/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:42:39,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:42:39,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:42:40,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:42:40,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:42:40,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:42:40,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:42:40,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:42:40,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:42:40,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:42:40,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:42:40,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:42:40,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:42:40,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:42:40,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:42:40,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:42:40,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:42:40,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:42:40,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:42:40,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:42:40,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:42:40,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:42:40,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:42:40,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:42:40,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:42:40,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:42:40,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:42:40,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:42:40,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:42:40,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 20:42:40,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:42:40,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:42:40,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:42:40,055 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 [2020-08-21 20:42:40,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:42:40,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:42:40,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:42:40,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:42:40,080 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:42:40,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:42:40,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:42:40,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:42:40,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:42:40,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:42:40,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:42:40,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:42:40,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:42:40,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:42:40,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:42:40,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:42:40,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:42:40,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:42:40,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:42:40,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:42:40,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:42:40,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:42:40,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:42:40,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:42:40,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:42:40,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:42:40,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:42:40,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:42:40,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:42:40,429 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:42:40,430 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-21 20:42:40,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6897c7e57/1d90d79b6fd647e4aa34086eb87cc970/FLAG7df49296a [2020-08-21 20:42:40,959 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:42:40,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-21 20:42:40,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6897c7e57/1d90d79b6fd647e4aa34086eb87cc970/FLAG7df49296a [2020-08-21 20:42:41,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6897c7e57/1d90d79b6fd647e4aa34086eb87cc970 [2020-08-21 20:42:41,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:42:41,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:42:41,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:41,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:42:41,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:42:41,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfcebea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41, skipping insertion in model container [2020-08-21 20:42:41,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:42:41,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:42:41,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:41,575 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:42:41,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:41,609 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:42:41,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41 WrapperNode [2020-08-21 20:42:41,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:41,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:42:41,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:42:41,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:42:41,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (1/1) ... [2020-08-21 20:42:41,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:42:41,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:42:41,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:42:41,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:42:41,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (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 [2020-08-21 20:42:41,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:42:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:42:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:42:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:42:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:42:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:42:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:42:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:42:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:42:42,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:42:42,012 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 20:42:42,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:42 BoogieIcfgContainer [2020-08-21 20:42:42,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:42:42,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:42:42,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:42:42,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:42:42,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:42:41" (1/3) ... [2020-08-21 20:42:42,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a51277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:42, skipping insertion in model container [2020-08-21 20:42:42,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:41" (2/3) ... [2020-08-21 20:42:42,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a51277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:42, skipping insertion in model container [2020-08-21 20:42:42,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:42" (3/3) ... [2020-08-21 20:42:42,026 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-21 20:42:42,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:42:42,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:42:42,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:42:42,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:42:42,142 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:42:42,142 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:42:42,142 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:42:42,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:42:42,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:42:42,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:42:42,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:42:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 20:42:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 20:42:42,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:42,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:42,173 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-08-21 20:42:42,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:42,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114816174] [2020-08-21 20:42:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:42,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114816174] [2020-08-21 20:42:42,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:42:42,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 20:42:42,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37044350] [2020-08-21 20:42:42,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 20:42:42,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 20:42:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:42:42,349 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 20:42:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:42,371 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-08-21 20:42:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 20:42:42,373 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 20:42:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:42,381 INFO L225 Difference]: With dead ends: 49 [2020-08-21 20:42:42,382 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 20:42:42,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:42:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 20:42:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 20:42:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 20:42:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 20:42:42,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-21 20:42:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:42,429 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 20:42:42,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 20:42:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 20:42:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 20:42:42,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:42,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:42,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:42:42,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-08-21 20:42:42,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:42,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225197668] [2020-08-21 20:42:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:42,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225197668] [2020-08-21 20:42:42,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:42:42,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:42:42,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454325939] [2020-08-21 20:42:42,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:42:42,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:42:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:42:42,562 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-08-21 20:42:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:42,590 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-21 20:42:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:42:42,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-08-21 20:42:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:42,592 INFO L225 Difference]: With dead ends: 48 [2020-08-21 20:42:42,592 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 20:42:42,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:42:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 20:42:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-08-21 20:42:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 20:42:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 20:42:42,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-08-21 20:42:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:42,601 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 20:42:42,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:42:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 20:42:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 20:42:42,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:42,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:42,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:42:42,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:42,604 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-08-21 20:42:42,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:42,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6007880] [2020-08-21 20:42:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:42,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6007880] [2020-08-21 20:42:42,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:42,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 20:42:42,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950625563] [2020-08-21 20:42:42,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:42:42,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:42:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:42:42,715 