/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=SHALLOWEST -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 20:25:19,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:25:19,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:25:19,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:25:19,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:25:19,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:25:19,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:25:19,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:25:19,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:25:19,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:25:19,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:25:19,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:25:19,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:25:19,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:25:19,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:25:19,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:25:19,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:25:19,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:25:19,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:25:19,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:25:19,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:25:19,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:25:19,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:25:19,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:25:19,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:25:19,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:25:19,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:25:19,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:25:19,443 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 20:25:19,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:25:19,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:25:19,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:25:19,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:25:19,468 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:25:19,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:25:19,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:25:19,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:25:19,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:25:19,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:25:19,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:25:19,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:25:19,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:25:19,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:25:19,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:25:19,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:25:19,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:25:19,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:25:19,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:25:19,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:25:19,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:25:19,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:25:19,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:25:19,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:25:19,473 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:25:19,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:25:19,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:25:19,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:25:19,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:25:19,817 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:25:19,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-08-18 20:25:19,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e006d82/c0ccc284ea754e0d99dbf2039246310e/FLAG42109048c [2020-08-18 20:25:20,397 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:25:20,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-08-18 20:25:20,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e006d82/c0ccc284ea754e0d99dbf2039246310e/FLAG42109048c [2020-08-18 20:25:20,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e006d82/c0ccc284ea754e0d99dbf2039246310e [2020-08-18 20:25:20,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:25:20,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:25:20,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:25:20,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:25:20,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:25:20,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:25:20" (1/1) ... [2020-08-18 20:25:20,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394dfe3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:20, skipping insertion in model container [2020-08-18 20:25:20,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:25:20" (1/1) ... [2020-08-18 20:25:20,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:25:20,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:25:21,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:25:21,071 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:25:21,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:25:21,211 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:25:21,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21 WrapperNode [2020-08-18 20:25:21,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:25:21,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:25:21,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:25:21,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:25:21,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (1/1) ... [2020-08-18 20:25:21,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:25:21,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:25:21,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:25:21,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:25:21,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (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 20:25:21,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:25:21,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:25:21,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 20:25:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-08-18 20:25:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:25:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-08-18 20:25:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:25:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 20:25:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-08-18 20:25:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:25:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:25:21,784 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:25:21,784 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-18 20:25:21,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:25:21 BoogieIcfgContainer [2020-08-18 20:25:21,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:25:21,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:25:21,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:25:21,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:25:21,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:25:20" (1/3) ... [2020-08-18 20:25:21,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5481062d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:25:21, skipping insertion in model container [2020-08-18 20:25:21,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:21" (2/3) ... [2020-08-18 20:25:21,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5481062d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:25:21, skipping insertion in model container [2020-08-18 20:25:21,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:25:21" (3/3) ... [2020-08-18 20:25:21,805 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-08-18 20:25:21,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:25:21,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:25:21,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:25:21,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:25:21,861 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:25:21,861 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:25:21,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:25:21,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:25:21,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:25:21,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:25:21,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:25:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-18 20:25:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 20:25:21,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:21,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:25:21,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-08-18 20:25:21,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:21,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210535271] [2020-08-18 20:25:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,207 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 20:25:22,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210535271] [2020-08-18 20:25:22,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:25:22,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:25:22,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428611534] [2020-08-18 20:25:22,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:25:22,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:25:22,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:25:22,236 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-18 20:25:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:22,467 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-08-18 20:25:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:25:22,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-18 20:25:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:22,481 INFO L225 Difference]: With dead ends: 127 [2020-08-18 20:25:22,481 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 20:25:22,486 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 20:25:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 20:25:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-08-18 20:25:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 20:25:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-08-18 20:25:22,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-08-18 