/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-crafted/bAnd5.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:29:55,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:29:55,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:29:55,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:29:55,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:29:55,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:29:55,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:29:55,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:29:55,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:29:55,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:29:55,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:29:55,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:29:55,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:29:55,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:29:55,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:29:55,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:29:55,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:29:55,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:29:55,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:29:55,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:29:55,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:29:55,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:29:55,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:29:55,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:29:55,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:29:55,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:29:55,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:29:55,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:29:55,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:29:55,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:29:55,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:29:55,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:29:55,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:29:55,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:29:55,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:29:55,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:29:55,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:29:55,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:29:55,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:29:55,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:29:55,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:29:55,827 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 04:29:55,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:29:55,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:29:55,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:29:55,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:29:55,871 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:29:55,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:29:55,871 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:29:55,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:29:55,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:29:55,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:29:55,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:29:55,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:29:55,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:29:55,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:29:55,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:29:55,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:29:55,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:29:55,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:29:55,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:29:55,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:29:55,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:29:55,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:29:55,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:29:55,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:29:55,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:29:55,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:29:55,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:29:55,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:29:55,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:29:55,877 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 04:29:56,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:29:56,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:29:56,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:29:56,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:29:56,185 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:29:56,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd5.i [2020-10-13 04:29:56,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3cb0f64c/67cf52eb98dd40c6b723bd0d0d593182/FLAGd72e35f9a [2020-10-13 04:29:56,681 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:29:56,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bAnd5.i [2020-10-13 04:29:56,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3cb0f64c/67cf52eb98dd40c6b723bd0d0d593182/FLAGd72e35f9a [2020-10-13 04:29:57,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3cb0f64c/67cf52eb98dd40c6b723bd0d0d593182 [2020-10-13 04:29:57,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:29:57,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:29:57,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:29:57,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:29:57,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:29:57,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57, skipping insertion in model container [2020-10-13 04:29:57,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:29:57,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:29:57,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:29:57,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:29:57,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:29:57,371 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:29:57,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57 WrapperNode [2020-10-13 04:29:57,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:29:57,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:29:57,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:29:57,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:29:57,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (1/1) ... [2020-10-13 04:29:57,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:29:57,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:29:57,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:29:57,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:29:57,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (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 04:29:57,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:29:57,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:29:57,557 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2020-10-13 04:29:57,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:29:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:29:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:29:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2020-10-13 04:29:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:29:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:29:57,822 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:29:57,823 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:29:57,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:29:57 BoogieIcfgContainer [2020-10-13 04:29:57,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:29:57,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:29:57,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:29:57,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:29:57,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:29:57" (1/3) ... [2020-10-13 04:29:57,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ff5780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:29:57, skipping insertion in model container [2020-10-13 04:29:57,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:29:57" (2/3) ... [2020-10-13 04:29:57,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ff5780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:29:57, skipping insertion in model container [2020-10-13 04:29:57,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:29:57" (3/3) ... [2020-10-13 04:29:57,837 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2020-10-13 04:29:57,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:29:57,857 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:29:57,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:29:57,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:29:57,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:29:57,904 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:29:57,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:29:57,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:29:57,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:29:57,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:29:57,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:29:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 04:29:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:29:57,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:57,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:57,934 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1089041636, now seen corresponding path program 1 times [2020-10-13 04:29:57,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:57,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191473921] [2020-10-13 04:29:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:58,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:58,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:58,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:29:59,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:29:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-13 04:29:59,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 04:29:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:29:59,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:59,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:29:59,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:29:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 04:29:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:29:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:29:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:29:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:29:59,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 04:29:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:29:59,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 04:29:59,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:29:59,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:29:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 04:29:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:29:59,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 04:29:59,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:29:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:29:59,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191473921] [2020-10-13 04:29:59,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:29:59,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:29:59,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725708460] [2020-10-13 