/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:10:12,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:10:12,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:10:12,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:10:12,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:10:12,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:10:12,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:10:12,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:10:12,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:10:12,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:10:12,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:10:12,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:10:12,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:10:12,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:10:12,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:10:12,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:10:12,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:10:12,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:10:12,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:10:12,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:10:12,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:10:12,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:10:12,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:10:12,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:10:12,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:10:12,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:10:12,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:10:12,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:10:12,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:10:12,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:10:12,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:10:12,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:10:12,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:10:12,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:10:12,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:10:12,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:10:12,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:10:12,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:10:12,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:10:12,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:10:12,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:10:12,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:10:12,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:10:12,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:10:12,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:10:12,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:10:12,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:10:12,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:10:12,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:10:12,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:10:12,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:10:12,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:10:12,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:10:12,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:10:12,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:10:12,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:10:12,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:10:12,515 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:10:12,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:10:12,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:10:12,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:10:12,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:10:12,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:10:12,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:10:12,516 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:10:12,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:10:12,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:10:12,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:10:12,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:10:12,843 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:10:12,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-08-22 22:10:12,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246063b07/d4e2b78dc6c5412980c3d64235b91840/FLAG722ef09d8 [2020-08-22 22:10:13,377 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:10:13,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-08-22 22:10:13,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246063b07/d4e2b78dc6c5412980c3d64235b91840/FLAG722ef09d8 [2020-08-22 22:10:13,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246063b07/d4e2b78dc6c5412980c3d64235b91840 [2020-08-22 22:10:13,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:10:13,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:10:13,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:13,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:10:13,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:10:13,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:13,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1806b88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13, skipping insertion in model container [2020-08-22 22:10:13,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:13,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:10:13,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:10:13,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:13,962 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:10:13,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:13,987 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:10:13,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13 WrapperNode [2020-08-22 22:10:13,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:13,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:10:13,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:10:13,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:10:13,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:13,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... [2020-08-22 22:10:14,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:10:14,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:10:14,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:10:14,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:10:14,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 22:10:14,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:10:14,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:10:14,156 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:10:14,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:10:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:10:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:10:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:10:14,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:10:14,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:10:14,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:10:14,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:10:14,335 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:10:14,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:14 BoogieIcfgContainer [2020-08-22 22:10:14,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:10:14,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:10:14,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:10:14,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:10:14,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:10:13" (1/3) ... [2020-08-22 22:10:14,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661bcdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:14, skipping insertion in model container [2020-08-22 22:10:14,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:13" (2/3) ... [2020-08-22 22:10:14,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661bcdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:14, skipping insertion in model container [2020-08-22 22:10:14,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:14" (3/3) ... [2020-08-22 22:10:14,348 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-08-22 22:10:14,360 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:10:14,367 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:10:14,386 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:10:14,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:10:14,412 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:10:14,413 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:10:14,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:10:14,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:10:14,413 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:10:14,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:10:14,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:10:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-22 22:10:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 22:10:14,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:14,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:14,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-08-22 22:10:14,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:14,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381644949] [2020-08-22 22:10:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:10:14,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381644949] [2020-08-22 22:10:14,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:14,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:14,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364514948] [2020-08-22 22:10:14,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:14,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:14,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:14,702 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-08-22 22:10:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:14,780 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-08-22 22:10:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:14,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 22:10:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:14,794 