/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:21:12,116 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 02:21:12,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:21:12,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:21:12,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:21:12,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:21:12,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:21:12,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:21:12,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:21:12,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:21:12,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:21:12,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:21:12,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:21:12,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:21:12,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:21:12,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:21:12,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:21:12,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:21:12,197 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 [2020-08-22 02:21:12,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:21:12,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:21:12,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:21:12,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:21:12,256 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:21:12,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:21:12,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:21:12,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:21:12,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:21:12,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:21:12,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:21:12,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:21:12,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:21:12,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:21:12,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:21:12,260 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:21:12,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:21:12,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:21:12,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:21:12,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:21:12,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:21:12,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:21:12,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:21:12,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:21:12,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:21:12,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:21:12,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:21:12,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:21:12,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:21:12,265 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:21:12,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:21:12,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:21:12,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:21:12,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:21:12,617 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:21:12,618 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 02:21:12,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baf3f88e9/a9774bbadda6456488b38603e395e02b/FLAG9fee93c00 [2020-08-22 02:21:13,129 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:21:13,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 02:21:13,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baf3f88e9/a9774bbadda6456488b38603e395e02b/FLAG9fee93c00 [2020-08-22 02:21:13,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baf3f88e9/a9774bbadda6456488b38603e395e02b [2020-08-22 02:21:13,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:21:13,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:21:13,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:21:13,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:21:13,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:21:13,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4137acd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13, skipping insertion in model container [2020-08-22 02:21:13,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:21:13,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:21:13,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:21:13,759 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:21:13,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:21:13,791 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:21:13,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13 WrapperNode [2020-08-22 02:21:13,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:21:13,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:21:13,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:21:13,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:21:13,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (1/1) ... [2020-08-22 02:21:13,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:21:13,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:21:13,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:21:13,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:21:13,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (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 [2020-08-22 02:21:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:21:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:21:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 02:21:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:21:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:21:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 02:21:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 02:21:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:21:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:21:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:21:14,167 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:21:14,167 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:21:14,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:21:14 BoogieIcfgContainer [2020-08-22 02:21:14,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:21:14,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:21:14,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:21:14,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:21:14,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:21:13" (1/3) ... [2020-08-22 02:21:14,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a4261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:21:14, skipping insertion in model container [2020-08-22 02:21:14,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:21:13" (2/3) ... [2020-08-22 02:21:14,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a4261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:21:14, skipping insertion in model container [2020-08-22 02:21:14,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:21:14" (3/3) ... [2020-08-22 02:21:14,195 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-22 02:21:14,217 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:21:14,240 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:21:14,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:21:14,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:21:14,311 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:21:14,311 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:21:14,311 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:21:14,311 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:21:14,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:21:14,312 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:21:14,312 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:21:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 02:21:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 02:21:14,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:14,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:14,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-22 02:21:14,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:14,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639525186] [2020-08-22 02:21:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:14,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:14,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639525186] [2020-08-22 02:21:14,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:14,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 02:21:14,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235843855] [2020-08-22 02:21:14,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 02:21:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 02:21:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 02:21:14,500 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-22 02:21:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:14,518 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-22 02:21:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 02:21:14,519 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 02:21:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:14,526 INFO L225 Difference]: With dead ends: 31 [2020-08-22 02:21:14,526 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 02:21:14,529 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 [2020-08-22 02:21:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 02:21:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 02:21:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 02:21:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-22 02:21:14,564 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-22 02:21:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:14,564 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-22 02:21:14,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 02:21:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-22 02:21:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 02:21:14,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:14,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:14,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:21:14,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-22 02:21:14,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:14,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074868165] [2020-08-22 02:21:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:14,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:14,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074868165] [2020-08-22 02:21:14,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:14,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:21:14,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621750207] [2020-08-22 02:21:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:21:14,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:21:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:21:14,670 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-22 02:21:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:14,723 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-22 02:21:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:21:14,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 02:21:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:14,725 INFO L225 Difference]: With dead ends: 23 [2020-08-22 02:21:14,725 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 02:21:14,726 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 [2020-08-22 02:21:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 02:21:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 02:21:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 02:21:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 02:21:14,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-22 02:21:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:14,732 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 02:21:14,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:21:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 02:21:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:21:14,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:14,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:14,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:21:14,734 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:14,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-22 02:21:14,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:14,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161231564] [2020-08-22 02:21:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:15,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161231564] [2020-08-22 02:21:15,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:15,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:21:15,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711487554] [2020-08-22 02:21:15,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:21:15,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:21:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:21:15,044 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-22 02:21:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:15,161 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 02:21:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:21:15,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-22 02:21:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:15,165 INFO L225 Difference]: With dead ends: 33 [2020-08-22 02:21:15,165 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 02:21:15,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:21:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 02:21:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-22 02:21:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 02:21:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-22 02:21:15,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-22 02:21:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:15,175 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-22 02:21:15,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:21:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-22 02:21:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:21:15,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:15,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:15,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:21:15,177 