/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:08:19,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:08:19,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:08:19,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:08:19,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:08:19,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:08:19,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:08:19,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:08:19,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:08:19,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:08:19,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:08:19,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:08:19,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:08:19,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:08:19,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:08:19,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:08:19,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:08:19,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:08:19,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:08:19,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:08:19,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:08:19,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:08:19,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:08:19,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:08:19,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:08:19,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:08:19,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:08:19,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:08:19,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:08:19,698 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:08:19,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:08:19,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:08:19,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:08:19,703 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:08:19,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:08:19,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:08:19,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:08:19,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:08:19,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:08:19,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:08:19,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:08:19,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:08:19,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:08:19,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:08:19,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:08:19,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:08:19,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:08:19,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:08:19,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:08:19,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:08:19,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:08:19,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:08:19,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:08:19,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:08:20,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:08:20,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:08:20,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:08:20,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:08:20,026 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:08:20,027 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-18 12:08:20,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b813f2b/638f02c2ddd24161a7dec1a516c1f97a/FLAG72feddaac [2020-08-18 12:08:20,582 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:08:20,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-18 12:08:20,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b813f2b/638f02c2ddd24161a7dec1a516c1f97a/FLAG72feddaac [2020-08-18 12:08:20,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b813f2b/638f02c2ddd24161a7dec1a516c1f97a [2020-08-18 12:08:20,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:08:20,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:08:20,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:08:20,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:08:20,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:08:20,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:08:20" (1/1) ... [2020-08-18 12:08:20,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67578ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:20, skipping insertion in model container [2020-08-18 12:08:20,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:08:20" (1/1) ... [2020-08-18 12:08:20,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:08:20,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:08:21,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:08:21,149 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:08:21,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:08:21,186 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:08:21,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21 WrapperNode [2020-08-18 12:08:21,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:08:21,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:08:21,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:08:21,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:08:21,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... [2020-08-18 12:08:21,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:08:21,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:08:21,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:08:21,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:08:21,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:08:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:08:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:08:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 12:08:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:08:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:08:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 12:08:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:08:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:08:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:08:21,532 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:08:21,533 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:08:21,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:08:21 BoogieIcfgContainer [2020-08-18 12:08:21,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:08:21,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:08:21,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:08:21,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:08:21,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:08:20" (1/3) ... [2020-08-18 12:08:21,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54519f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:08:21, skipping insertion in model container [2020-08-18 12:08:21,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:08:21" (2/3) ... [2020-08-18 12:08:21,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54519f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:08:21, skipping insertion in model container [2020-08-18 12:08:21,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:08:21" (3/3) ... [2020-08-18 12:08:21,546 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-08-18 12:08:21,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:08:21,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:08:21,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:08:21,636 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:08:21,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:08:21,637 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:08:21,637 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:08:21,638 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:08:21,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:08:21,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:08:21,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:08:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 12:08:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 12:08:21,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:21,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:21,675 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:21,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 12:08:21,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:21,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075902310] [2020-08-18 12:08:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:21,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:21,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:08:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075902310] [2020-08-18 12:08:21,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:08:21,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:08:21,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039298843] [2020-08-18 12:08:21,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:08:21,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:08:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:08:22,001 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 12:08:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:22,093 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 12:08:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:08:22,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 12:08:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:22,107 INFO L225 Difference]: With dead ends: 30 [2020-08-18 12:08:22,108 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 12:08:22,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:08:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 12:08:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 12:08:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 12:08:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 12:08:22,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 12:08:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:22,169 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 12:08:22,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:08:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 12:08:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 12:08:22,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:22,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:22,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:08:22,178 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 12:08:22,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:22,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257774747] [2020-08-18 12:08:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 12:08:22,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257774747] [2020-08-18 12:08:22,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:22,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:08:22,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274053629] [2020-08-18 12:08:22,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:08:22,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:08:22,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:08:22,329 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 12:08:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:22,431 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 12:08:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:08:22,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 12:08:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:22,435 