20:25:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:22,536 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-08-18 20:25:22,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:25:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-08-18 20:25:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 20:25:22,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:22,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:25:22,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:25:22,539 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:22,540 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-08-18 20:25:22,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:22,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517381515] [2020-08-18 20:25:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,698 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 20:25:22,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517381515] [2020-08-18 20:25:22,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:25:22,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:25:22,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981068604] [2020-08-18 20:25:22,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:25:22,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:25:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:25:22,702 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-08-18 20:25:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:22,885 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-18 20:25:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:25:22,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-18 20:25:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:22,887 INFO L225 Difference]: With dead ends: 40 [2020-08-18 20:25:22,887 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 20:25:22,888 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 20:25:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 20:25:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-08-18 20:25:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 20:25:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 20:25:22,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-08-18 20:25:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:22,896 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 20:25:22,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:25:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 20:25:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 20:25:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:22,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:25:22,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:25:22,898 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-08-18 20:25:22,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:22,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655221273] [2020-08-18 20:25:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:22,988 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 20:25:22,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655221273] [2020-08-18 20:25:22,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:25:22,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:25:22,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576927925] [2020-08-18 20:25:22,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:25:22,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:25:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:25:22,991 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-18 20:25:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:23,139 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 20:25:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:25:23,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 20:25:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:23,141 INFO L225 Difference]: With dead ends: 48 [2020-08-18 20:25:23,141 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 20:25:23,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:25:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 20:25:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-08-18 20:25:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 20:25:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 20:25:23,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-08-18 20:25:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:23,150 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 20:25:23,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:25:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 20:25:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 20:25:23,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:23,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:25:23,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:25:23,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-08-18 20:25:23,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:23,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317052678] [2020-08-18 20:25:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,274 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 20:25:23,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317052678] [2020-08-18 20:25:23,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:25:23,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:25:23,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707715989] [2020-08-18 20:25:23,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:25:23,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:25:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:25:23,282 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-18 20:25:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:23,520 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-18 20:25:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:25:23,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-18 20:25:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:23,522 INFO L225 Difference]: With dead ends: 37 [2020-08-18 20:25:23,522 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 20:25:23,523 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 20:25:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 20:25:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-08-18 20:25:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 20:25:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 20:25:23,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-08-18 20:25:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:23,532 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 20:25:23,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:25:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 20:25:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 20:25:23,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:23,533 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 20:25:23,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:25:23,534 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-08-18 20:25:23,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:23,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224870803] [2020-08-18 20:25:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:25:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,634 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 20:25:23,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224870803] [2020-08-18 20:25:23,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:23,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:25:23,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218807793] [2020-08-18 20:25:23,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:25:23,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:25:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:25:23,637 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-08-18 20:25:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:23,805 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-18 20:25:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:25:23,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-18 20:25:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:23,809 INFO L225 Difference]: With dead ends: 66 [2020-08-18 20:25:23,809 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 20:25:23,810 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 20:25:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 20:25:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 20:25:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 20:25:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-18 20:25:23,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-08-18 20:25:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:23,819 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-18 20:25:23,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:25:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-18 20:25:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 20:25:23,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:23,821 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 20:25:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:25:23,821 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-08-18 20:25:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953740415] [2020-08-18 20:25:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:25:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:23,919 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 20:25:23,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953740415] [2020-08-18 20:25:23,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:23,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:25:23,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771401772] [2020-08-18 20:25:23,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:25:23,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:25:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:25:23,922 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-08-18 20:25:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:24,110 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-08-18 20:25:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:25:24,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-08-18 