/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:26:14,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:26:14,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:26:14,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:26:14,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:26:14,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:26:14,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:26:14,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:26:14,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:26:14,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:26:14,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:26:14,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:26:14,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:26:14,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:26:14,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:26:14,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:26:14,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:26:14,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:26:14,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:26:14,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:26:14,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:26:14,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:26:14,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:26:14,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:26:14,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:26:14,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:26:14,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:26:14,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:26:14,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:26:14,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:26:15,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:26:15,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:26:15,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:26:15,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:26:15,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:26:15,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:26:15,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:26:15,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:26:15,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:26:15,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:26:15,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:26:15,007 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 13:26:15,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:26:15,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:26:15,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:26:15,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:26:15,029 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:26:15,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:26:15,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:26:15,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:26:15,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:26:15,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:26:15,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:26:15,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:26:15,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:26:15,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:26:15,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:26:15,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:26:15,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:26:15,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:26:15,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:26:15,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:26:15,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:26:15,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:26:15,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:26:15,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:26:15,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:26:15,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:26:15,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:26:15,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:26:15,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:26:15,034 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 -> false [2020-08-21 13:26:15,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:26:15,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:26:15,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:26:15,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:26:15,361 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:26:15,361 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-21 13:26:15,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55913f563/e4ce9df614034e92ba193bb575e6594b/FLAGc94eb7c55 [2020-08-21 13:26:15,791 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:26:15,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-21 13:26:15,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55913f563/e4ce9df614034e92ba193bb575e6594b/FLAGc94eb7c55 [2020-08-21 13:26:16,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55913f563/e4ce9df614034e92ba193bb575e6594b [2020-08-21 13:26:16,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:26:16,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:26:16,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:16,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:26:16,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:26:16,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49890d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16, skipping insertion in model container [2020-08-21 13:26:16,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:26:16,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:26:16,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:16,413 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:26:16,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:16,444 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:26:16,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16 WrapperNode [2020-08-21 13:26:16,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:16,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:26:16,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:26:16,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:26:16,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (1/1) ... [2020-08-21 13:26:16,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:26:16,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:26:16,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:26:16,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:26:16,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (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 13:26:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:26:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:26:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:26:16,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:26:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:26:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:26:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 13:26:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:26:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:26:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:26:16,800 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:26:16,801 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:26:16,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:16 BoogieIcfgContainer [2020-08-21 13:26:16,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:26:16,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:26:16,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:26:16,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:26:16,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:26:16" (1/3) ... [2020-08-21 13:26:16,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4e8709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:16, skipping insertion in model container [2020-08-21 13:26:16,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:16" (2/3) ... [2020-08-21 13:26:16,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4e8709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:16, skipping insertion in model container [2020-08-21 13:26:16,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:16" (3/3) ... [2020-08-21 13:26:16,813 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-21 13:26:16,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:26:16,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:26:16,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:26:16,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:26:16,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:26:16,904 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:26:16,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:26:16,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:26:16,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:26:16,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:26:16,904 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:26:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 13:26:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 13:26:16,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:16,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:16,944 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-21 13:26:16,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:16,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960622050] [2020-08-21 13:26:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,091 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 13:26:17,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960622050] [2020-08-21 13:26:17,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:17,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 13:26:17,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800398723] [2020-08-21 13:26:17,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 13:26:17,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 13:26:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 13:26:17,117 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-21 13:26:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,140 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-21 13:26:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 13:26:17,142 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 13:26:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,150 INFO L225 Difference]: With dead ends: 30 [2020-08-21 13:26:17,151 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 13:26:17,155 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 13:26:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 13:26:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 13:26:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 13:26:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-21 13:26:17,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-21 13:26:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:17,197 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-21 13:26:17,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 13:26:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-21 13:26:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 13:26:17,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:17,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:17,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:26:17,199 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-21 13:26:17,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308807950] [2020-08-21 13:26:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,293 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 13:26:17,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308807950] [2020-08-21 13:26:17,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:17,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:26:17,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455825613] [2020-08-21 13:26:17,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:17,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:17,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:17,298 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-21 