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-22 02:21:15,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:15,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851581436] [2020-08-22 02:21:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 02:21:15,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851581436] [2020-08-22 02:21:15,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:15,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:21:15,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704939183] [2020-08-22 02:21:15,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:21:15,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:21:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:21:15,214 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-22 02:21:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:15,237 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 02:21:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:21:15,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 02:21:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:15,239 INFO L225 Difference]: With dead ends: 32 [2020-08-22 02:21:15,239 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 02:21:15,240 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 [2020-08-22 02:21:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 02:21:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 02:21:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 02:21:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-22 02:21:15,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-22 02:21:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:15,246 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-22 02:21:15,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:21:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-22 02:21:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:21:15,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:15,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:15,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:21:15,248 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-22 02:21:15,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:15,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429923859] [2020-08-22 02:21:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:15,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429923859] [2020-08-22 02:21:15,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:15,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 02:21:15,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184286891] [2020-08-22 02:21:15,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:21:15,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:21:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:21:15,306 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-22 02:21:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:15,368 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 02:21:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:21:15,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 02:21:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:15,370 INFO L225 Difference]: With dead ends: 30 [2020-08-22 02:21:15,370 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 02:21:15,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:21:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 02:21:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-22 02:21:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 02:21:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 02:21:15,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-22 02:21:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:15,384 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 02:21:15,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:21:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 02:21:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:21:15,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:15,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:15,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:21:15,386 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-22 02:21:15,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:15,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236458344] [2020-08-22 02:21:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:21:15,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236458344] [2020-08-22 02:21:15,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:15,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:21:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944389967] [2020-08-22 02:21:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:21:15,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:21:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:21:15,639 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-22 02:21:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:15,825 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-22 02:21:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:21:15,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-22 02:21:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:15,826 INFO L225 Difference]: With dead ends: 31 [2020-08-22 02:21:15,827 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 02:21:15,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:21:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 02:21:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-22 02:21:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 02:21:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 02:21:15,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-22 02:21:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:15,834 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 02:21:15,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:21:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 02:21:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:21:15,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:15,835 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:15,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:21:15,836 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-22 02:21:15,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:15,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546896471] [2020-08-22 02:21:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:15,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546896471] [2020-08-22 02:21:15,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:15,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:21:15,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753117469] [2020-08-22 02:21:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:21:15,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:21:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:21:15,911 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-22 02:21:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:15,963 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-22 02:21:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:21:15,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 02:21:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:15,965 INFO L225 Difference]: With dead ends: 38 [2020-08-22 02:21:15,965 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 02:21:15,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:21:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 02:21:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-22 02:21:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 02:21:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-22 02:21:15,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-22 02:21:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:15,972 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-22 02:21:15,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:21:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-22 02:21:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:21:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:15,974 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:15,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:21:15,975 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-22 02:21:15,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:15,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820818469] [2020-08-22 02:21:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820818469] [2020-08-22 02:21:16,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:21:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933850138] [2020-08-22 02:21:16,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:21:16,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:21:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:21:16,084 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-22 02:21:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:16,163 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-22 02:21:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:21:16,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 02:21:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:16,166 INFO L225 Difference]: With dead ends: 42 [2020-08-22 02:21:16,166 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 02:21:16,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:21:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 02:21:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 02:21:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 02:21:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 02:21:16,178 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-22 02:21:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:16,181 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 02:21:16,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:21:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 02:21:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:21:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:16,184 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:16,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:21:16,184 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-22 02:21:16,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:16,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178748226] [2020-08-22 02:21:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:16,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178748226] [2020-08-22 02:21:16,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:16,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:21:16,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222626474] [2020-08-22 02:21:16,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:21:16,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:21:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:21:16,332 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-22 02:21:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:16,399 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 02:21:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:21:16,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 02:21:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:16,401 INFO L225 Difference]: With dead ends: 46 [2020-08-22 02:21:16,401 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 02:21:16,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:21:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 02:21:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-22 02:21:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 02:21:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 02:21:16,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-22 02:21:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:16,409 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 02:21:16,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:21:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 02:21:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 02:21:16,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:16,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:16,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:21:16,411 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-22 02:21:16,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:16,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224388650] [2020-08-22 02:21:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:21:16,431 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:21:16,432 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:21:16,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:21:16,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:21:16 BoogieIcfgContainer [2020-08-22 02:21:16,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:21:16,458 INFO L168 Benchmark]: Toolchain (without parser) took 2933.10 ms. Allocated memory was 145.2 MB in the beginning and 230.7 MB in the end (delta: 85.5 MB). Free memory was 101.9 MB in the beginning and 95.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 92.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:16,459 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:21:16,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.05 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:16,460 INFO L168 Benchmark]: Boogie Preprocessor took 121.80 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 179.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:16,465 INFO L168 Benchmark]: RCFGBuilder took 256.52 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 166.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:16,466 INFO L168 Benchmark]: TraceAbstraction took 2282.57 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 165.9 MB in the beginning and 95.3 MB in the end (delta: 70.6 MB). Peak memory consumption was 100.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:16,477 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.05 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.80 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 179.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.52 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 166.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2282.57 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 165.9 MB in the beginning and 95.3 MB in the end (delta: 70.6 MB). Peak memory consumption was 100.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i