/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=DEEPEST --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/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:11:11,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:11:11,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:11:11,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:11:11,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:11:11,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:11:11,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:11:11,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:11:11,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:11:11,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:11:11,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:11:11,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:11:11,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:11:11,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:11:11,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:11:11,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:11:11,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:11:11,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:11:11,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:11:11,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:11:11,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:11:11,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:11:11,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:11:11,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:11:11,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:11:11,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:11:11,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:11:11,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:11:11,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:11:11,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:11:11,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:11:11,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:11:11,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:11:11,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:11:11,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:11:11,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:11:11,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:11:11,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:11:11,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:11:11,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:11:11,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:11:11,751 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 01:11:11,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:11:11,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:11:11,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:11:11,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:11:11,799 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:11:11,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:11:11,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:11:11,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:11:11,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:11:11,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:11:11,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:11:11,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:11:11,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:11:11,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:11:11,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:11:11,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:11:11,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:11:11,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:11:11,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:11:11,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:11:11,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:11:11,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:11:11,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:11:11,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:11:11,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:11:11,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:11:11,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:11:11,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:11:11,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:11:11,806 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:11:12,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:11:12,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:11:12,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:11:12,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:11:12,263 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:11:12,265 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-25 01:11:12,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd589be49/9432f0738848475e82a5720c664d05e3/FLAG1e346d9d7 [2020-09-25 01:11:12,892 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:11:12,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-25 01:11:12,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd589be49/9432f0738848475e82a5720c664d05e3/FLAG1e346d9d7 [2020-09-25 01:11:13,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd589be49/9432f0738848475e82a5720c664d05e3 [2020-09-25 01:11:13,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:11:13,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:11:13,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:11:13,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:11:13,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:11:13,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5790f45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13, skipping insertion in model container [2020-09-25 01:11:13,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:11:13,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:11:13,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:11:13,545 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:11:13,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:11:13,584 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:11:13,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13 WrapperNode [2020-09-25 01:11:13,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:11:13,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:11:13,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:11:13,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:11:13,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (1/1) ... [2020-09-25 01:11:13,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:11:13,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:11:13,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:11:13,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:11:13,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (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 01:11:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:11:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:11:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:11:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:11:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:11:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:11:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:11:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:11:14,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:11:14,018 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:11:14,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:11:14 BoogieIcfgContainer [2020-09-25 01:11:14,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:11:14,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:11:14,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:11:14,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:11:14,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:11:13" (1/3) ... [2020-09-25 01:11:14,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c20a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:11:14, skipping insertion in model container [2020-09-25 01:11:14,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:13" (2/3) ... [2020-09-25 01:11:14,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c20a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:11:14, skipping insertion in model container [2020-09-25 01:11:14,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:11:14" (3/3) ... [2020-09-25 01:11:14,035 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-09-25 01:11:14,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:11:14,062 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:11:14,105 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:11:14,139 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:11:14,140 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:11:14,140 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:11:14,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:11:14,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:11:14,140 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:11:14,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:11:14,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:11:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 01:11:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 01:11:14,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:14,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:14,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-09-25 01:11:14,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:14,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548120294] [2020-09-25 01:11:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:14,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:14,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 01:11:14,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:14,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-25 01:11:14,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 01:11:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 01:11:14,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:14,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:14,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:11:14,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:14,482 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 01:11:14,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548120294] [2020-09-25 01:11:14,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:14,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:11:14,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057398788] [2020-09-25 01:11:14,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:11:14,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:11:14,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:11:14,517 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 01:11:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:14,546 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-09-25 01:11:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:11:14,547 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 01:11:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:14,560 INFO L225 Difference]: With dead ends: 42 [2020-09-25 01:11:14,560 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 01:11:14,565 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 01:11:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 01:11:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-25 01:11:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:11:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-25 01:11:14,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-09-25 01:11:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:14,616 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-25 01:11:14,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:11:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-25 01:11:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 01:11:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:14,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:14,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:11:14,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 993822854, now seen corresponding path program 1 times [2020-09-25 01:11:14,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:14,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134196267] [2020-09-25 01:11:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:14,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:14,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 01:11:14,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 01:11:14,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:11:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 01:11:14,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:14,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:14,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:14,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:14,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:14,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:14,873 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 01:11:14,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134196267] [2020-09-25 01:11:14,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:14,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:11:14,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696231389] [2020-09-25 01:11:14,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:11:14,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:14,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:11:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:11:14,878 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-09-25 01:11:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:14,942 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-25 01:11:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:11:14,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 01:11:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:14,944 INFO L225 Difference]: With dead ends: 39 [2020-09-25 01:11:14,944 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 01:11:14,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 01:11:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 01:11:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 01:11:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-25 01:11:14,956 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-09-25 01:11:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:14,956 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-25 01:11:14,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:11:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-25 01:11:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 01:11:14,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:14,958 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:14,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:11:14,958 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1988212296, now seen corresponding path program 1 times [2020-09-25 01:11:14,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:14,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778633230] [2020-09-25 01:11:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 01:11:15,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:15,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-09-25 01:11:15,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:11:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 