/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:53:49,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:53:49,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:53:49,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:53:49,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:53:49,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:53:49,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:53:49,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:53:49,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:53:49,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:53:49,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:53:49,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:53:49,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:53:49,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:53:49,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:53:49,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:53:49,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:53:49,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:53:49,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:53:49,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:53:49,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:53:49,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:53:49,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:53:49,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:53:49,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:53:49,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:53:49,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:53:49,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:53:49,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:53:49,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:53:49,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:53:49,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:53:49,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:53:49,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:53:49,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:53:49,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:53:49,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:53:49,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:53:49,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:53:49,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:53:49,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:53:49,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:53:49,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:53:49,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:53:49,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:53:49,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:53:49,793 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:53:49,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:53:49,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:53:49,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:53:49,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:53:49,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:53:49,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:53:49,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:53:49,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:53:49,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:53:49,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:53:49,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:53:49,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:53:49,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:53:49,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:53:49,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:53:49,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:53:49,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:53:49,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:53:49,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:53:49,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:53:49,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:53:49,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:53:49,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:53:49,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:53:49,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:53:50,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:53:50,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:53:50,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:53:50,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:53:50,285 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:53:50,286 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-25 06:53:50,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56a83bf16/2b0a18e882f34716bd7c72fa947194a9/FLAG0fbb1128e [2020-09-25 06:53:50,883 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:53:50,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-25 06:53:50,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56a83bf16/2b0a18e882f34716bd7c72fa947194a9/FLAG0fbb1128e [2020-09-25 06:53:51,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56a83bf16/2b0a18e882f34716bd7c72fa947194a9 [2020-09-25 06:53:51,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:53:51,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:53:51,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:53:51,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:53:51,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:53:51,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6d7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51, skipping insertion in model container [2020-09-25 06:53:51,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:53:51,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:53:51,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:53:51,571 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:53:51,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:53:51,604 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:53:51,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51 WrapperNode [2020-09-25 06:53:51,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:53:51,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:53:51,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:53:51,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:53:51,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... [2020-09-25 06:53:51,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:53:51,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:53:51,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:53:51,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:53:51,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:53:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:53:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:53:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:53:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:53:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:53:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:53:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:53:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:53:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:53:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:53:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:53:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:53:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:53:52,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:53:52,087 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:53:52,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:53:52 BoogieIcfgContainer [2020-09-25 06:53:52,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:53:52,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:53:52,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:53:52,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:53:52,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:53:51" (1/3) ... [2020-09-25 06:53:52,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7527ffdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:53:52, skipping insertion in model container [2020-09-25 06:53:52,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:51" (2/3) ... [2020-09-25 06:53:52,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7527ffdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:53:52, skipping insertion in model container [2020-09-25 06:53:52,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:53:52" (3/3) ... [2020-09-25 06:53:52,113 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-09-25 06:53:52,122 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:53:52,132 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:53:52,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:53:52,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:53:52,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:53:52,184 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:53:52,185 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:53:52,185 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:53:52,185 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:53:52,185 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:53:52,186 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:53:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-25 06:53:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 06:53:52,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:52,218 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] [2020-09-25 06:53:52,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1686675663, now seen corresponding path program 1 times [2020-09-25 06:53:52,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:52,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770881790] [2020-09-25 06:53:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:52,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 06:53:52,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:53:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-09-25 06:53:52,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:52,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:52,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:53:52,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:52,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:53:52,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:52,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:52,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:52,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:53:52,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:52,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:52,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:52,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:53:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:52,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770881790] [2020-09-25 06:53:52,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:52,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 06:53:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795638499] [2020-09-25 06:53:52,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 06:53:52,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 06:53:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:53:52,766 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2020-09-25 06:53:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:52,798 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-09-25 06:53:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 06:53:52,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-09-25 06:53:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:52,813 INFO L225 Difference]: With dead