/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/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:07:57,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:07:57,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:07:57,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:07:57,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:07:57,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:07:57,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:07:57,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:07:57,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:07:57,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:07:57,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:07:57,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:07:57,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:07:57,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:07:57,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:07:57,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:07:57,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:07:57,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:07:57,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:07:57,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:07:57,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:07:57,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:07:57,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:07:57,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:07:57,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:07:57,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:07:57,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:07:57,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:07:57,626 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 22:07:57,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:07:57,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:07:57,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:07:57,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:07:57,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:07:57,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:07:57,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:07:57,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:07:57,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:07:57,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:07:57,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:07:57,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:07:57,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:07:57,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:07:57,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:07:57,639 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:07:57,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:07:57,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:07:57,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:07:57,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:07:57,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:07:57,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:07:57,641 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 22:07:57,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:07:58,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:07:58,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:07:58,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:07:58,010 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:07:58,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-22 22:07:58,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb056a868/b8e82c9ece6845c3b0274f9085307a0d/FLAG4618242cf [2020-08-22 22:07:58,575 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:07:58,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-22 22:07:58,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb056a868/b8e82c9ece6845c3b0274f9085307a0d/FLAG4618242cf [2020-08-22 22:07:58,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb056a868/b8e82c9ece6845c3b0274f9085307a0d [2020-08-22 22:07:58,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:07:58,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:07:58,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:07:58,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:07:58,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:07:58,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:07:58" (1/1) ... [2020-08-22 22:07:58,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e229b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:58, skipping insertion in model container [2020-08-22 22:07:58,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:07:58" (1/1) ... [2020-08-22 22:07:58,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:07:58,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:07:59,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:07:59,154 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:07:59,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:07:59,187 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:07:59,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59 WrapperNode [2020-08-22 22:07:59,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:07:59,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:07:59,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:07:59,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:07:59,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (1/1) ... [2020-08-22 22:07:59,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:07:59,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:07:59,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:07:59,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:07:59,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (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 22:07:59,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:07:59,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:07:59,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 22:07:59,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 22:07:59,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:07:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:07:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:07:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 22:07:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 22:07:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:07:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:07:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:07:59,631 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:07:59,631 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:07:59,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:07:59 BoogieIcfgContainer [2020-08-22 22:07:59,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:07:59,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:07:59,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:07:59,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:07:59,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:07:58" (1/3) ... [2020-08-22 22:07:59,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a75bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:07:59, skipping insertion in model container [2020-08-22 22:07:59,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:07:59" (2/3) ... [2020-08-22 22:07:59,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a75bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:07:59, skipping insertion in model container [2020-08-22 22:07:59,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:07:59" (3/3) ... [2020-08-22 22:07:59,647 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-22 22:07:59,660 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:07:59,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:07:59,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:07:59,712 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:07:59,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:07:59,713 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:07:59,713 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:07:59,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:07:59,714 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:07:59,714 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:07:59,714 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:07:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 22:07:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:07:59,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:07:59,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:07:59,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:07:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:07:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-08-22 22:07:59,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:07:59,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451760104] [2020-08-22 22:07:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:07:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:07:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:07:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:07:59,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:07:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,057 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 22:08:00,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451760104] [2020-08-22 22:08:00,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:00,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:00,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923090482] [2020-08-22 