04:29:59,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:29:59,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:59,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:29:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:29:59,671 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 04:29:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:59,844 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-10-13 04:29:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:29:59,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-13 04:29:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:59,858 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:29:59,858 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:29:59,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 04:29:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:29:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 04:29:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:29:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 04:29:59,917 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2020-10-13 04:29:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:59,917 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 04:29:59,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:29:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 04:29:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:29:59,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:59,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:59,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:29:59,921 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1200270940, now seen corresponding path program 1 times [2020-10-13 04:29:59,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:59,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139797272] [2020-10-13 04:29:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:00,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:00,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:30:00,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:30:00,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-13 04:30:00,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:00,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:30:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:30:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:30:00,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:30:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:00,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:00,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:00,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:30:00,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:30:00,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:00,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 04:30:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:01,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:01,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:01,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:30:01,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:01,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 04:30:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:01,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:30:01,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 04:30:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:01,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:01,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:01,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:30:01,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:01,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:01,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:30:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:30:01,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139797272] [2020-10-13 04:30:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:30:01,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:30:01,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069863991] [2020-10-13 04:30:01,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:30:01,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:30:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:30:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:30:01,046 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2020-10-13 04:30:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:30:01,133 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-13 04:30:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:30:01,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-13 04:30:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:30:01,134 INFO L225 Difference]: With dead ends: 47 [2020-10-13 04:30:01,135 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:30:01,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 04:30:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:30:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 04:30:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:30:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 04:30:01,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 33 [2020-10-13 04:30:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:30:01,144 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 04:30:01,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:30:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 04:30:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:30:01,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:30:01,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:30:01,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:30:01,146 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:30:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:30:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash 592534566, now seen corresponding path program 1 times [2020-10-13 04:30:01,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:30:01,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689724974] [2020-10-13 04:30:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:30:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:01,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:02,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:30:02,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:30:02,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-13 04:30:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:30:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:30:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:30:02,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:30:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:02,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:30:02,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:02,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:30:02,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:02,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:30:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 04:30:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:02,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:02,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:30:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:30:02,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 04:30:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:02,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:02,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:02,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:02,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:30:02,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:02,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:02,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 04:30:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:02,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:02,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:02,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:30:02,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:30:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:30:02,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689724974] [2020-10-13 04:30:02,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:30:02,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:30:02,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401053383] [2020-10-13 04:30:02,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:30:02,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:30:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:30:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:30:02,510 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-13 04:30:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:30:02,621 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 04:30:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:30:02,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-13 04:30:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:30:02,623 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:30:02,623 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:30:02,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 04:30:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:30:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 04:30:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:30:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 04:30:02,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2020-10-13 04:30:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:30:02,633 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 04:30:02,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:30:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 04:30:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:30:02,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:30:02,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:30:02,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:30:02,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:30:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:30:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1196740136, now seen corresponding path program 2 times [2020-10-13 04:30:02,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:30:02,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465492464] [2020-10-13 04:30:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:30:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:03,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:03,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:30:03,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:30:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-13 04:30:03,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:30:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:30:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:30:03,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:03,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:30:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:03,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:03,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:03,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:30:03,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:03,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:30:03,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:03,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:03,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 