ends: 57 [2020-09-25 06:53:52,813 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 06:53:52,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:53:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 06:53:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-25 06:53:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 06:53:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-09-25 06:53:52,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 22 [2020-09-25 06:53:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:52,878 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-09-25 06:53:52,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 06:53:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-09-25 06:53:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 06:53:52,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:52,880 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] [2020-09-25 06:53:52,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:53:52,881 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:52,882 INFO L82 PathProgramCache]: Analyzing trace with hash 779060326, now seen corresponding path program 1 times [2020-09-25 06:53:52,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:52,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751140367] [2020-09-25 06:53:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:53,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 06:53:53,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-25 06:53:53,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:53,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:53:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 06:53:53,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 06:53:53,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:53,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:53,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:53,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:53,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:53,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:53,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:53,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751140367] [2020-09-25 06:53:53,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:53,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 06:53:53,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813178187] [2020-09-25 06:53:53,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:53:53,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:53,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:53:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:53:53,310 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-09-25 06:53:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:53,405 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-09-25 06:53:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:53:53,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-25 06:53:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:53,407 INFO L225 Difference]: With dead ends: 49 [2020-09-25 06:53:53,407 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 06:53:53,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:53:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 06:53:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-25 06:53:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-25 06:53:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-25 06:53:53,416 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2020-09-25 06:53:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:53,417 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-25 06:53:53,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:53:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-25 06:53:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 06:53:53,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:53,419 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:53,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:53:53,419 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash -579098768, now seen corresponding path program 1 times [2020-09-25 06:53:53,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:53,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74329015] [2020-09-25 06:53:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:53,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 06:53:53,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:53,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-09-25 06:53:53,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:53,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:53,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:53:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 06:53:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 06:53:53,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:54,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:54,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:54,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:54,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:53:54,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:54,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:54,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:54,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:54,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:54,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74329015] [2020-09-25 06:53:54,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:53:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740931328] [2020-09-25 06:53:54,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:53:54,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:53:54,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:53:54,219 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-09-25 06:53:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:54,484 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-09-25 06:53:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 06:53:54,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-25 06:53:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:54,487 INFO L225 Difference]: With dead ends: 67 [2020-09-25 06:53:54,487 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 06:53:54,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-25 06:53:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 06:53:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-09-25 06:53:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 06:53:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-25 06:53:54,496 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 34 [2020-09-25 06:53:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:54,496 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-25 06:53:54,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:53:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-25 06:53:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 06:53:54,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:54,498 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:54,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:53:54,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash -44019760, now seen corresponding path program 1 times [2020-09-25 06:53:54,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:54,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935531734] [2020-09-25 06:53:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:54,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:54,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 06:53:54,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:53:54,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-25 06:53:54,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:54,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:53:54,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:54,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:54,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:54,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:54,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:54,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:54,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:54,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:54,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 06:53:54,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935531734] [2020-09-25 06:53:54,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:54,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:53:54,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10126935] [2020-09-25 06:53:54,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:53:54,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:53:54,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:54,696 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 3 states. [2020-09-25 06:53:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:54,706 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-09-25 06:53:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:53:54,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-25 06:53:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:54,708 INFO L225 Difference]: With dead ends: 74 [2020-09-25 06:53:54,708 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 06:53:54,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 06:53:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-25 06:53:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 06:53:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 06:53:54,715 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 34 [2020-09-25 06:53:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:54,716 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 06:53:54,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:53:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 06:53:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 06:53:54,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:54,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 06:53:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:53:54,719 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1122436602, now seen corresponding path program 2 times [2020-09-25 06:53:54,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:54,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756434036] [2020-09-25 06:53:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:54,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:55,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 06:53:55,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:55,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-09-25 06:53:55,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:55,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 06:53:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 06:53:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 06:53:55,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:55,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:55,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:55,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:55,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:55,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:55,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:55,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:55,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756434036] [2020-09-25 06:53:55,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:55,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 06:53:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876026505] [2020-09-25 