31,027 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 04:58:31,032 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 04:58:31,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 04:58:31 BoogieIcfgContainer [2020-10-13 04:58:31,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 04:58:31,038 INFO L168 Benchmark]: Toolchain (without parser) took 5126.98 ms. Allocated memory was 141.6 MB in the beginning and 277.3 MB in the end (delta: 135.8 MB). Free memory was 104.4 MB in the beginning and 182.7 MB in the end (delta: -78.3 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,039 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.15 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 94.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,041 INFO L168 Benchmark]: Boogie Preprocessor took 111.35 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,041 INFO L168 Benchmark]: RCFGBuilder took 280.27 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 167.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,042 INFO L168 Benchmark]: TraceAbstraction took 4450.49 ms. Allocated memory was 204.5 MB in the beginning and 277.3 MB in the end (delta: 72.9 MB). Free memory was 166.1 MB in the beginning and 182.7 MB in the end (delta: -16.6 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-10-13 04:58:31,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.15 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 94.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.35 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.27 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 167.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4450.49 ms. Allocated memory was 204.5 MB in the beginning and 277.3 MB in the end (delta: 72.9 MB). Free memory was 166.1 MB in the beginning and 182.7 MB in the end (delta: -16.6 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant [2020-10-13 04:58:31,054 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 04:58:31,055 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (main__marker == unknown-#memory_int-unknown[main__a][main__a + main__pos * 4] && 0 <= main__pos) && main__i <= main__pos - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 34 SDslu, 219 SDs, 0 SdLazy, 238 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 12 NumberOfFragments, 44 HoareAnnotationTreeSize, 6 FomulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 8206 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 37/59 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...