/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:00:26,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:00:26,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:00:26,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:00:26,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:00:26,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:00:26,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:00:26,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:00:26,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:00:26,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:00:26,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:00:26,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:00:26,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:00:26,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:00:26,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:00:26,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:00:26,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:00:26,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:00:26,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:00:26,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:00:26,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:00:26,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:00:26,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:00:26,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:00:26,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:00:26,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:00:26,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:00:26,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:00:26,682 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 [2020-08-18 18:00:26,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:00:26,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:00:26,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:00:26,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:00:26,736 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:00:26,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:00:26,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:00:26,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:00:26,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:00:26,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:00:26,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:00:26,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:00:26,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:00:26,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:00:26,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:00:26,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:00:26,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:00:26,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:00:26,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:00:26,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:00:26,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:00:26,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:00:26,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:00:26,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:00:26,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:00:26,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:00:26,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:00:26,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:00:26,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:00:26,744 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:00:27,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:00:27,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:00:27,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:00:27,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:00:27,074 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:00:27,074 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-08-18 18:00:27,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa484e477/64a72c40cad44d82aae24f3d7cdc46e5/FLAG461875364 [2020-08-18 18:00:27,603 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:00:27,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-08-18 18:00:27,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa484e477/64a72c40cad44d82aae24f3d7cdc46e5/FLAG461875364 [2020-08-18 18:00:28,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa484e477/64a72c40cad44d82aae24f3d7cdc46e5 [2020-08-18 18:00:28,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:00:28,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:00:28,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:00:28,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:00:28,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:00:28,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436f0f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28, skipping insertion in model container [2020-08-18 18:00:28,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:00:28,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:00:28,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:00:28,378 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:00:28,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:00:28,528 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:00:28,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28 WrapperNode [2020-08-18 18:00:28,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:00:28,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:00:28,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:00:28,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:00:28,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (1/1) ... [2020-08-18 18:00:28,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:00:28,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:00:28,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:00:28,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:00:28,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (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 [2020-08-18 18:00:28,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:00:28,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:00:28,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:00:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-08-18 18:00:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:00:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-08-18 18:00:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:00:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:00:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-08-18 18:00:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-08-18 18:00:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:00:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 18:00:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 18:00:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:00:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:00:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:00:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:00:29,177 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:00:29,177 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-18 18:00:29,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:00:29 BoogieIcfgContainer [2020-08-18 18:00:29,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:00:29,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:00:29,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:00:29,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:00:29,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:00:28" (1/3) ... [2020-08-18 18:00:29,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792091b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:00:29, skipping insertion in model container [2020-08-18 18:00:29,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:28" (2/3) ... [2020-08-18 18:00:29,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792091b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:00:29, skipping insertion in model container [2020-08-18 18:00:29,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:00:29" (3/3) ... [2020-08-18 18:00:29,191 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-08-18 18:00:29,201 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:00:29,209 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:00:29,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:00:29,239 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:00:29,239 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:00:29,240 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:00:29,240 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:00:29,240 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:00:29,240 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:00:29,240 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:00:29,241 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:00:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-18 18:00:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:00:29,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:29,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:29,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-08-18 18:00:29,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:29,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253669291] [2020-08-18 18:00:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:29,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:29,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253669291] [2020-08-18 18:00:29,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:29,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:00:29,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186684777] [2020-08-18 18:00:29,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:00:29,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:00:29,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:00:29,574 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-18 18:00:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:29,846 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-08-18 