INFO L225 Difference]: With dead ends: 25 [2020-08-18 12:08:22,435 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 12:08:22,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:08:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 12:08:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 12:08:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 12:08:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 12:08:22,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 12:08:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:22,452 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 12:08:22,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:08:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 12:08:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 12:08:22,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:22,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:22,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:08:22,457 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 12:08:22,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:22,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760373774] [2020-08-18 12:08:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 12:08:22,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760373774] [2020-08-18 12:08:22,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:22,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:08:22,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750861562] [2020-08-18 12:08:22,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:08:22,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:22,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:08:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:08:22,635 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 12:08:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:22,703 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 12:08:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:08:22,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 12:08:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:22,705 INFO L225 Difference]: With dead ends: 28 [2020-08-18 12:08:22,705 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 12:08:22,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:08:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 12:08:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 12:08:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 12:08:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 12:08:22,714 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 12:08:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:22,715 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 12:08:22,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:08:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 12:08:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 12:08:22,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:22,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:22,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:08:22,717 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 12:08:22,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:22,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442505087] [2020-08-18 12:08:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 12:08:22,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442505087] [2020-08-18 12:08:22,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:22,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 12:08:22,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171961388] [2020-08-18 12:08:22,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:08:22,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:08:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:08:22,883 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 12:08:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:22,984 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 12:08:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:08:22,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 12:08:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:22,986 INFO L225 Difference]: With dead ends: 31 [2020-08-18 12:08:22,986 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 12:08:22,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:08:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 12:08:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 12:08:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 12:08:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 12:08:22,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 12:08:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:22,994 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 12:08:22,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:08:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 12:08:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 12:08:22,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:22,996 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:22,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:08:22,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 12:08:22,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:22,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705620633] [2020-08-18 12:08:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 12:08:23,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705620633] [2020-08-18 12:08:23,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:23,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:08:23,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094736885] [2020-08-18 12:08:23,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:08:23,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:08:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:08:23,237 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 12:08:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:23,317 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 12:08:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:08:23,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 12:08:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:23,319 INFO L225 Difference]: With dead ends: 34 [2020-08-18 12:08:23,319 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 12:08:23,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:08:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 12:08:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 12:08:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 12:08:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 12:08:23,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 12:08:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:23,327 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 12:08:23,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:08:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 12:08:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 12:08:23,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:23,329 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:23,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:08:23,330 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 12:08:23,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:23,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980468263] [2020-08-18 12:08:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 12:08:23,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980468263] [2020-08-18 12:08:23,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:23,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:08:23,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395059462] [2020-08-18 12:08:23,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:08:23,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:23,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:08:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:08:23,555 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 12:08:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:23,656 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 12:08:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:08:23,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 12:08:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:23,659 INFO L225 Difference]: With dead ends: 37 [2020-08-18 12:08:23,659 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 12:08:23,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:08:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 12:08:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 12:08:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 12:08:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 12:08:23,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 12:08:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:23,669 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 12:08:23,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:08:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 12:08:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 12:08:23,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:23,672 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:23,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:08:23,673 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 12:08:23,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:23,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943048226] [2020-08-18 12:08:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 12:08:23,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943048226] [2020-08-18 12:08:23,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:23,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:08:23,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886133871] [2020-08-18 12:08:23,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:08:23,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:08:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:08:23,920 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 12:08:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:24,028 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 12:08:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:08:24,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 12:08:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:24,030 INFO L225 Difference]: With dead ends: 40 [2020-08-18 12:08:24,030 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 12:08:24,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:08:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 12:08:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 12:08:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 12:08:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 12:08:24,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 12:08:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:24,038 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 12:08:24,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:08:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 12:08:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 12:08:24,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:24,040 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:24,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:08:24,040 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 12:08:24,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:24,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881028249] [2020-08-18 12:08:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 12:08:24,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881028249] [2020-08-18 