22:08:00,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:00,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:00,086 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-08-22 22:08:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:00,236 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-08-22 22:08:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:00,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:08:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:00,253 INFO L225 Difference]: With dead ends: 58 [2020-08-22 22:08:00,253 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 22:08:00,258 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 [2020-08-22 22:08:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 22:08:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 22:08:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:08:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:08:00,325 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-08-22 22:08:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:00,326 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:08:00,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:08:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:08:00,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:00,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:00,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:08:00,333 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-08-22 22:08:00,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:00,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7465742] [2020-08-22 22:08:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,408 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 22:08:00,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7465742] [2020-08-22 22:08:00,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:00,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:00,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197498165] [2020-08-22 22:08:00,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:00,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:00,413 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-08-22 22:08:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:00,499 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 22:08:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:00,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 22:08:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:00,503 INFO L225 Difference]: With dead ends: 50 [2020-08-22 22:08:00,503 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:08:00,505 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 [2020-08-22 22:08:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:08:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:08:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:08:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:08:00,522 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-08-22 22:08:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:00,523 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:08:00,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:08:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 22:08:00,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:00,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1] [2020-08-22 22:08:00,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:08:00,527 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-08-22 22:08:00,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:00,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696166469] [2020-08-22 22:08:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:08:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:08:00,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696166469] [2020-08-22 22:08:00,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:00,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:00,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373828614] [2020-08-22 22:08:00,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:00,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:00,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:00,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:00,717 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-08-22 22:08:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:00,871 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-08-22 22:08:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:08:00,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 22:08:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:00,877 INFO L225 Difference]: With dead ends: 82 [2020-08-22 22:08:00,877 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 22:08:00,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 22:08:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 22:08:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 22:08:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-08-22 22:08:00,901 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-08-22 22:08:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:00,902 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-08-22 22:08:00,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-08-22 22:08:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:08:00,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:00,905 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, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:00,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:08:00,905 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-08-22 22:08:00,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:00,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599891368] [2020-08-22 22:08:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:00,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:08:01,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599891368] [2020-08-22 22:08:01,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:01,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:01,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111970286] [2020-08-22 22:08:01,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:01,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:01,073 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-08-22 22:08:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:01,305 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-08-22 22:08:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:08:01,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-08-22 22:08:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:01,309 INFO L225 Difference]: With dead ends: 74 [2020-08-22 22:08:01,309 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 22:08:01,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:08:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 22:08:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-08-22 22:08:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 22:08:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-08-22 22:08:01,346 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34 [2020-08-22 22:08:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:01,346 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-08-22 22:08:01,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-08-22 22:08:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 22:08:01,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:01,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:01,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:08:01,358 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-08-22 22:08:01,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:01,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022412927] [2020-08-22 22:08:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:08:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 22:08:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 22:08:01,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022412927] [2020-08-22 22:08:01,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:01,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:08:01,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077271350] [2020-08-22 22:08:01,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:08:01,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:08:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:08:01,495 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-08-22 22:08:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:01,591 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-08-22 22:08:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:08:01,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-08-22 22:08:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:01,594 INFO L225 Difference]: With dead ends: 130 [2020-08-22 22:08:01,594 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 22:08:01,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 22:08:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 22:08:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 22:08:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-22 22:08:01,614 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2020-08-22 22:08:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:01,614 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-22 22:08:01,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:08:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-22 