18:00:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:00:29,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-18 18:00:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:29,859 INFO L225 Difference]: With dead ends: 127 [2020-08-18 18:00:29,859 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 18:00:29,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:00:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 18:00:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-08-18 18:00:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 18:00:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-08-18 18:00:29,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-08-18 18:00:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:29,912 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-08-18 18:00:29,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:00:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-08-18 18:00:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:00:29,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:29,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:29,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:00:29,914 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-08-18 18:00:29,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:29,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428556341] [2020-08-18 18:00:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:30,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428556341] [2020-08-18 18:00:30,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:30,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:00:30,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414826291] [2020-08-18 18:00:30,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:00:30,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:00:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:00:30,090 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-08-18 18:00:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:30,233 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-18 18:00:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:00:30,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-18 18:00:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:30,235 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:00:30,235 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:00:30,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:00:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-08-18 18:00:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:00:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 18:00:30,244 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-08-18 18:00:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:30,244 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 18:00:30,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:00:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 18:00:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:00:30,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:30,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:30,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:00:30,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-08-18 18:00:30,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:30,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177014467] [2020-08-18 18:00:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:30,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177014467] [2020-08-18 18:00:30,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:30,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:00:30,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501775032] [2020-08-18 18:00:30,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:00:30,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:00:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:00:30,401 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-18 18:00:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:30,588 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 18:00:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:00:30,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 18:00:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:30,590 INFO L225 Difference]: With dead ends: 48 [2020-08-18 18:00:30,590 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 18:00:30,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 18:00:30,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-08-18 18:00:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 18:00:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 18:00:30,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-08-18 18:00:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:30,599 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 18:00:30,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:00:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 18:00:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:00:30,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:30,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:30,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:00:30,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-08-18 18:00:30,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:30,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664528191] [2020-08-18 18:00:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 18:00:30,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664528191] [2020-08-18 18:00:30,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:30,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:00:30,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218383421] [2020-08-18 18:00:30,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:00:30,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:00:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:00:30,717 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-18 18:00:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:30,944 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-18 18:00:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:00:30,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-18 18:00:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:30,946 INFO L225 Difference]: With dead ends: 37 [2020-08-18 18:00:30,946 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 18:00:30,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:00:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 18:00:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-08-18 18:00:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 18:00:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 18:00:30,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-08-18 18:00:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:30,956 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 18:00:30,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:00:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 18:00:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 18:00:30,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:30,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:30,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:00:30,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-08-18 18:00:30,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:30,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733714711] [2020-08-18 18:00:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:00:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:00:31,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733714711] [2020-08-18 18:00:31,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:31,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:00:31,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907134220] [2020-08-18 18:00:31,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:00:31,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:00:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:00:31,061 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-08-18 18:00:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:31,235 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-18 18:00:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:00:31,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-18 18:00:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:31,239 INFO L225 Difference]: With dead ends: 66 [2020-08-18 18:00:31,239 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 18:00:31,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:00:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 18:00:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 18:00:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 18:00:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-18 18:00:31,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-08-18 18:00:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:31,250 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-18 18:00:31,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:00:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-18 18:00:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 18:00:31,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:31,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:31,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:00:31,252 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-08-18 18:00:31,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:31,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715718507] [2020-08-18 18:00:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:00:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:00:31,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715718507] [2020-08-18 18:00:31,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:31,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:00:31,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597556835] [2020-08-18 18:00:31,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:31,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:31,359 