20:25:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:24,112 INFO L225 Difference]: With dead ends: 78 [2020-08-18 20:25:24,112 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 20:25:24,118 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 20:25:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 20:25:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 20:25:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 20:25:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-18 20:25:24,130 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-08-18 20:25:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:24,131 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-18 20:25:24,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:25:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-18 20:25:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 20:25:24,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:24,134 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 20:25:24,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:25:24,135 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-08-18 20:25:24,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:24,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432594588] [2020-08-18 20:25:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 20:25:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,281 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 20:25:24,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432594588] [2020-08-18 20:25:24,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:24,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:25:24,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786492759] [2020-08-18 20:25:24,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:25:24,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:25:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:25:24,283 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-08-18 20:25:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:24,444 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-08-18 20:25:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:25:24,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-18 20:25:24,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:24,446 INFO L225 Difference]: With dead ends: 90 [2020-08-18 20:25:24,446 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 20:25:24,446 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 20:25:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 20:25:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-08-18 20:25:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 20:25:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-08-18 20:25:24,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-08-18 20:25:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:24,460 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-08-18 20:25:24,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:25:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-08-18 20:25:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 20:25:24,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:24,462 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 20:25:24,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:25:24,463 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-08-18 20:25:24,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:24,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400868250] [2020-08-18 20:25:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 20:25:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,575 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 20:25:24,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400868250] [2020-08-18 20:25:24,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:24,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 20:25:24,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404283036] [2020-08-18 20:25:24,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:25:24,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:25:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:25:24,577 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2020-08-18 20:25:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:24,827 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-08-18 20:25:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:25:24,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-08-18 20:25:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:24,829 INFO L225 Difference]: With dead ends: 102 [2020-08-18 20:25:24,829 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 20:25:24,830 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 20:25:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 20:25:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-18 20:25:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 20:25:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-08-18 20:25:24,839 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-08-18 20:25:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:24,839 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-08-18 20:25:24,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:25:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-08-18 20:25:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:25:24,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:24,841 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 20:25:24,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:25:24,842 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-08-18 20:25:24,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:24,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971878972] [2020-08-18 20:25:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:25:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:24,975 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 20:25:24,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971878972] [2020-08-18 20:25:24,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:24,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:25:24,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864353391] [2020-08-18 20:25:24,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:25:24,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:25:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:25:24,978 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-08-18 20:25:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:25,196 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-08-18 20:25:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:25:25,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-08-18 20:25:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:25,197 INFO L225 Difference]: With dead ends: 108 [2020-08-18 20:25:25,198 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 20:25:25,198 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 20:25:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 20:25:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 20:25:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 20:25:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-18 20:25:25,207 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-08-18 20:25:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:25,207 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-18 20:25:25,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:25:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-18 20:25:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 20:25:25,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:25,209 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 20:25:25,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:25:25,210 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-08-18 20:25:25,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:25,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527849898] [2020-08-18 20:25:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,334 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 20:25:25,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527849898] [2020-08-18 20:25:25,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:25,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:25:25,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905807490] [2020-08-18 20:25:25,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:25:25,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:25:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:25:25,337 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2020-08-18 20:25:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:25,534 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-08-18 20:25:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:25:25,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 20:25:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:25,536 INFO L225 Difference]: With dead ends: 168 [2020-08-18 20:25:25,536 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 20:25:25,537 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 20:25:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 20:25:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-08-18 20:25:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 20:25:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-08-18 20:25:25,552 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-08-18 20:25:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:25,552 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-08-18 20:25:25,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:25:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-08-18 20:25:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 20:25:25,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:25,554 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 20:25:25,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:25:25,554 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-08-18 20:25:25,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:25,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86469790] [2020-08-18 20:25:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,659 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 20:25:25,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86469790] [2020-08-18 