22:08:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:08:01,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:01,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:01,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:08:01,619 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-08-22 22:08:01,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:01,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283787872] [2020-08-22 22:08:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 22:08:01,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283787872] [2020-08-22 22:08:01,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:01,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:01,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472428288] [2020-08-22 22:08:01,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:01,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:01,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:01,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:01,793 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states. [2020-08-22 22:08:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:01,944 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2020-08-22 22:08:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:08:01,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 22:08:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:01,948 INFO L225 Difference]: With dead ends: 142 [2020-08-22 22:08:01,948 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 22:08:01,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 22:08:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-08-22 22:08:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 22:08:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-08-22 22:08:01,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2020-08-22 22:08:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:01,973 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-08-22 22:08:01,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-08-22 22:08:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:08:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:01,977 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:01,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:08:01,977 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-08-22 22:08:01,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:01,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980482240] [2020-08-22 22:08:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 22:08:02,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980482240] [2020-08-22 22:08:02,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:02,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:02,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692133594] [2020-08-22 22:08:02,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:02,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:02,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:02,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:02,236 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states. [2020-08-22 22:08:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:02,516 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2020-08-22 22:08:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:08:02,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-22 22:08:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:02,523 INFO L225 Difference]: With dead ends: 118 [2020-08-22 22:08:02,523 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:08:02,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:08:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-08-22 22:08:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-22 22:08:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2020-08-22 22:08:02,576 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52 [2020-08-22 22:08:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:02,577 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2020-08-22 22:08:02,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2020-08-22 22:08:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 22:08:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:02,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:02,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:08:02,584 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times [2020-08-22 22:08:02,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:02,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450411524] [2020-08-22 22:08:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 22:08:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:08:02,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450411524] [2020-08-22 22:08:02,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:02,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:02,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218265635] [2020-08-22 22:08:02,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:02,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:02,856 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states. [2020-08-22 22:08:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:03,022 INFO L93 Difference]: Finished difference Result 227 states and 348 transitions. [2020-08-22 22:08:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:08:03,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-08-22 22:08:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:03,027 INFO L225 Difference]: With dead ends: 227 [2020-08-22 22:08:03,027 INFO L226 Difference]: Without dead ends: 127 [2020-08-22 22:08:03,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-22 22:08:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-08-22 22:08:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-08-22 22:08:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-08-22 22:08:03,057 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69 [2020-08-22 22:08:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:03,058 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-08-22 22:08:03,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-08-22 22:08:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 22:08:03,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:03,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:03,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:08:03,061 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times [2020-08-22 22:08:03,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:03,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118999315] [2020-08-22 22:08:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 22:08:03,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118999315] [2020-08-22 22:08:03,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:03,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:03,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956649433] [2020-08-22 22:08:03,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:03,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:03,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:03,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:03,252 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states. [2020-08-22 22:08:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:03,520 INFO L93 Difference]: Finished difference Result 257 states and 400 transitions. [2020-08-22 22:08:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:08:03,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-22 22:08:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:03,527 INFO L225 Difference]: With dead ends: 257 [2020-08-22 22:08:03,527 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 22:08:03,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 22:08:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-08-22 22:08:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 22:08:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2020-08-22 22:08:03,568 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70 [2020-08-22 22:08:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:03,568 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2020-08-22 22:08:03,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2020-08-22 22:08:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 22:08:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:03,573 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:03,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:08:03,573 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times [2020-08-22 22:08:03,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:03,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601591608] [2020-08-22 22:08:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-22 22:08:03,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601591608] [2020-08-22 22:08:03,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:03,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:08:03,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942812488] [2020-08-22 22:08:03,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:08:03,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:08:03,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:08:03,942 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states. [2020-08-22 22:08:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:04,427 INFO L93 Difference]: Finished difference