12:08:24,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:24,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:08:24,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277066386] [2020-08-18 12:08:24,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:08:24,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:08:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:08:24,261 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 12:08:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:24,386 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 12:08:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:08:24,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 12:08:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:24,388 INFO L225 Difference]: With dead ends: 43 [2020-08-18 12:08:24,388 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 12:08:24,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:08:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 12:08:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 12:08:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 12:08:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 12:08:24,396 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 12:08:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:24,396 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 12:08:24,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:08:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 12:08:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 12:08:24,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:24,398 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:24,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:08:24,399 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 12:08:24,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:24,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621757785] [2020-08-18 12:08:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 12:08:24,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621757785] [2020-08-18 12:08:24,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:24,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:08:24,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817807451] [2020-08-18 12:08:24,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:08:24,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:08:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:08:24,688 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 12:08:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:24,824 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 12:08:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 12:08:24,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 12:08:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:24,827 INFO L225 Difference]: With dead ends: 46 [2020-08-18 12:08:24,827 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 12:08:24,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:08:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 12:08:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 12:08:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:08:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 12:08:24,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 12:08:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:24,835 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 12:08:24,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:08:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 12:08:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 12:08:24,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:24,837 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:24,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:08:24,837 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:24,838 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 12:08:24,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:24,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438217079] [2020-08-18 12:08:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:24,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 12:08:25,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438217079] [2020-08-18 12:08:25,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:08:25,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 12:08:25,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896527028] [2020-08-18 12:08:25,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 12:08:25,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 12:08:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:08:25,158 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 12:08:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:25,306 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 12:08:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:08:25,306 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 12:08:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:25,308 INFO L225 Difference]: With dead ends: 49 [2020-08-18 12:08:25,308 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 12:08:25,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 12:08:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 12:08:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 12:08:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:08:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 12:08:25,315 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 12:08:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:25,315 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 12:08:25,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 12:08:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 12:08:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 12:08:25,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:08:25,317 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:08:25,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:08:25,317 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:08:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:08:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 12:08:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:08:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087923586] [2020-08-18 12:08:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:08:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:08:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:08:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:08:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:08:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-08-18 12:08:25,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087923586] [2020-08-18 12:08:25,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:08:25,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:08:25,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822572929] [2020-08-18 12:08:25,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:08:25,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:08:25,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:08:25,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:08:25,748 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 8 states. [2020-08-18 12:08:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:08:25,883 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-08-18 12:08:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:08:25,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-18 12:08:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:08:25,884 INFO L225 Difference]: With dead ends: 45 [2020-08-18 12:08:25,884 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:08:25,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:08:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:08:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:08:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:08:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:08:25,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-08-18 12:08:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:08:25,888 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:08:25,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:08:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:08:25,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:08:25,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:08:25,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:08:25,925 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 12:08:25,925 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:08:25,925 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:08:25,926 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:08:25,926 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:08:25,926 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:08:25,926 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-18 12:08:25,926 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-18 12:08:25,926 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-18 12:08:25,926 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-18 12:08:25,927 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-18 12:08:25,927 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-18 12:08:25,927 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-18 12:08:25,927 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-18 12:08:25,927 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-18 12:08:25,927 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-18 12:08:25,928 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-18 12:08:25,929 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-08-18 12:08:25,929 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-18 12:08:25,929 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-18 12:08:25,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:08:25 BoogieIcfgContainer [2020-08-18 12:08:25,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:08:25,951 INFO L168 Benchmark]: Toolchain (without parser) took 5013.23 ms. Allocated memory was 140.0 MB in the beginning and 289.9 MB in the end (delta: 149.9 MB). Free memory was 104.0 MB in the beginning and 253.0 MB in the end (delta: -149.0 MB). Peak memory consumption was 967.5 kB. Max. memory is 7.1 GB. [2020-08-18 12:08:25,952 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:08:25,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:08:25,958 INFO L168 Benchmark]: Boogie Preprocessor took 30.53 ms. Allocated memory is still 140.0 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:08:25,959 INFO L168 Benchmark]: RCFGBuilder took 317.94 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 171.3 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:08:25,960 INFO L168 Benchmark]: TraceAbstraction took 4408.46 ms. Allocated memory was 202.9 MB in the beginning and 289.9 MB in the end (delta: 87.0 MB). Free memory was 171.3 MB in the beginning and 253.0 MB in the end (delta: -81.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:08:25,967 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.53 ms. Allocated memory is still 140.0 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.94 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 171.3 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4408.46 ms. Allocated memory was 202.9 MB in the beginning and 289.9 MB in the end (delta: 87.0 MB). Free memory was 171.3 MB in the beginning and 253.0 MB in the end (delta: -81.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 165 SDslu, 431 SDs, 0 SdLazy, 340 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 82680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 760/1210 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...