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-08-18 18:00:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:31,545 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-08-18 18:00:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:00:31,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-08-18 18:00:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:31,547 INFO L225 Difference]: With dead ends: 78 [2020-08-18 18:00:31,547 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 18:00:31,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:00:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 18:00:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 18:00:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 18:00:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-18 18:00:31,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-08-18 18:00:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:31,569 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-18 18:00:31,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-18 18:00:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 18:00:31,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:31,571 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:31,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:00:31,571 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-08-18 18:00:31,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:31,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058229621] [2020-08-18 18:00:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:00:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:00:31,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058229621] [2020-08-18 18:00:31,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:31,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:00:31,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564080237] [2020-08-18 18:00:31,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:00:31,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:31,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:00:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:00:31,727 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-08-18 18:00:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:31,899 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-08-18 18:00:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:00:31,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-18 18:00:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:31,901 INFO L225 Difference]: With dead ends: 90 [2020-08-18 18:00:31,901 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 18:00:31,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:00:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 18:00:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-08-18 18:00:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 18:00:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-08-18 18:00:31,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-08-18 18:00:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:31,916 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-08-18 18:00:31,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:00:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-08-18 18:00:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 18:00:31,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:31,918 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:31,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:00:31,918 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-08-18 18:00:31,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:31,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111214515] [2020-08-18 18:00:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:00:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-18 18:00:32,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111214515] [2020-08-18 18:00:32,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:32,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:00:32,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939677657] [2020-08-18 18:00:32,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:00:32,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:00:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:00:32,048 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2020-08-18 18:00:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:32,259 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-08-18 18:00:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:00:32,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-08-18 18:00:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:32,261 INFO L225 Difference]: With dead ends: 102 [2020-08-18 18:00:32,262 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 18:00:32,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:00:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 18:00:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-18 18:00:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 18:00:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-08-18 18:00:32,271 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-08-18 18:00:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:32,272 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-08-18 18:00:32,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:00:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-08-18 18:00:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:00:32,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:32,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:32,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:00:32,274 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-08-18 18:00:32,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:32,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549276676] [2020-08-18 18:00:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:00:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-18 18:00:32,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549276676] [2020-08-18 18:00:32,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:32,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:00:32,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956375269] [2020-08-18 18:00:32,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:00:32,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:00:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:00:32,419 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-08-18 18:00:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:32,643 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-08-18 18:00:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:00:32,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-08-18 18:00:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:32,649 INFO L225 Difference]: With dead ends: 108 [2020-08-18 18:00:32,649 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 18:00:32,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:00:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 18:00:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 18:00:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 18:00:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-18 18:00:32,669 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-08-18 18:00:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:32,670 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-18 18:00:32,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:00:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-18 18:00:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 18:00:32,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:32,672 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:32,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:00:32,672 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-08-18 18:00:32,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:32,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545403888] [2020-08-18 18:00:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-08-18 18:00:32,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545403888] [2020-08-18 18:00:32,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:32,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:00:32,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204829976] [2020-08-18 18:00:32,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:32,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:32,873 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2020-08-18 18:00:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:33,074 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-08-18 18:00:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:00:33,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 18:00:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:33,076 INFO L225 Difference]: With dead ends: 168 [2020-08-18 18:00:33,077 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 18:00:33,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:00:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 18:00:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-08-18 18:00:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 18:00:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-08-18 18:00:33,088 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-08-18 18:00:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:33,089 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-08-18 18:00:33,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-08-18 18:00:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 18:00:33,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:33,090 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:33,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:00:33,090 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:33,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:33,091 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-08-18 