Result 265 states and 420 transitions. [2020-08-22 22:08:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:08:04,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-08-22 22:08:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:04,432 INFO L225 Difference]: With dead ends: 265 [2020-08-22 22:08:04,433 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 22:08:04,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:08:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 22:08:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-08-22 22:08:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 22:08:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-22 22:08:04,455 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 105 [2020-08-22 22:08:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:04,455 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-22 22:08:04,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:08:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-22 22:08:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 22:08:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:04,458 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:04,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:08:04,459 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1534580400, now seen corresponding path program 1 times [2020-08-22 22:08:04,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:04,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865114935] [2020-08-22 22:08:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 22:08:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 50 proven. 67 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-08-22 22:08:04,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865114935] [2020-08-22 22:08:04,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:04,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:04,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935007242] [2020-08-22 22:08:04,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:04,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:04,725 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 10 states. [2020-08-22 22:08:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:04,994 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2020-08-22 22:08:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:08:04,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-08-22 22:08:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:04,997 INFO L225 Difference]: With dead ends: 193 [2020-08-22 22:08:04,997 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:08:04,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:08:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-22 22:08:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 22:08:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-08-22 22:08:05,019 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 123 [2020-08-22 22:08:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:05,020 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-08-22 22:08:05,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-08-22 22:08:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 22:08:05,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:05,023 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:05,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:08:05,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash 822116120, now seen corresponding path program 2 times [2020-08-22 22:08:05,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:05,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843919355] [2020-08-22 22:08:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 22:08:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 72 proven. 111 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-22 22:08:05,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843919355] [2020-08-22 22:08:05,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:05,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:08:05,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570268886] [2020-08-22 22:08:05,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:08:05,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:08:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:08:05,390 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 12 states. [2020-08-22 22:08:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:05,828 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2020-08-22 22:08:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:08:05,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 140 [2020-08-22 22:08:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:05,831 INFO L225 Difference]: With dead ends: 241 [2020-08-22 22:08:05,831 INFO L226 Difference]: Without dead ends: 141 [2020-08-22 22:08:05,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:08:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-22 22:08:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-08-22 22:08:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 22:08:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-08-22 22:08:05,853 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 140 [2020-08-22 22:08:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:05,854 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-08-22 22:08:05,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:08:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-08-22 22:08:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 22:08:05,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:05,857 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:05,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:08:05,858 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:05,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1260071360, now seen corresponding path program 2 times [2020-08-22 22:08:05,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:05,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307410063] [2020-08-22 22:08:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:05,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-08-22 22:08:06,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307410063] [2020-08-22 22:08:06,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:06,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:06,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753321285] [2020-08-22 22:08:06,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:06,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:06,094 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 10 states. [2020-08-22 22:08:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:06,382 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2020-08-22 22:08:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:08:06,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-08-22 22:08:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:06,387 INFO L225 Difference]: With dead ends: 244 [2020-08-22 22:08:06,387 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 22:08:06,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:08:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 22:08:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 213. [2020-08-22 22:08:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 22:08:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 287 transitions. [2020-08-22 22:08:06,422 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 287 transitions. Word has length 140 [2020-08-22 22:08:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:06,423 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 287 transitions. [2020-08-22 22:08:06,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 287 transitions. [2020-08-22 22:08:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 22:08:06,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:06,427 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:06,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:08:06,427 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash -88380307, now seen corresponding path program 3 times [2020-08-22 22:08:06,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:06,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112309413] [2020-08-22 22:08:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 179 proven. 