13:26:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,344 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-21 13:26:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:26:17,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 13:26:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,346 INFO L225 Difference]: With dead ends: 21 [2020-08-21 13:26:17,346 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 13:26:17,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 13:26:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 13:26:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 13:26:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-21 13:26:17,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-21 13:26:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:17,355 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-21 13:26:17,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-21 13:26:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:26:17,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:17,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:17,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:26:17,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-21 13:26:17,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:17,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023415185] [2020-08-21 13:26:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,678 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 13:26:17,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023415185] [2020-08-21 13:26:17,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:17,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:26:17,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637363267] [2020-08-21 13:26:17,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:26:17,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:26:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:17,681 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-21 13:26:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,809 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-21 13:26:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:26:17,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-21 13:26:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,813 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:26:17,813 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 13:26:17,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:26:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 13:26:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-21 13:26:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 13:26:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-21 13:26:17,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-21 13:26:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:17,822 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-21 13:26:17,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:26:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-21 13:26:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:26:17,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:17,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:17,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:26:17,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-21 13:26:17,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:17,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922242483] [2020-08-21 13:26:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:26:17,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922242483] [2020-08-21 13:26:17,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:17,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:26:17,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455741325] [2020-08-21 13:26:17,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:26:17,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:26:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:26:17,893 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-21 13:26:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,917 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-21 13:26:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:26:17,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 13:26:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,919 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:26:17,919 INFO L226 Difference]: Without dead ends: 17 [2020-08-21 13:26:17,920 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 13:26:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-21 13:26:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-21 13:26:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-21 13:26:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-21 13:26:17,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-21 13:26:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:17,926 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-21 13:26:17,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:26:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-21 13:26:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:26:17,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:17,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:17,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:26:17,928 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-21 13:26:17,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:17,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218535718] [2020-08-21 13:26:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:17,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218535718] [2020-08-21 13:26:17,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:17,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 13:26:17,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58489307] [2020-08-21 13:26:17,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:26:17,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:26:17,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:26:17,963 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-21 13:26:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,994 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-21 13:26:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:26:17,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-21 13:26:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,996 INFO L225 Difference]: With dead ends: 27 [2020-08-21 13:26:17,996 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 13:26:17,997 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 13:26:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 13:26:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-21 13:26:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:26:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:26:18,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-21 13:26:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,003 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:26:18,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:26:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:26:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:26:18,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:26:18,005 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-21 13:26:18,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842429042] [2020-08-21 13:26:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 13:26:18,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842429042] [2020-08-21 13:26:18,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:26:18,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893308216] [2020-08-21 13:26:18,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:26:18,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:26:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:26:18,212 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-21 13:26:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,380 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-21 13:26:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:26:18,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-21 13:26:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,381 INFO L225 Difference]: With dead ends: 27 [2020-08-21 13:26:18,382 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 13:26:18,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:26:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 13:26:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-21 13:26:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:26:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-21 13:26:18,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-21 13:26:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,388 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-21 13:26:18,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:26:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-21 13:26:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:26:18,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:26:18,390 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-21 13:26:18,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45937609] [2020-08-21 13:26:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:18,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45937609] [2020-08-21 13:26:18,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 13:26:18,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979879285] [2020-08-21 13:26:18,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:18,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:18,448 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-21 13:26:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,500 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 13:26:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:26:18,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 13:26:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,503 INFO L225 Difference]: With dead ends: 33 [2020-08-21 13:26:18,503 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 13:26:18,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 13:26:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-21 13:26:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:26:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 13:26:18,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-21 13:26:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,516 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 13:26:18,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 13:26:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:26:18,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,518 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:26:18,519 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-21 13:26:18,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013620412] [2020-08-21 13:26:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:18,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013620412] [2020-08-21 13:26:18,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:26:18,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071395642] [2020-08-21 13:26:18,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:18,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:18,628 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-21 13:26:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,670 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-21 13:26:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:26:18,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 13:26:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,673 INFO L225 Difference]: With dead ends: 36 [2020-08-21 13:26:18,673 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 13:26:18,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 13:26:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-21 13:26:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:26:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 13:26:18,684 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-21 13:26:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,685 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 13:26:18,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 