/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/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:22:24,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:22:24,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:22:24,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:22:24,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:22:24,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:22:24,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:22:24,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:22:24,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:22:24,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:22:24,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:22:24,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:22:24,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:22:24,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:22:24,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:22:24,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:22:24,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:22:24,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:22:24,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:22:24,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:22:24,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:22:24,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:22:24,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:22:24,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:22:24,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:22:24,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:22:24,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:22:24,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:22:24,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:22:24,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 17:22:24,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:22:24,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:22:24,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:22:24,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:22:24,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:22:24,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:22:24,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:22:24,394 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:22:24,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:22:24,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:22:24,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:22:24,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:22:24,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:22:24,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:22:24,396 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:22:24,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:22:24,396 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:22:24,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:22:24,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:22:24,397 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:22:24,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:22:24,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:22:24,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:22:24,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:22:24,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:22:24,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:22:24,398 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 [2020-07-17 17:22:24,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:22:24,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:22:24,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:22:24,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:22:24,668 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:22:24,669 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-07-17 17:22:24,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13e4de4f/7ee37daf88da43a8bbea77256e226eab/FLAG4a96f88a2 [2020-07-17 17:22:25,135 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:22:25,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-07-17 17:22:25,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13e4de4f/7ee37daf88da43a8bbea77256e226eab/FLAG4a96f88a2 [2020-07-17 17:22:25,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13e4de4f/7ee37daf88da43a8bbea77256e226eab [2020-07-17 17:22:25,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:22:25,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:22:25,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:25,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:22:25,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:22:25,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c053451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25, skipping insertion in model container [2020-07-17 17:22:25,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:22:25,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:22:25,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:25,758 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:22:25,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:25,785 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:22:25,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25 WrapperNode [2020-07-17 17:22:25,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:25,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:22:25,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:22:25,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:22:25,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (1/1) ... [2020-07-17 17:22:25,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:22:25,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:22:25,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:22:25,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:22:25,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (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 [2020-07-17 17:22:25,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:22:25,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:22:25,958 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-17 17:22:25,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:22:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:22:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-17 17:22:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:22:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:22:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:22:26,127 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:22:26,128 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:22:26,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:26 BoogieIcfgContainer [2020-07-17 17:22:26,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:22:26,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:22:26,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:22:26,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:22:26,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:22:25" (1/3) ... [2020-07-17 17:22:26,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ed52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:26, skipping insertion in model container [2020-07-17 17:22:26,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:25" (2/3) ... [2020-07-17 17:22:26,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ed52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:26, skipping insertion in model container [2020-07-17 17:22:26,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:26" (3/3) ... [2020-07-17 17:22:26,140 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-07-17 17:22:26,151 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:22:26,159 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:22:26,174 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:22:26,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:22:26,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:22:26,228 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:22:26,229 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:22:26,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:22:26,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:22:26,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:22:26,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:22:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-17 17:22:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:22:26,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:26,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:26,280 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-07-17 17:22:26,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:26,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824688424] [2020-07-17 17:22:26,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:22:26,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824688424] [2020-07-17 17:22:26,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:22:26,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:22:26,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860464767] [2020-07-17 17:22:26,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:22:26,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:22:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:22:26,592 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-17 17:22:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:26,744 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-17 17:22:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:22:26,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 17:22:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:26,764 INFO L225 Difference]: With dead ends: 39 [2020-07-17 17:22:26,764 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 17:22:26,773 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 [2020-07-17 17:22:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 17:22:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 17:22:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 17:22:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-17 17:22:26,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-07-17 17:22:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:26,843 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-17 17:22:26,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:22:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-17 17:22:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 17:22:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:26,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:26,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:22:26,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-07-17 17:22:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:26,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876995208] [2020-07-17 17:22:26,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 17:22:27,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876995208] [2020-07-17 17:22:27,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:27,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:22:27,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789597960] [2020-07-17 