INFO L225 Difference]: With dead ends: 44 [2020-08-22 22:10:14,794 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 22:10:14,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 22:10:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 22:10:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:10:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-22 22:10:14,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-08-22 22:10:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:14,852 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-22 22:10:14,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-22 22:10:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 22:10:14,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:14,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:14,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:10:14,859 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-08-22 22:10:14,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:14,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733172699] [2020-08-22 22:10:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:14,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:10:15,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733172699] [2020-08-22 22:10:15,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:15,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:15,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173902987] [2020-08-22 22:10:15,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:15,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:15,042 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-08-22 22:10:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:15,103 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-08-22 22:10:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:15,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 22:10:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:15,107 INFO L225 Difference]: With dead ends: 49 [2020-08-22 22:10:15,107 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 22:10:15,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 22:10:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-08-22 22:10:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 22:10:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 22:10:15,119 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-08-22 22:10:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:15,119 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 22:10:15,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 22:10:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 22:10:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:15,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:15,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:10:15,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-08-22 22:10:15,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:15,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430244142] [2020-08-22 22:10:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:10:15,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430244142] [2020-08-22 22:10:15,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:15,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:10:15,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223493791] [2020-08-22 22:10:15,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:10:15,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:10:15,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:15,264 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-08-22 22:10:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:15,388 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-08-22 22:10:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:10:15,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-22 22:10:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:15,392 INFO L225 Difference]: With dead ends: 41 [2020-08-22 22:10:15,392 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 22:10:15,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:10:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 22:10:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-22 22:10:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 22:10:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-08-22 22:10:15,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-08-22 22:10:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:15,413 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-08-22 22:10:15,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:10:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-08-22 22:10:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 22:10:15,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:15,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:15,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:10:15,415 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-08-22 22:10:15,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:15,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600747888] [2020-08-22 22:10:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 22:10:15,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600747888] [2020-08-22 22:10:15,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:15,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:15,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88736510] [2020-08-22 22:10:15,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:15,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:15,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:15,596 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-08-22 22:10:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:15,632 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-08-22 22:10:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:15,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 22:10:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:15,635 INFO L225 Difference]: With dead ends: 43 [2020-08-22 22:10:15,635 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 22:10:15,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 22:10:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-08-22 22:10:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 22:10:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-08-22 22:10:15,658 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38 [2020-08-22 22:10:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:15,658 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-08-22 22:10:15,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-08-22 22:10:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 22:10:15,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:15,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:15,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:10:15,661 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-08-22 22:10:15,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:15,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124055696] [2020-08-22 22:10:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:10:15,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124055696] [2020-08-22 22:10:15,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:15,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:10:15,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378389033] [2020-08-22 22:10:15,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:10:15,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:15,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:10:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:10:15,826 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-08-22 22:10:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:15,973 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-08-22 22:10:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:10:15,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-08-22 22:10:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:15,975 INFO L225 Difference]: With dead ends: 64 [2020-08-22 22:10:15,975 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:10:15,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:10:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:10:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:10:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:10:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 22:10:15,986 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-08-22 22:10:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:15,987 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 22:10:15,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:10:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 22:10:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:10:15,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:15,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:15,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:10:15,989 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1045014785, now seen corresponding path program 3 times [2020-08-22 22:10:15,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:15,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877576401] [2020-08-22 22:10:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 22:10:16,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877576401] [2020-08-22 22:10:16,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:16,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:10:16,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203726744] [2020-08-22 22:10:16,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:10:16,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:10:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:16,271 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-08-22 22:10:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,453 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-08-22 22:10:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:10:16,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-22 22:10:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,457 