/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:48:54,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:48:54,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:48:54,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:48:54,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:48:54,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:48:54,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:48:54,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:48:54,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:48:54,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:48:54,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:48:54,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:48:54,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:48:54,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:48:54,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:48:54,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:48:54,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:48:54,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:48:54,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:48:54,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:48:54,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:48:54,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:48:54,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:48:54,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:48:54,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:48:54,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:48:54,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:48:54,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:48:54,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:48:54,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:48:54,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:48:54,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:48:54,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:48:54,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:48:54,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:48:54,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:48:54,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:48:54,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:48:54,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:48:54,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:48:54,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:48:54,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:48:54,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:48:54,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:48:54,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:48:54,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:48:54,661 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:48:54,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:48:54,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:48:54,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:48:54,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:48:54,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:48:54,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:48:54,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:48:54,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:48:54,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:48:54,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:48:54,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:48:54,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:48:54,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:48:54,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:48:54,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:48:54,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:48:54,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:48:54,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:48:54,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:48:54,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:48:54,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:48:54,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:48:54,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:48:54,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:48:54,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:48:55,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:48:55,148 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:48:55,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:48:55,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:48:55,154 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:48:55,156 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-09-24 21:48:55,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd42c951f/e168df0719294e26910e09f8e7b96c28/FLAG0cbdca145 [2020-09-24 21:48:55,745 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:48:55,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condaf.c [2020-09-24 21:48:55,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd42c951f/e168df0719294e26910e09f8e7b96c28/FLAG0cbdca145 [2020-09-24 21:48:56,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd42c951f/e168df0719294e26910e09f8e7b96c28 [2020-09-24 21:48:56,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:48:56,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:48:56,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:56,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:48:56,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:48:56,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44406637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56, skipping insertion in model container [2020-09-24 21:48:56,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:48:56,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:48:56,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:56,401 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:48:56,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:56,449 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:48:56,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56 WrapperNode [2020-09-24 21:48:56,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:56,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:48:56,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:48:56,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:48:56,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... [2020-09-24 21:48:56,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:48:56,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:48:56,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:48:56,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:48:56,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:48:56,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:48:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:48:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:48:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:48:56,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:48:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:48:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:48:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:48:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:48:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:48:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:48:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:48:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:48:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:48:57,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:48:57,139 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 21:48:57,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:57 BoogieIcfgContainer [2020-09-24 21:48:57,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:48:57,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:48:57,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:48:57,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:48:57,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:48:56" (1/3) ... [2020-09-24 21:48:57,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135a4ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:57, skipping insertion in model container [2020-09-24 21:48:57,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:56" (2/3) ... [2020-09-24 21:48:57,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135a4ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:57, skipping insertion in model container [2020-09-24 21:48:57,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:57" (3/3) ... [2020-09-24 21:48:57,155 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-09-24 21:48:57,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:48:57,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:48:57,196 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:48:57,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:48:57,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:48:57,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:48:57,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:48:57,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:48:57,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:48:57,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:48:57,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:48:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-09-24 21:48:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:48:57,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:57,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:57,261 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-09-24 21:48:57,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:57,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593867557] [2020-09-24 21:48:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:48:57,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:48:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-09-24 21:48:57,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 21:48:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:48:57,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:57,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:48:57,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:57,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:48:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:57,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:48:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:48:57,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:48:57,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:57,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593867557] [2020-09-24 