18:00:33,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:33,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376170941] [2020-08-18 18:00:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-08-18 18:00:33,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376170941] [2020-08-18 18:00:33,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:33,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:00:33,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678725023] [2020-08-18 18:00:33,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:33,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:33,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:33,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:33,193 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 7 states. [2020-08-18 18:00:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:33,383 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-08-18 18:00:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:00:33,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 18:00:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:33,385 INFO L225 Difference]: With dead ends: 109 [2020-08-18 18:00:33,385 INFO L226 Difference]: Without dead ends: 107 [2020-08-18 18:00:33,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:00:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-18 18:00:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-08-18 18:00:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 18:00:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-08-18 18:00:33,399 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-08-18 18:00:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:33,399 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-08-18 18:00:33,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-08-18 18:00:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-18 18:00:33,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:33,407 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:33,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:00:33,409 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-08-18 18:00:33,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:33,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788813702] [2020-08-18 18:00:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:00:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-08-18 18:00:33,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788813702] [2020-08-18 18:00:33,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:33,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:00:33,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173419225] [2020-08-18 18:00:33,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:00:33,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:33,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:00:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:00:33,581 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 8 states. [2020-08-18 18:00:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:33,808 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-08-18 18:00:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:00:33,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-08-18 18:00:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:33,810 INFO L225 Difference]: With dead ends: 142 [2020-08-18 18:00:33,810 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 18:00:33,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:00:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 18:00:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-08-18 18:00:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 18:00:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-08-18 18:00:33,834 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 102 [2020-08-18 18:00:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:33,836 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-08-18 18:00:33,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:00:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-08-18 18:00:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 18:00:33,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:33,841 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:33,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:00:33,842 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1572842069, now seen corresponding path program 9 times [2020-08-18 18:00:33,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:33,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725938477] [2020-08-18 18:00:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:00:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:00:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 619 proven. 297 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-08-18 18:00:34,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725938477] [2020-08-18 18:00:34,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:34,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:00:34,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279517510] [2020-08-18 18:00:34,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:00:34,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:00:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:00:34,087 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 9 states. [2020-08-18 18:00:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:34,451 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2020-08-18 18:00:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:00:34,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 18:00:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:34,453 INFO L225 Difference]: With dead ends: 239 [2020-08-18 18:00:34,453 INFO L226 Difference]: Without dead ends: 176 [2020-08-18 18:00:34,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:00:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-08-18 18:00:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-08-18 18:00:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 18:00:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-08-18 18:00:34,464 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-08-18 18:00:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:34,465 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-08-18 18:00:34,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:00:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-08-18 18:00:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 18:00:34,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:34,467 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:34,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:00:34,467 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:34,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 10 times [2020-08-18 18:00:34,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:34,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608540698] [2020-08-18 18:00:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:00:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:00:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-08-18 18:00:34,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608540698] [2020-08-18 18:00:34,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:34,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:00:34,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839841095] [2020-08-18 18:00:34,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:00:34,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:00:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:00:34,633 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 9 states. [2020-08-18 18:00:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:34,861 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2020-08-18 18:00:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:00:34,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 18:00:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:34,863 INFO L225 Difference]: With dead ends: 175 [2020-08-18 18:00:34,864 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 18:00:34,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:00:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 18:00:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-08-18 18:00:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-18 18:00:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-08-18 18:00:34,875 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 135 [2020-08-18 18:00:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:34,876 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-08-18 18:00:34,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:00:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-08-18 18:00:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-18 18:00:34,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:34,878 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:34,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:00:34,878 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 11 times [2020-08-18 18:00:34,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081401621] [2020-08-18 18:00:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:00:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:00:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 18:00:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-08-18 18:00:35,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081401621] [2020-08-18 18:00:35,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:35,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:00:35,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023369125] [2020-08-18 18:00:35,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:00:35,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:00:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:00:35,102 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 10 states. [2020-08-18 18:00:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:35,344 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2020-08-18 