06:53:55,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 06:53:55,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 06:53:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:53:55,736 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-09-25 06:53:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:56,251 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-09-25 06:53:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 06:53:56,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-09-25 06:53:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:56,253 INFO L225 Difference]: With dead ends: 81 [2020-09-25 06:53:56,253 INFO L226 Difference]: Without dead ends: 71 [2020-09-25 06:53:56,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-25 06:53:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-25 06:53:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-09-25 06:53:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 06:53:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 06:53:56,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 44 [2020-09-25 06:53:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:56,261 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 06:53:56,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 06:53:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 06:53:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 06:53:56,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:56,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:56,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:53:56,263 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 937303643, now seen corresponding path program 1 times [2020-09-25 06:53:56,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:56,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265672938] [2020-09-25 06:53:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:56,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:56,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 06:53:56,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:53:56,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-09-25 06:53:56,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:56,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:53:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 06:53:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:53:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:56,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:56,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:56,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:56,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:56,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:56,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:56,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265672938] [2020-09-25 06:53:56,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:56,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:53:56,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652313579] [2020-09-25 06:53:56,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:53:56,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:53:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:56,771 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 3 states. [2020-09-25 06:53:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:56,790 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-09-25 06:53:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:53:56,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-09-25 06:53:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:56,792 INFO L225 Difference]: With dead ends: 70 [2020-09-25 06:53:56,792 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 06:53:56,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 06:53:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-25 06:53:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 06:53:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-25 06:53:56,798 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-09-25 06:53:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:56,798 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-25 06:53:56,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:53:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-25 06:53:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 06:53:56,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:56,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 06:53:56,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:53:56,800 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash -129827524, now seen corresponding path program 1 times [2020-09-25 06:53:56,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:56,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542524575] [2020-09-25 06:53:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:57,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:57,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 06:53:57,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:53:57,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-25 06:53:57,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:57,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:57,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:53:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 06:53:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 06:53:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:57,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:57,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:57,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:57,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:57,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:57,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:57,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:57,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:57,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542524575] [2020-09-25 06:53:57,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:57,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:53:57,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261781697] [2020-09-25 06:53:57,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:53:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:53:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:53:57,179 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 5 states. [2020-09-25 06:53:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:57,209 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-09-25 06:53:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:53:57,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-09-25 06:53:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:57,210 INFO L225 Difference]: With dead ends: 68 [2020-09-25 06:53:57,210 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 06:53:57,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:53:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 06:53:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 06:53:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 06:53:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 06:53:57,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-25 06:53:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:57,213 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 06:53:57,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:53:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 06:53:57,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 06:53:57,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:53:57,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 06:53:57,299 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 06:53:57,299 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:53:57,299 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:53:57,299 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 06:53:57,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 06:53:57,300 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L31-2(line 31) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-09-25 06:53:57,301 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-09-25 06:53:57,302 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 06:53:57,303 INFO L268 CegarLoopResult]: For program point L24-4(lines 13 38) no Hoare annotation was computed. [2020-09-25 06:53:57,303 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 06:53:57,303 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-09-25 06:53:57,303 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-25 06:53:57,303 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-25 06:53:57,304 INFO L268 CegarLoopResult]: For program point L25-2(line 25) no Hoare annotation was computed. [2020-09-25 06:53:57,304 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 06:53:57,304 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-09-25 06:53:57,304 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-09-25 06:53:57,304 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-25 06:53:57,305 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~a~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~b~0 4294967296)) main_~a~0))) (and (<= main_~b~0 main_~a~0) (< .cse0 (+ .cse1 main_~b~0 1)) (<= (+ .cse1 main_~b~0) .cse0))) [2020-09-25 06:53:57,306 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 06:53:57,306 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 06:53:57,307 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 06:53:57,307 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 06:53:57,307 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 06:53:57,307 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 06:53:57,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:53:57 BoogieIcfgContainer [2020-09-25 06:53:57,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:53:57,322 INFO L168 Benchmark]: Toolchain (without parser) took 6068.34 ms. Allocated memory was 139.5 MB in the beginning and 288.9 MB in the end (delta: 149.4 MB). Free memory was 102.7 MB in the beginning and 239.2 MB in the end (delta: -136.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,328 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,331 INFO L168 Benchmark]: Boogie Preprocessor took 108.50 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,332 INFO L168 Benchmark]: RCFGBuilder took 378.49 ms. Allocated memory is still 201.3 MB. Free memory was 180.1 MB in the beginning and 164.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,333 INFO L168 Benchmark]: TraceAbstraction took 5212.44 ms. Allocated memory was 201.3 MB in the beginning and 288.9 MB in the end (delta: 87.6 MB). Free memory was 163.9 MB in the beginning and 239.2 MB in the end (delta: -75.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 06:53:57,347 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.50 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.49 ms. Allocated memory is still 201.3 MB. Free memory was 180.1 MB in the beginning and 164.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5212.44 ms. Allocated memory was 201.3 MB in the beginning and 288.9 MB in the end (delta: 87.6 MB). Free memory was 163.9 MB in the beginning and 239.2 MB in the end (delta: -75.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 272 SDtfs, 150 SDslu, 690 SDs, 0 SdLazy, 307 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 13 PreInvPairs, 17 NumberOfFragments, 40 HoareAnnotationTreeSize, 13 FomulaSimplifications, 23 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 252 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 76142 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 22/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...