20:25:25,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:25,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:25:25,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589303959] [2020-08-18 20:25:25,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:25:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:25:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:25:25,661 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 7 states. [2020-08-18 20:25:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:25,868 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-08-18 20:25:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:25:25,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 20:25:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:25,872 INFO L225 Difference]: With dead ends: 109 [2020-08-18 20:25:25,872 INFO L226 Difference]: Without dead ends: 107 [2020-08-18 20:25:25,873 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 20:25:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-18 20:25:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-08-18 20:25:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 20:25:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-08-18 20:25:25,884 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-08-18 20:25:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:25,884 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-08-18 20:25:25,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:25:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-08-18 20:25:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-18 20:25:25,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:25,886 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 20:25:25,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:25:25,887 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-08-18 20:25:25,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:25,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768923502] [2020-08-18 20:25:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:25,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:25:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,020 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 20:25:26,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768923502] [2020-08-18 20:25:26,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:26,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:25:26,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935097213] [2020-08-18 20:25:26,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:25:26,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:26,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:25:26,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:25:26,022 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 8 states. [2020-08-18 20:25:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:26,270 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-08-18 20:25:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:25:26,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-08-18 20:25:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:26,272 INFO L225 Difference]: With dead ends: 142 [2020-08-18 20:25:26,272 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 20:25:26,273 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 20:25:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 20:25:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-08-18 20:25:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 20:25:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-08-18 20:25:26,285 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 102 [2020-08-18 20:25:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:26,285 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-08-18 20:25:26,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:25:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-08-18 20:25:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 20:25:26,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:26,290 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 20:25:26,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:25:26,290 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1572842069, now seen corresponding path program 9 times [2020-08-18 20:25:26,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:26,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116886924] [2020-08-18 20:25:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:25:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 20:25:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:26,503 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 20:25:26,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116886924] [2020-08-18 20:25:26,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:26,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 20:25:26,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258738096] [2020-08-18 20:25:26,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:25:26,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:25:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:25:26,505 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 9 states. [2020-08-18 20:25:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:26,881 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2020-08-18 20:25:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 20:25:26,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 20:25:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:26,883 INFO L225 Difference]: With dead ends: 239 [2020-08-18 20:25:26,884 INFO L226 Difference]: Without dead ends: 176 [2020-08-18 20:25:26,884 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 20:25:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-08-18 20:25:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-08-18 20:25:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 20:25:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-08-18 20:25:26,896 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-08-18 20:25:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:26,897 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-08-18 20:25:26,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:25:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-08-18 20:25:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 20:25:26,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:26,899 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 20:25:26,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:25:26,899 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 10 times [2020-08-18 20:25:26,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:26,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117687011] [2020-08-18 20:25:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:25:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 20:25:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,088 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 20:25:27,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117687011] [2020-08-18 20:25:27,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:27,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 20:25:27,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640073857] [2020-08-18 20:25:27,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:25:27,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:25:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:25:27,091 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 9 states. [2020-08-18 20:25:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:27,401 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2020-08-18 20:25:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:25:27,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 20:25:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:27,403 INFO L225 Difference]: With dead ends: 175 [2020-08-18 20:25:27,404 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 20:25:27,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:25:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 20:25:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-08-18 20:25:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-18 20:25:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-08-18 20:25:27,423 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 135 [2020-08-18 20:25:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:27,424 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-08-18 20:25:27,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:25:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-08-18 20:25:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-18 20:25:27,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:27,426 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 20:25:27,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:25:27,426 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 11 times [2020-08-18 20:25:27,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:27,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134573081] [2020-08-18 20:25:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:25:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 20:25:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 20:25:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:27,634 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 20:25:27,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134573081] [2020-08-18 20:25:27,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:27,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:25:27,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853210705] [2020-08-18 20:25:27,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:25:27,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:25:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:25:27,638 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 10 states. [2020-08-18 20:25:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:27,999 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2020-08-18 20:25:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:25:28,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2020-08-18 20:25:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:28,003 INFO L225 Difference]: With dead ends: 208 [2020-08-18 20:25:28,003 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 20:25:28,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:25:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 20:25:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-08-18 20:25:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 20:25:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-08-18 20:25:28,026 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 168 [2020-08-18 20:25:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:28,027 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-08-18 20:25:28,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:25:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-08-18 20:25:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-18 20:25:28,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:28,032 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 20:25:28,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 20:25:28,033 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash -886069047, now seen corresponding path program 12 times [2020-08-18 20:25:28,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:28,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500096898] [2020-08-18 20:25:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:25:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 20:25:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 20:25:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 20:25:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-18 20:25:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:28,392 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 20:25:28,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500096898] [2020-08-18 20:25:28,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:25:28,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:25:28,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647539163] [2020-08-18 20:25:28,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:25:28,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:25:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:25:28,394 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 7 states. [2020-08-18 20:25:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:28,601 INFO L93 Difference]: Finished difference Result 204 states and 240 transitions. [2020-08-18 20:25:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:25:28,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-08-18 20:25:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:28,603 INFO L225 Difference]: With dead ends: 204 [2020-08-18 20:25:28,604 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:25:28,605 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 20:25:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:25:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:25:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:25:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:25:28,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-08-18 20:25:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:28,607 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:25:28,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:25:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:25:28,607 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:25:28,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 20:25:28,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:25:28,924 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-08-18 20:25:28,925 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-08-18 20:25:28,925 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-08-18 20:25:28,925 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-08-18 20:25:28,925 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-08-18 20:25:28,925 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-08-18 20:25:28,925 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-08-18 20:25:28,925 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-08-18 20:25:28,925 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-08-18 20:25:28,926 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-08-18 20:25:28,926 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-08-18 20:25:28,926 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-08-18 20:25:28,926 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-08-18 20:25:28,926 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-08-18 20:25:28,927 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 20:25:28,927 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-08-18 20:25:28,927 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-08-18 20:25:28,927 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-08-18 20:25:28,928 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-08-18 20:25:28,928 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-18 20:25:28,928 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-08-18 20:25:28,928 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-08-18 20:25:28,928 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-08-18 20:25:28,929 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-08-18 20:25:28,929 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-08-18 20:25:28,929 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-08-18 20:25:28,930 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-08-18 20:25:28,930 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-08-18 20:25:28,930 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-08-18 20:25:28,930 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 20:25:28,930 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-08-18 20:25:28,931 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-08-18 20:25:28,931 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-08-18 20:25:28,931 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:25:28,932 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 20:25:28,932 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:25:28,932 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-08-18 20:25:28,932 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-08-18 20:25:28,934 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-08-18 20:25:28,934 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-08-18 20:25:28,934 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-08-18 20:25:28,934 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:25:28,935 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:25:28,935 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:25:28,935 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:25:28,935 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 20:25:28,935 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-08-18 20:25:28,936 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-08-18 20:25:28,936 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-08-18 20:25:28,938 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 20:25:28,938 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-08-18 20:25:28,938 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-08-18 20:25:28,938 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-08-18 20:25:28,939 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 20:25:28,939 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 20:25:28,939 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-08-18 20:25:28,940 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 20:25:28,940 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 20:25:28,941 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 20:25:28,941 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 20:25:28,941 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 20:25:28,941 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 20:25:28,942 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 20:25:28,942 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 20:25:28,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:25:28 BoogieIcfgContainer [2020-08-18 20:25:28,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:25:28,984 INFO L168 Benchmark]: Toolchain (without parser) took 8249.86 ms. Allocated memory was 138.4 MB in the beginning and 327.2 MB in the end (delta: 188.7 MB). Free memory was 100.1 MB in the beginning and 193.3 MB in the end (delta: -93.2 MB). Peak memory consumption was 95.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:28,992 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 20:25:28,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 481.25 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.9 MB in the beginning and 178.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:28,996 INFO L168 Benchmark]: Boogie Preprocessor took 52.80 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:28,997 INFO L168 Benchmark]: RCFGBuilder took 523.95 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 148.3 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:29,004 INFO L168 Benchmark]: TraceAbstraction took 7183.16 ms. Allocated memory was 200.8 MB in the beginning and 327.2 MB in the end (delta: 126.4 MB). Free memory was 147.6 MB in the beginning and 193.3 MB in the end (delta: -45.7 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:29,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 481.25 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.9 MB in the beginning and 178.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.80 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 523.95 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 148.3 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7183.16 ms. Allocated memory was 200.8 MB in the beginning and 327.2 MB in the end (delta: 126.4 MB). Free memory was 147.6 MB in the beginning and 193.3 MB in the end (delta: -45.7 MB). Peak memory consumption was 80.7 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: 6.7s, OverallIterations: 16, TraceHistogramMax: 36, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 467 SDslu, 506 SDs, 0 SdLazy, 1311 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.4s 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: 0.1s 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, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s 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...