13:26:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:26:18,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,688 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:26:18,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-21 13:26:18,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298864061] [2020-08-21 13:26:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:18,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298864061] [2020-08-21 13:26:18,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:26:18,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529166738] [2020-08-21 13:26:18,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:18,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:18,783 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-21 13:26:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,840 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 13:26:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:18,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 13:26:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,842 INFO L225 Difference]: With dead ends: 39 [2020-08-21 13:26:18,842 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 13:26:18,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 13:26:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-21 13:26:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:26:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-21 13:26:18,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-21 13:26:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,848 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-21 13:26:18,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-21 13:26:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:26:18,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,849 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:26:18,850 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-21 13:26:18,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183150861] [2020-08-21 13:26:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:18,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183150861] [2020-08-21 13:26:18,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:26:18,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761457453] [2020-08-21 13:26:18,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:26:18,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:26:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:18,911 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-21 13:26:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,953 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 13:26:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:26:18,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-21 13:26:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,954 INFO L225 Difference]: With dead ends: 42 [2020-08-21 13:26:18,954 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 13:26:18,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 13:26:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-21 13:26:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:26:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 13:26:18,960 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-21 13:26:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,961 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 13:26:18,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:26:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 13:26:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:26:18,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,962 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:18,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:26:18,962 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-21 13:26:18,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720911143] [2020-08-21 13:26:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:19,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720911143] [2020-08-21 13:26:19,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:19,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:26:19,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445235717] [2020-08-21 13:26:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:26:19,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:26:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:19,033 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-21 13:26:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:19,089 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-21 13:26:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:26:19,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-21 13:26:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:19,091 INFO L225 Difference]: With dead ends: 45 [2020-08-21 13:26:19,091 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 13:26:19,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 13:26:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 13:26:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 13:26:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 13:26:19,098 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-21 13:26:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:19,099 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 13:26:19,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:26:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 13:26:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 13:26:19,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:19,100 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:19,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:26:19,101 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-21 13:26:19,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:19,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951068305] [2020-08-21 13:26:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:19,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951068305] [2020-08-21 13:26:19,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:19,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:26:19,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737098912] [2020-08-21 13:26:19,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:26:19,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:26:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:26:19,188 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-21 13:26:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:19,244 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-21 13:26:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:26:19,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-21 13:26:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:19,245 INFO L225 Difference]: With dead ends: 48 [2020-08-21 13:26:19,246 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 13:26:19,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:26:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 13:26:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-21 13:26:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:26:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 13:26:19,252 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-21 13:26:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:19,252 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 13:26:19,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:26:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 13:26:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:26:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:19,253 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:19,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:26:19,254 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-21 13:26:19,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:19,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641422943] [2020-08-21 13:26:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:19,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641422943] [2020-08-21 13:26:19,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:19,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:26:19,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309481051] [2020-08-21 13:26:19,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:26:19,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:26:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:26:19,345 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-21 13:26:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:19,404 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-21 13:26:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:26:19,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-21 13:26:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:19,406 INFO L225 Difference]: With dead ends: 51 [2020-08-21 13:26:19,406 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 13:26:19,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:26:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 13:26:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-21 13:26:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 13:26:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-21 13:26:19,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-21 13:26:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:19,413 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-21 13:26:19,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:26:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-21 13:26:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 13:26:19,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:19,414 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:19,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:26:19,415 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-21 13:26:19,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:19,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539479439] [2020-08-21 13:26:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:26:19,430 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:26:19,430 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:26:19,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:26:19,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:19 BoogieIcfgContainer [2020-08-21 13:26:19,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:26:19,459 INFO L168 Benchmark]: Toolchain (without parser) took 3253.93 ms. Allocated memory was 138.4 MB in the beginning and 250.1 MB in the end (delta: 111.7 MB). Free memory was 102.1 MB in the beginning and 184.9 MB in the end (delta: -82.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,460 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:26:19,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.78 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,462 INFO L168 Benchmark]: Boogie Preprocessor took 104.35 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.1 MB in the beginning and 180.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,466 INFO L168 Benchmark]: RCFGBuilder took 251.60 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 167.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,467 INFO L168 Benchmark]: TraceAbstraction took 2646.94 ms. Allocated memory was 200.3 MB in the beginning and 250.1 MB in the end (delta: 49.8 MB). Free memory was 166.9 MB in the beginning and 184.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,473 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.78 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.35 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.1 MB in the beginning and 180.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 251.60 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 167.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2646.94 ms. Allocated memory was 200.3 MB in the beginning and 250.1 MB in the end (delta: 49.8 MB). Free memory was 166.9 MB in the beginning and 184.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, 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, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 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 incorrect! Received shutdown request...