04:30:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:03,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:04,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:04,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:04,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 04:30:04,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:30:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 04:30:04,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:30:04,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:30:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 04:30:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:04,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:04,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:04,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:30:04,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:04,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:30:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:04,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 04:30:04,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:30:04,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 04:30:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 04:30:04,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465492464] [2020-10-13 04:30:04,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:30:04,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:30:04,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078808302] [2020-10-13 04:30:04,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:30:04,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:30:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:30:04,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:30:04,071 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 04:30:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:30:04,303 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-13 04:30:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:30:04,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-13 04:30:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:30:04,307 INFO L225 Difference]: With dead ends: 49 [2020-10-13 04:30:04,308 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:30:04,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:30:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:30:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 04:30:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:30:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 04:30:04,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2020-10-13 04:30:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:30:04,327 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 04:30:04,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:30:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 04:30:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:30:04,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:30:04,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:30:04,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:30:04,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:30:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:30:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash 476203942, now seen corresponding path program 1 times [2020-10-13 04:30:04,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:30:04,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482607969] [2020-10-13 04:30:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:30:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:04,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:04,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:05,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:05,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:30:05,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:30:05,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-13 04:30:05,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:05,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:30:05,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:30:05,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:30:05,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:30:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:05,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:05,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:05,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:30:05,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:30:05,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 04:30:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:05,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:05,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 04:30:05,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:30:05,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:05,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 04:30:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:05,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:05,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:05,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 04:30:05,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:30:05,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:30:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:30:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:30:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:30:05,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 04:30:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:30:05,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:05,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:05,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 04:30:05,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:05,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 04:30:05,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:30:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 04:30:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:30:05,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:30:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 04:30:05,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482607969] [2020-10-13 04:30:05,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:30:05,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:30:05,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671667161] [2020-10-13 04:30:05,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:30:05,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:30:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:30:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:30:05,679 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-10-13 04:30:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:30:05,898 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-13 04:30:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:30:05,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-13 04:30:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:30:05,900 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:30:05,900 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:30:05,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:30:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:30:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:30:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:30:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:30:05,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2020-10-13 04:30:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:30:05,919 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:30:05,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:30:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:30:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:30:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:30:05,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:30:05,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:30:05,925 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:30:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:30:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -106794812, now seen corresponding path program 1 times [2020-10-13 04:30:05,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:30:05,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23326133] [2020-10-13 04:30:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:30:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 04:30:05,962 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 04:30:05,963 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 04:30:05,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:30:05,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 04:30:05 BoogieIcfgContainer [2020-10-13 04:30:05,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 04:30:06,000 INFO L168 Benchmark]: Toolchain (without parser) took 8891.22 ms. Allocated memory was 139.5 MB in the beginning and 313.5 MB in the end (delta: 174.1 MB). Free memory was 102.2 MB in the beginning and 131.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 144.9 MB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,001 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.87 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,009 INFO L168 Benchmark]: Boogie Preprocessor took 122.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 180.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,010 INFO L168 Benchmark]: RCFGBuilder took 333.48 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,010 INFO L168 Benchmark]: TraceAbstraction took 8166.03 ms. Allocated memory was 202.9 MB in the beginning and 313.5 MB in the end (delta: 110.6 MB). Free memory was 162.0 MB in the beginning and 131.4 MB in the end (delta: 30.7 MB). Peak memory consumption was 141.3 MB. Max. memory is 7.1 GB. [2020-10-13 04:30:06,023 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.87 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 180.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.48 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8166.03 ms. Allocated memory was 202.9 MB in the beginning and 313.5 MB in the end (delta: 110.6 MB). Free memory was 162.0 MB in the beginning and 131.4 MB in the end (delta: 30.7 MB). Peak memory consumption was 141.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 46]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 14. Possible FailurePath: [L6] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND TRUE N > 1 [L23] int x[N]; [L24] int temp; [L25] int ret; [L26] int ret2; [L27] int ret5; [L29] int i = 0; [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ [L29] COND FALSE !(i < N) [L34] CALL, EXPR bAnd(x) [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ [L13] COND FALSE !(i < N) [L16] return res; [L34] RET, EXPR bAnd(x) [L34] ret = bAnd(x) [L36] EXPR x[0] [L36] temp=x[0] [L36] EXPR x[1] [L36] x[0] = x[1] [L36] x[1] = temp [L37] CALL, EXPR bAnd(x) [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ [L13] COND FALSE !(i < N) [L16] return res; [L37] RET, EXPR bAnd(x) [L37] ret2 = bAnd(x) [L38] EXPR x[0] [L38] temp=x[0] [L39] int i =0 ; [L39] COND TRUE i