21:48:57,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:57,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:48:57,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239329072] [2020-09-24 21:48:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:48:57,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:48:57,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:48:57,943 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-09-24 21:48:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:58,144 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-09-24 21:48:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:48:58,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-24 21:48:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:58,158 INFO L225 Difference]: With dead ends: 125 [2020-09-24 21:48:58,159 INFO L226 Difference]: Without dead ends: 59 [2020-09-24 21:48:58,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:48:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-24 21:48:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-24 21:48:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 21:48:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-24 21:48:58,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-09-24 21:48:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:58,220 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-24 21:48:58,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:48:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-24 21:48:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:48:58,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:58,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:58,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:48:58,223 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-09-24 21:48:58,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:58,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007390758] [2020-09-24 21:48:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:48:59,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:48:59,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-09-24 21:48:59,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:48:59,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:48:59,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:48:59,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:59,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:48:59,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:48:59,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:59,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:48:59,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:48:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:48:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:48:59,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:48:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:48:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:48:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:59,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007390758] [2020-09-24 21:48:59,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:59,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:48:59,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717124634] [2020-09-24 21:48:59,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:48:59,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:48:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:48:59,104 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-09-24 21:48:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:59,321 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-09-24 21:48:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:48:59,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-24 21:48:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:59,323 INFO L225 Difference]: With dead ends: 93 [2020-09-24 21:48:59,324 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 21:48:59,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:48:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 21:48:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-09-24 21:48:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:48:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-09-24 21:48:59,336 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-09-24 21:48:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:59,336 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-09-24 21:48:59,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:48:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-09-24 21:48:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 21:48:59,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:59,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:59,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:48:59,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-09-24 21:48:59,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:59,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086169132] [2020-09-24 21:48:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 21:49:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:49:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:49:04,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:49:04,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:04,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:49:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:04,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 21:49:04,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:04,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:04,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:49:04,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:49:04,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086169132] [2020-09-24 21:49:04,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:04,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:49:04,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594405835] [2020-09-24 21:49:04,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:49:04,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:49:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:49:04,788 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2020-09-24 21:49:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:05,568 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-09-24 21:49:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:49:05,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-09-24 21:49:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:05,571 INFO L225 Difference]: With dead ends: 92 [2020-09-24 21:49:05,571 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 21:49:05,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:49:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 21:49:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-09-24 21:49:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 21:49:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-09-24 21:49:05,581 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 57 [2020-09-24 21:49:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:05,583 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-09-24 21:49:05,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:49:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-09-24 21:49:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 21:49:05,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:05,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:05,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:49:05,585 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1569346213, now seen corresponding path program 1 times [2020-09-24 21:49:05,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:05,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727928722] [2020-09-24 21:49:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:49:05,620 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:49:05,620 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:49:05,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:49:05,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:49:05 BoogieIcfgContainer [2020-09-24 21:49:05,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:49:05,652 INFO L168 Benchmark]: Toolchain (without parser) took 9553.12 ms. Allocated memory was 146.3 MB in the beginning and 272.6 MB in the end (delta: 126.4 MB). Free memory was 103.0 MB in the beginning and 125.6 MB in the end (delta: -22.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,653 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,654 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.13 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,655 INFO L168 Benchmark]: Boogie Preprocessor took 203.56 ms. Allocated memory was 146.3 MB in the beginning and 205.5 MB in the end (delta: 59.2 MB). Free memory was 91.7 MB in the beginning and 183.4 MB in the end (delta: -91.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,656 INFO L168 Benchmark]: RCFGBuilder took 490.26 ms. Allocated memory is still 205.5 MB. Free memory was 183.4 MB in the beginning and 162.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,657 INFO L168 Benchmark]: TraceAbstraction took 8502.06 ms. Allocated memory was 205.5 MB in the beginning and 272.6 MB in the end (delta: 67.1 MB). Free memory was 162.2 MB in the beginning and 125.6 MB in the end (delta: 36.5 MB). Peak memory consumption was 103.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:05,661 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.13 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 203.56 ms. Allocated memory was 146.3 MB in the beginning and 205.5 MB in the end (delta: 59.2 MB). Free memory was 91.7 MB in the beginning and 183.4 MB in the end (delta: -91.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 490.26 ms. Allocated memory is still 205.5 MB. Free memory was 183.4 MB in the beginning and 162.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8502.06 ms. Allocated memory was 205.5 MB in the beginning and 272.6 MB in the end (delta: 67.1 MB). Free memory was 162.2 MB in the beginning and 125.6 MB in the end (delta: 36.5 MB). Peak memory consumption was 103.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i