INFO L225 Difference]: With dead ends: 71 [2020-08-22 22:10:16,457 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 22:10:16,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:10:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 22:10:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-22 22:10:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 22:10:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-08-22 22:10:16,477 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 48 [2020-08-22 22:10:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:16,481 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-08-22 22:10:16,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:10:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-08-22 22:10:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:10:16,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:16,487 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:16,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:10:16,490 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash 485800496, now seen corresponding path program 4 times [2020-08-22 22:10:16,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:16,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143865512] [2020-08-22 22:10:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:10:16,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143865512] [2020-08-22 22:10:16,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:10:16,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021273601] [2020-08-22 22:10:16,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:10:16,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:10:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:10:16,825 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-08-22 22:10:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,997 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-08-22 22:10:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:10:16,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-08-22 22:10:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,999 INFO L225 Difference]: With dead ends: 78 [2020-08-22 22:10:17,000 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 22:10:17,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:10:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 22:10:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-08-22 22:10:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 22:10:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-08-22 22:10:17,011 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 58 [2020-08-22 22:10:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:17,011 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-08-22 22:10:17,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:10:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-08-22 22:10:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 22:10:17,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:17,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:17,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:10:17,013 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1938626529, now seen corresponding path program 5 times [2020-08-22 22:10:17,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:17,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506129246] [2020-08-22 22:10:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:10:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 22:10:17,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506129246] [2020-08-22 22:10:17,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:17,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:10:17,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059822851] [2020-08-22 22:10:17,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:10:17,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:10:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:10:17,337 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2020-08-22 22:10:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:17,553 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-08-22 22:10:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:10:17,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-08-22 22:10:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:17,554 INFO L225 Difference]: With dead ends: 76 [2020-08-22 22:10:17,554 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:10:17,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:10:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:10:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:10:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:10:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:10:17,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2020-08-22 22:10:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:17,557 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:10:17,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:10:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:10:17,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:10:17,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:10:17,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:10:17,770 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,771 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,771 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,771 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,771 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,771 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:10:17,772 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: false [2020-08-22 22:10:17,772 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-08-22 22:10:17,772 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 17) the Hoare annotation is: true [2020-08-22 22:10:17,772 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-08-22 22:10:17,773 INFO L264 CegarLoopResult]: At program point L14(lines 14 16) the Hoare annotation is: (<= main_~result~0 5) [2020-08-22 22:10:17,773 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-08-22 22:10:17,773 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-08-22 22:10:17,773 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-08-22 22:10:17,773 INFO L271 CegarLoopResult]: At program point L14-2(lines 11 17) the Hoare annotation is: true [2020-08-22 22:10:17,773 INFO L271 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-08-22 22:10:17,774 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-08-22 22:10:17,774 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~result~0 5)) [2020-08-22 22:10:17,774 INFO L264 CegarLoopResult]: At program point idFINAL(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-08-22 22:10:17,774 INFO L264 CegarLoopResult]: At program point idEXIT(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-08-22 22:10:17,774 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-08-22 22:10:17,775 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (<= id_~ret~0 5) [2020-08-22 22:10:17,775 INFO L271 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-08-22 22:10:17,775 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-08-22 22:10:17,775 INFO L271 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-08-22 22:10:17,775 INFO L271 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: true [2020-08-22 22:10:17,775 INFO L271 CegarLoopResult]: At program point L6-1(line 6) the Hoare annotation is: true [2020-08-22 22:10:17,776 INFO L271 CegarLoopResult]: At program point L5-1(line 5) the Hoare annotation is: true [2020-08-22 22:10:17,776 INFO L271 CegarLoopResult]: At program point L6-2(line 6) the Hoare annotation is: true [2020-08-22 22:10:17,776 INFO L271 CegarLoopResult]: At program point L6-3(line 6) the Hoare annotation is: true [2020-08-22 22:10:17,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:10:17 BoogieIcfgContainer [2020-08-22 22:10:17,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:10:17,799 INFO L168 Benchmark]: Toolchain (without parser) took 4022.40 ms. Allocated memory was 144.7 MB in the beginning and 248.5 MB in the end (delta: 103.8 MB). Free memory was 101.7 MB in the beginning and 172.1 MB in the end (delta: -70.4 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,800 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.91 ms. Allocated memory is still 144.7 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,802 INFO L168 Benchmark]: Boogie Preprocessor took 106.79 ms. Allocated memory was 144.7 MB in the beginning and 200.3 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 179.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,803 INFO L168 Benchmark]: RCFGBuilder took 244.72 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,804 INFO L168 Benchmark]: TraceAbstraction took 3455.34 ms. Allocated memory was 200.3 MB in the beginning and 248.5 MB in the end (delta: 48.2 MB). Free memory was 165.6 MB in the beginning and 172.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:17,807 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 210.91 ms. Allocated memory is still 144.7 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.79 ms. Allocated memory was 144.7 MB in the beginning and 200.3 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 179.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.72 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3455.34 ms. Allocated memory was 200.3 MB in the beginning and 248.5 MB in the end (delta: 48.2 MB). Free memory was 165.6 MB in the beginning and 172.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for id Derived contract for procedure id: \result <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 76 SDslu, 1103 SDs, 0 SdLazy, 398 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 42 PreInvPairs, 178 NumberOfFragments, 48 HoareAnnotationTreeSize, 42 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 30 FomulaSimplificationsInter, 227 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 29494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 111/281 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...