163 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-22 22:08:06,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112309413] [2020-08-22 22:08:06,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:06,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:08:06,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551065614] [2020-08-22 22:08:06,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:08:06,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:08:06,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:06,878 INFO L87 Difference]: Start difference. First operand 213 states and 287 transitions. Second operand 14 states. [2020-08-22 22:08:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:07,433 INFO L93 Difference]: Finished difference Result 470 states and 677 transitions. [2020-08-22 22:08:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:08:07,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-08-22 22:08:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:07,439 INFO L225 Difference]: With dead ends: 470 [2020-08-22 22:08:07,440 INFO L226 Difference]: Without dead ends: 257 [2020-08-22 22:08:07,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:08:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-08-22 22:08:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 233. [2020-08-22 22:08:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-08-22 22:08:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 310 transitions. [2020-08-22 22:08:07,478 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 310 transitions. Word has length 193 [2020-08-22 22:08:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:07,479 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 310 transitions. [2020-08-22 22:08:07,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:08:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 310 transitions. [2020-08-22 22:08:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-08-22 22:08:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:07,485 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:07,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:08:07,485 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1293350858, now seen corresponding path program 4 times [2020-08-22 22:08:07,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:07,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577075179] [2020-08-22 22:08:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 22:08:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:07,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 199 proven. 672 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-08-22 22:08:08,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577075179] [2020-08-22 22:08:08,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:08,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:08:08,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253800107] [2020-08-22 22:08:08,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:08:08,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:08:08,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:08,210 INFO L87 Difference]: Start difference. First operand 233 states and 310 transitions. Second operand 14 states. [2020-08-22 22:08:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:08,788 INFO L93 Difference]: Finished difference Result 534 states and 785 transitions. [2020-08-22 22:08:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:08:08,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 351 [2020-08-22 22:08:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:08,795 INFO L225 Difference]: With dead ends: 534 [2020-08-22 22:08:08,795 INFO L226 Difference]: Without dead ends: 301 [2020-08-22 22:08:08,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:08:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-08-22 22:08:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 265. [2020-08-22 22:08:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 22:08:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 352 transitions. [2020-08-22 22:08:08,834 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 352 transitions. Word has length 351 [2020-08-22 22:08:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:08,834 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 352 transitions. [2020-08-22 22:08:08,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:08:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 352 transitions. [2020-08-22 22:08:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-08-22 22:08:08,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:08,840 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:08,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:08:08,840 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2113087688, now seen corresponding path program 5 times [2020-08-22 22:08:08,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:08,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497229892] [2020-08-22 22:08:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1423 backedges. 261 proven. 446 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-08-22 22:08:09,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497229892] [2020-08-22 22:08:09,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:09,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:08:09,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815962695] [2020-08-22 22:08:09,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:08:09,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:09,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:08:09,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:08:09,691 INFO L87 Difference]: Start difference. First operand 265 states and 352 transitions. Second operand 16 states. [2020-08-22 22:08:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:10,578 INFO L93 Difference]: Finished difference Result 487 states and 692 transitions. [2020-08-22 22:08:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 22:08:10,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 281 [2020-08-22 22:08:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:10,586 INFO L225 Difference]: With dead ends: 487 [2020-08-22 22:08:10,586 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 22:08:10,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:08:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 22:08:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2020-08-22 22:08:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-08-22 22:08:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2020-08-22 22:08:10,618 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 281 [2020-08-22 22:08:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:10,618 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2020-08-22 22:08:10,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:08:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2020-08-22 22:08:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-08-22 22:08:10,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:10,623 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:10,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:08:10,623 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1117162661, now seen corresponding path program 6 times [2020-08-22 22:08:10,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:10,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441780168] [2020-08-22 22:08:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:08:10,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:08:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:08:10,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:08:10,766 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:08:10,766 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:08:10,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:08:10,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:08:10 BoogieIcfgContainer [2020-08-22 22:08:10,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:08:10,846 INFO L168 Benchmark]: Toolchain (without parser) took 11904.96 ms. Allocated memory was 144.2 MB in the beginning and 470.8 MB in the end (delta: 326.6 MB). Free memory was 101.5 MB in the beginning and 226.0 MB in the end (delta: -124.5 MB). Peak memory consumption was 202.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,852 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 144.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.99 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,853 INFO L168 Benchmark]: Boogie Preprocessor took 148.52 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,855 INFO L168 Benchmark]: RCFGBuilder took 299.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 166.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,857 INFO L168 Benchmark]: TraceAbstraction took 11203.18 ms. Allocated memory was 202.4 MB in the beginning and 470.8 MB in the end (delta: 268.4 MB). Free memory was 166.1 MB in the beginning and 226.0 MB in the end (delta: -59.9 MB). Peak memory consumption was 208.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:10,863 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 144.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.99 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.52 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 166.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11203.18 ms. Allocated memory was 202.4 MB in the beginning and 470.8 MB in the end (delta: 268.4 MB). Free memory was 166.1 MB in the beginning and 226.0 MB in the end (delta: -59.9 MB). Peak memory consumption was 208.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; VAL [x=6] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=4, \result=3, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=5, \result=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=6, \result=8, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L37] int result = fibo1(x); VAL [fibo1(x)=8, result=8, x=6] [L38] COND TRUE result == 8 VAL [result=8, x=6] [L39] __VERIFIER_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 17, TraceHistogramMax: 21, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 747 SDtfs, 926 SDslu, 3923 SDs, 0 SdLazy, 3295 SolverSat, 376 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 199 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1953 NumberOfCodeBlocks, 1953 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1709 ConstructedInterpolants, 0 QuantifiedInterpolants, 521295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 3765/5449 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...