18:00:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:00:35,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2020-08-18 18:00:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:35,346 INFO L225 Difference]: With dead ends: 208 [2020-08-18 18:00:35,346 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 18:00:35,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:00:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 18:00:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-08-18 18:00:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 18:00:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-08-18 18:00:35,363 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 168 [2020-08-18 18:00:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:35,364 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-08-18 18:00:35,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:00:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-08-18 18:00:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-18 18:00:35,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:35,367 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 33, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:00:35,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:00:35,367 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash -886069047, now seen corresponding path program 12 times [2020-08-18 18:00:35,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:35,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454328916] [2020-08-18 18:00:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:00:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:00:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:00:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 18:00:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-18 18:00:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-18 18:00:35,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454328916] [2020-08-18 18:00:35,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:35,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:00:35,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390370527] [2020-08-18 18:00:35,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:35,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:35,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:35,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:35,663 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 7 states. [2020-08-18 18:00:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:35,814 INFO L93 Difference]: Finished difference Result 204 states and 240 transitions. [2020-08-18 18:00:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:00:35,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-08-18 18:00:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:35,815 INFO L225 Difference]: With dead ends: 204 [2020-08-18 18:00:35,815 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:00:35,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:00:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:00:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:00:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:00:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:00:35,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-08-18 18:00:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:35,818 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:00:35,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:00:35,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:00:35,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:00:35,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:00:36,018 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-08-18 18:00:36,018 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-08-18 18:00:36,018 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-08-18 18:00:36,018 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-08-18 18:00:36,018 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-08-18 18:00:36,019 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-08-18 18:00:36,019 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-08-18 18:00:36,019 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-08-18 18:00:36,019 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-08-18 18:00:36,019 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-08-18 18:00:36,019 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-08-18 18:00:36,019 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-08-18 18:00:36,019 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-08-18 18:00:36,020 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-08-18 18:00:36,020 INFO L264 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-08-18 18:00:36,020 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-08-18 18:00:36,020 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-08-18 18:00:36,020 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-08-18 18:00:36,020 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-08-18 18:00:36,020 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-08-18 18:00:36,021 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-08-18 18:00:36,022 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-08-18 18:00:36,022 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 18:00:36,022 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-08-18 18:00:36,022 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-08-18 18:00:36,022 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-08-18 18:00:36,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:00:36,022 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#x~0.offset| |old(~#x~0.offset)|) (= |old(#memory_real)| |#memory_real|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-08-18 18:00:36,023 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-08-18 18:00:36,023 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:00:36,024 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:00:36,024 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-08-18 18:00:36,024 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-18 18:00:36,025 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-08-18 18:00:36,025 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-08-18 18:00:36,025 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-08-18 18:00:36,025 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 18:00:36,025 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-08-18 18:00:36,025 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-08-18 18:00:36,025 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-18 18:00:36,026 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-18 18:00:36,026 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 18:00:36,026 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 18:00:36,026 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 18:00:36,026 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 18:00:36,026 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 18:00:36,027 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 18:00:36,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:00:36 BoogieIcfgContainer [2020-08-18 18:00:36,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:00:36,050 INFO L168 Benchmark]: Toolchain (without parser) took 7993.46 ms. Allocated memory was 148.4 MB in the beginning and 329.3 MB in the end (delta: 180.9 MB). Free memory was 104.1 MB in the beginning and 223.6 MB in the end (delta: -119.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,051 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,052 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.75 ms. Allocated memory was 148.4 MB in the beginning and 202.9 MB in the end (delta: 54.5 MB). Free memory was 104.1 MB in the beginning and 179.4 MB in the end (delta: -75.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,052 INFO L168 Benchmark]: Boogie Preprocessor took 55.48 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 176.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,053 INFO L168 Benchmark]: RCFGBuilder took 597.21 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 149.3 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,054 INFO L168 Benchmark]: TraceAbstraction took 6863.82 ms. Allocated memory was 202.9 MB in the beginning and 329.3 MB in the end (delta: 126.4 MB). Free memory was 148.3 MB in the beginning and 223.6 MB in the end (delta: -75.3 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:36,057 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 469.75 ms. Allocated memory was 148.4 MB in the beginning and 202.9 MB in the end (delta: 54.5 MB). Free memory was 104.1 MB in the beginning and 179.4 MB in the end (delta: -75.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.48 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 176.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.21 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 149.3 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6863.82 ms. Allocated memory was 202.9 MB in the beginning and 329.3 MB in the end (delta: 126.4 MB). Free memory was 148.3 MB in the beginning and 223.6 MB in the end (delta: -75.3 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (i <= 5 && n <= 5) && 5 <= n - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: n <= 5 && 5 <= n - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.5s, OverallIterations: 16, TraceHistogramMax: 36, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 467 SDslu, 506 SDs, 0 SdLazy, 1311 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 142 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 65 PreInvPairs, 141 NumberOfFragments, 96 HoareAnnotationTreeSize, 65 FomulaSimplifications, 2732 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1160 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1144 ConstructedInterpolants, 0 QuantifiedInterpolants, 415440 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 4614/9037 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...