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-08-21 20:42:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:42,759 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-21 20:42:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 20:42:42,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-21 20:42:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:42,761 INFO L225 Difference]: With dead ends: 51 [2020-08-21 20:42:42,762 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 20:42:42,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:42:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 20:42:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-21 20:42:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 20:42:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-21 20:42:42,770 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-08-21 20:42:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:42,770 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-21 20:42:42,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:42:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-21 20:42:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:42:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:42,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:42,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:42:42,772 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-08-21 20:42:42,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:42,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241021323] [2020-08-21 20:42:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:42,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241021323] [2020-08-21 20:42:42,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:42,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 20:42:42,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286394180] [2020-08-21 20:42:42,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:42:42,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:42:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:42:42,871 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-21 20:42:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:42,908 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-21 20:42:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:42:42,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 20:42:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:42,910 INFO L225 Difference]: With dead ends: 55 [2020-08-21 20:42:42,910 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 20:42:42,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:42:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 20:42:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-08-21 20:42:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 20:42:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-21 20:42:42,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-08-21 20:42:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:42,919 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-21 20:42:42,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:42:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-21 20:42:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:42:42,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:42,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:42,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:42:42,920 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-08-21 20:42:42,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:42,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307634531] [2020-08-21 20:42:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:43,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307634531] [2020-08-21 20:42:43,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:43,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 20:42:43,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80307500] [2020-08-21 20:42:43,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:42:43,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:42:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:42:43,040 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-08-21 20:42:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:43,090 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-08-21 20:42:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:42:43,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 20:42:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:43,092 INFO L225 Difference]: With dead ends: 59 [2020-08-21 20:42:43,092 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 20:42:43,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:42:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 20:42:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-08-21 20:42:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 20:42:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 20:42:43,100 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-21 20:42:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:43,101 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 20:42:43,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:42:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 20:42:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:42:43,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:43,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:43,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:42:43,103 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:43,103 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-08-21 20:42:43,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:43,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764564500] [2020-08-21 20:42:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:43,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764564500] [2020-08-21 20:42:43,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:43,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:42:43,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256726016] [2020-08-21 20:42:43,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:42:43,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:43,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:42:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:42:43,300 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-21 20:42:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:43,379 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-08-21 20:42:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 20:42:43,381 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 20:42:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:43,382 INFO L225 Difference]: With dead ends: 63 [2020-08-21 20:42:43,382 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 20:42:43,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:42:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 20:42:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-08-21 20:42:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 20:42:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-21 20:42:43,399 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-21 20:42:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:43,400 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-21 20:42:43,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:42:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-21 20:42:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 20:42:43,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:43,405 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:43,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:42:43,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-08-21 20:42:43,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:43,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113175358] [2020-08-21 20:42:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:43,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113175358] [2020-08-21 20:42:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 20:42:43,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744587404] [2020-08-21 20:42:43,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:42:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:42:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:42:43,541 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-21 20:42:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:43,612 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-21 20:42:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:42:43,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-21 20:42:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:43,614 INFO L225 Difference]: With dead ends: 67 [2020-08-21 20:42:43,614 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 20:42:43,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:42:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 20:42:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-21 20:42:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 20:42:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 20:42:43,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-21 20:42:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:43,622 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 20:42:43,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:42:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 20:42:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:42:43,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:43,623 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:43,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:42:43,624 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:43,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-08-21 20:42:43,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:43,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160079388] [2020-08-21 20:42:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:43,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160079388] [2020-08-21 20:42:43,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:43,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:42:43,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827295970] [2020-08-21 20:42:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:42:43,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:42:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:42:43,754 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-21 20:42:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:43,846 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-08-21 20:42:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:42:43,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 20:42:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:43,847 INFO L225 Difference]: With dead ends: 71 [2020-08-21 20:42:43,847 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 20:42:43,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:42:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 20:42:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-08-21 20:42:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 20:42:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-21 20:42:43,854 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-21 20:42:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:43,854 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-21 20:42:43,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:42:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-21 20:42:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 20:42:43,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:43,856 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:43,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:42:43,856 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:43,857 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-08-21 20:42:43,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:43,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64716788] [2020-08-21 20:42:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:44,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64716788] [2020-08-21 20:42:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:44,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:42:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891211175] [2020-08-21 20:42:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:42:44,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:42:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:42:44,038 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-21 20:42:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:44,152 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-08-21 20:42:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:42:44,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 20:42:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:44,154 INFO L225 Difference]: With dead ends: 75 [2020-08-21 20:42:44,154 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 20:42:44,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:42:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 20:42:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-08-21 20:42:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 20:42:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-21 20:42:44,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-21 20:42:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:44,161 