01:11:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:15,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:15,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:15,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:15,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 01:11:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:11:15,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 01:11:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:11:15,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:15,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 01:11:15,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:15,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778633230] [2020-09-25 01:11:15,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:15,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:11:15,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766035376] [2020-09-25 01:11:15,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:11:15,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:11:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:11:15,260 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2020-09-25 01:11:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:15,297 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-25 01:11:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:11:15,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-25 01:11:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:15,299 INFO L225 Difference]: With dead ends: 43 [2020-09-25 01:11:15,299 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 01:11:15,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 01:11:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-09-25 01:11:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-25 01:11:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-25 01:11:15,306 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-09-25 01:11:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:15,307 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-25 01:11:15,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:11:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-25 01:11:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 01:11:15,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:15,309 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] [2020-09-25 01:11:15,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:11:15,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-09-25 01:11:15,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:15,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600097999] [2020-09-25 01:11:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 01:11:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 01:11:15,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:11:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 01:11:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 01:11:15,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-09-25 01:11:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:15,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:15,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600097999] [2020-09-25 01:11:15,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:15,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 01:11:15,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446427523] [2020-09-25 01:11:15,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:11:15,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:11:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:11:15,620 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-09-25 01:11:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:15,742 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-09-25 01:11:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 01:11:15,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-25 01:11:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:15,744 INFO L225 Difference]: With dead ends: 45 [2020-09-25 01:11:15,744 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 01:11:15,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:11:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 01:11:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-09-25 01:11:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 01:11:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 01:11:15,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2020-09-25 01:11:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:15,754 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 01:11:15,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:11:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 01:11:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 01:11:15,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:15,756 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] [2020-09-25 01:11:15,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:11:15,756 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1649594383, now seen corresponding path program 1 times [2020-09-25 01:11:15,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:15,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701832278] [2020-09-25 01:11:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 01:11:15,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:15,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-25 01:11:15,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 01:11:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 01:11:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 01:11:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:15,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:15,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:15,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:15,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-25 01:11:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:15,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:15,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:11:15,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:15,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 01:11:15,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:15,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:11:15,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 01:11:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:15,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701832278] [2020-09-25 01:11:15,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:15,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 01:11:15,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983026315] [2020-09-25 01:11:15,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:11:15,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:11:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:15,995 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-09-25 01:11:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:16,070 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-25 01:11:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 01:11:16,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-25 01:11:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:16,072 INFO L225 Difference]: With dead ends: 44 [2020-09-25 01:11:16,072 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 01:11:16,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:11:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 01:11:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 01:11:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 01:11:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 01:11:16,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-09-25 01:11:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:16,079 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 01:11:16,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:11:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 01:11:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 01:11:16,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:16,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:16,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:11:16,080 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -562773644, now seen corresponding path program 1 times [2020-09-25 01:11:16,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:16,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219572988] [2020-09-25 01:11:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:16,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 01:11:16,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:16,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 01:11:16,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:16,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 01:11:16,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:16,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 01:11:16,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:16,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:16,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:16,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:16,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:16,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:16,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:16,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:16,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 01:11:16,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219572988] [2020-09-25 01:11:16,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:16,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:11:16,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635874256] [2020-09-25 01:11:16,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:11:16,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:11:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:16,212 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-09-25 01:11:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:16,253 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-09-25 01:11:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:11:16,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-25 01:11:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:16,253 INFO L225 Difference]: With dead ends: 28 [2020-09-25 01:11:16,254 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 01:11:16,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:11:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 01:11:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 01:11:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 01:11:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 01:11:16,255 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-09-25 01:11:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:16,255 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 01:11:16,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:11:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 01:11:16,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 01:11:16,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:11:16,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 01:11:16,383 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 01:11:16,383 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:11:16,383 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:11:16,383 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 01:11:16,384 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 01:11:16,384 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:16,385 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-09-25 01:11:16,385 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) [2020-09-25 01:11:16,385 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 01:11:16,385 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 01:11:16,385 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0))) [2020-09-25 01:11:16,386 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse2 (<= 0 main_~m~0)) (.cse1 (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)))) (or (let ((.cse0 (+ main_~m~0 1))) (and (<= main_~x~0 .cse0) .cse1 (<= main_~n~0 .cse0))) (and .cse2 (<= main_~m~0 0)) (and .cse2 (<= 0 main_~x~0) .cse1))) [2020-09-25 01:11:16,386 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-09-25 01:11:16,386 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-25 01:11:16,386 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L18-2(line 18) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 01:11:16,387 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed. [2020-09-25 01:11:16,388 INFO L268 CegarLoopResult]: For program point L18-5(lines 18 20) no Hoare annotation was computed. [2020-09-25 01:11:16,388 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 01:11:16,388 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 01:11:16,388 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 01:11:16,388 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 01:11:16,388 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 01:11:16,389 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 01:11:16,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:11:16 BoogieIcfgContainer [2020-09-25 01:11:16,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:11:16,415 INFO L168 Benchmark]: Toolchain (without parser) took 3142.73 ms. Allocated memory was 141.0 MB in the beginning and 233.8 MB in the end (delta: 92.8 MB). Free memory was 104.7 MB in the beginning and 118.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 78.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:16,416 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 01:11:16,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.63 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:16,418 INFO L168 Benchmark]: Boogie Preprocessor took 115.62 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 182.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:16,419 INFO L168 Benchmark]: RCFGBuilder took 321.23 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 170.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:16,420 INFO L168 Benchmark]: TraceAbstraction took 2386.34 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 169.4 MB in the beginning and 118.7 MB in the end (delta: 50.7 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:16,424 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.63 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.62 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 182.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.23 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 170.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2386.34 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 169.4 MB in the beginning and 118.7 MB in the end (delta: 50.7 MB). Peak memory consumption was 80.6 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= m && 0 <= x) && (n <= 0 || m < n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 155 SDtfs, 60 SDslu, 374 SDs, 0 SdLazy, 125 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, 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, 6 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 66 HoareAnnotationTreeSize, 14 FomulaSimplifications, 19 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 5027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 8/12 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...