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-21 20:42:44,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:42:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-21 20:42:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 20:42:44,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:44,163 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:44,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:42:44,163 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:44,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-08-21 20:42:44,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:44,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534948240] [2020-08-21 20:42:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:44,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534948240] [2020-08-21 20:42:44,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:44,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:42:44,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959651] [2020-08-21 20:42:44,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:42:44,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:42:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:42:44,317 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-21 20:42:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:44,447 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-08-21 20:42:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:42:44,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 20:42:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:44,448 INFO L225 Difference]: With dead ends: 79 [2020-08-21 20:42:44,448 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 20:42:44,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:42:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 20:42:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-08-21 20:42:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 20:42:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-21 20:42:44,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-21 20:42:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:44,455 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-21 20:42:44,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:42:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-21 20:42:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 20:42:44,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:44,457 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:44,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:42:44,457 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-08-21 20:42:44,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:44,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562678477] [2020-08-21 20:42:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:44,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562678477] [2020-08-21 20:42:44,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:44,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:42:44,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546196702] [2020-08-21 20:42:44,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:42:44,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:44,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:42:44,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:42:44,655 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-21 20:42:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:44,803 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-08-21 20:42:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:42:44,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-21 20:42:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:44,805 INFO L225 Difference]: With dead ends: 83 [2020-08-21 20:42:44,805 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 20:42:44,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:42:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 20:42:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-08-21 20:42:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 20:42:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-21 20:42:44,817 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-21 20:42:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:44,817 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-21 20:42:44,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:42:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-21 20:42:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:42:44,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:44,821 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:44,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:42:44,821 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-08-21 20:42:44,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:44,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652437629] [2020-08-21 20:42:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:48,843 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 77 DAG size of output: 13 [2020-08-21 20:42:48,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:48,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652437629] [2020-08-21 20:42:48,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:48,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 20:42:48,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101463674] [2020-08-21 20:42:48,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 20:42:48,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 20:42:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:42:48,989 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 15 states. [2020-08-21 20:42:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:49,242 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-21 20:42:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:42:49,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-21 20:42:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:49,244 INFO L225 Difference]: With dead ends: 66 [2020-08-21 20:42:49,244 INFO L226 Difference]: Without dead ends: 64 [2020-08-21 20:42:49,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:42:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-21 20:42:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-21 20:42:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 20:42:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-08-21 20:42:49,251 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-08-21 20:42:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:49,251 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-08-21 20:42:49,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 20:42:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-08-21 20:42:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 20:42:49,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:49,253 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:49,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:42:49,253 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-08-21 20:42:49,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:49,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059288119] [2020-08-21 20:42:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:49,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:49,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059288119] [2020-08-21 20:42:49,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:42:49,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 20:42:49,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698155315] [2020-08-21 20:42:49,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:42:49,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:42:49,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:42:49,445 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-08-21 20:42:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:49,648 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-08-21 20:42:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 20:42:49,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-21 20:42:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:49,649 INFO L225 Difference]: With dead ends: 89 [2020-08-21 20:42:49,649 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 20:42:49,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:42:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 20:42:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 20:42:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 20:42:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 20:42:49,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-21 20:42:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:49,651 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 20:42:49,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:42:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 20:42:49,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 20:42:49,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:42:49,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 20:42:49,854 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-08-21 20:42:49,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 20:42:49,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:42:49,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:42:49,891 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 20:42:49,891 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 20:42:49,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 20:42:49,892 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-08-21 20:42:49,892 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-08-21 20:42:49,892 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 20:42:49,892 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 20:42:49,892 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-08-21 20:42:49,893 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (let ((.cse0 (div main_~v~0 4294967296))) (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= .cse0 0) (not (= main_~v~0 (let ((.cse1 (div main_~v~0 4))) (+ (* (div (+ main_~v~0 (* .cse1 (- 4))) 4294967296) 4294967296) (* .cse1 4))))) (<= 10 main_~v~0)) (and (<= main_~v~0 8) (< 0 (+ .cse0 1))))) [2020-08-21 20:42:49,893 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= (div main_~v~0 4294967296) 0) (not (= main_~v~0 (let ((.cse0 (div main_~v~0 4))) (+ (* 4294967296 (div (+ main_~v~0 (* .cse0 (- 4))) 4294967296)) (* 4 .cse0))))) (<= 10 main_~v~0)) [2020-08-21 20:42:49,893 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-08-21 20:42:49,893 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 20:42:49,893 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-08-21 20:42:49,893 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-08-21 20:42:49,894 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-08-21 20:42:49,895 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-08-21 20:42:49,895 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-08-21 20:42:49,896 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 20:42:49,896 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 20:42:49,896 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 20:42:49,896 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 20:42:49,896 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 20:42:49,896 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 20:42:49,896 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 20:42:49,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:42:49 BoogieIcfgContainer [2020-08-21 20:42:49,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:42:49,933 INFO L168 Benchmark]: Toolchain (without parser) took 8570.96 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 102.0 MB in the beginning and 117.4 MB in the end (delta: -15.4 MB). Peak memory consumption was 91.1 MB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,934 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.03 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,936 INFO L168 Benchmark]: Boogie Preprocessor took 109.23 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,936 INFO L168 Benchmark]: RCFGBuilder took 295.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,937 INFO L168 Benchmark]: TraceAbstraction took 7912.28 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 166.4 MB in the beginning and 117.4 MB in the end (delta: 49.0 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. [2020-08-21 20:42:49,940 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.03 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.23 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7912.28 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 166.4 MB in the beginning and 117.4 MB in the end (delta: 49.0 MB). Peak memory consumption was 93.0 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: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || ((v / 4294967296 <= 0 && !(v == (v + v / 4 * -4) / 4294967296 * 4294967296 + v / 4 * 4)) && 10 <= v)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 216 SDslu, 1651 SDs, 0 SdLazy, 1279 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=12, 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, 13 MinimizatonAttempts, 96 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 44 NumberOfFragments, 150 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 33605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 21/506 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...