17:22:27,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:22:27,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:27,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:22:27,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:27,013 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-07-17 17:22:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:27,095 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-07-17 17:22:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:22:27,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-17 17:22:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:27,098 INFO L225 Difference]: With dead ends: 36 [2020-07-17 17:22:27,098 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 17:22:27,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 17:22:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 17:22:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 17:22:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 17:22:27,123 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-07-17 17:22:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:27,124 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 17:22:27,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:22:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 17:22:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 17:22:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:27,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:27,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:22:27,130 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-07-17 17:22:27,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:27,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164809858] [2020-07-17 17:22:27,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-17 17:22:27,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164809858] [2020-07-17 17:22:27,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:27,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:22:27,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981565320] [2020-07-17 17:22:27,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:22:27,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:27,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:22:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:22:27,290 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-07-17 17:22:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:27,365 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-07-17 17:22:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:22:27,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-17 17:22:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:27,367 INFO L225 Difference]: With dead ends: 41 [2020-07-17 17:22:27,367 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:22:27,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:22:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 17:22:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:22:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-17 17:22:27,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 36 [2020-07-17 17:22:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:27,380 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-17 17:22:27,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:22:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-17 17:22:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-17 17:22:27,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:27,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:27,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:22:27,383 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1021564803, now seen corresponding path program 3 times [2020-07-17 17:22:27,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:27,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617203457] [2020-07-17 17:22:27,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-17 17:22:27,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617203457] [2020-07-17 17:22:27,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:27,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:22:27,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394825477] [2020-07-17 17:22:27,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:22:27,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:22:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:27,555 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 8 states. [2020-07-17 17:22:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:27,638 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 17:22:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:22:27,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-17 17:22:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:27,640 INFO L225 Difference]: With dead ends: 46 [2020-07-17 17:22:27,640 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 17:22:27,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 17:22:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-17 17:22:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 17:22:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-07-17 17:22:27,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 45 [2020-07-17 17:22:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:27,652 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-07-17 17:22:27,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:22:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-07-17 17:22:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-17 17:22:27,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:27,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:27,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:22:27,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -263249715, now seen corresponding path program 4 times [2020-07-17 17:22:27,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:27,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130804003] [2020-07-17 17:22:27,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-17 17:22:27,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130804003] [2020-07-17 17:22:27,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:27,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:22:27,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963028290] [2020-07-17 17:22:27,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:22:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:22:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:22:27,843 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2020-07-17 17:22:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:27,927 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-07-17 17:22:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:22:27,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-07-17 17:22:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:27,929 INFO L225 Difference]: With dead ends: 51 [2020-07-17 17:22:27,930 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 17:22:27,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 17:22:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 17:22:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 17:22:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 17:22:27,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 54 [2020-07-17 17:22:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:27,941 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 17:22:27,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:22:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 17:22:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-17 17:22:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:27,943 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:27,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:22:27,943 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1884999187, now seen corresponding path program 5 times [2020-07-17 17:22:27,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:27,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44555620] [2020-07-17 17:22:27,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-17 17:22:28,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44555620] [2020-07-17 17:22:28,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:28,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:22:28,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369590593] [2020-07-17 17:22:28,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:22:28,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:22:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:28,148 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 10 states. [2020-07-17 17:22:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:28,276 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-07-17 17:22:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:22:28,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-07-17 17:22:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:28,279 INFO L225 Difference]: With dead ends: 56 [2020-07-17 17:22:28,279 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 17:22:28,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:22:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 17:22:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-17 17:22:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 17:22:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-17 17:22:28,291 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 63 [2020-07-17 17:22:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:28,291 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-17 17:22:28,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:22:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-17 17:22:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 17:22:28,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:28,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:28,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:22:28,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:28,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash -441437769, now seen corresponding path program 6 times [2020-07-17 17:22:28,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:28,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887847165] [2020-07-17 17:22:28,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-17 17:22:28,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887847165] [2020-07-17 17:22:28,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:28,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:22:28,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582357640] [2020-07-17 17:22:28,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:22:28,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:22:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:22:28,590 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-07-17 17:22:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:28,726 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-17 17:22:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:22:28,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-07-17 17:22:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:28,728 INFO L225 Difference]: With dead ends: 61 [2020-07-17 17:22:28,728 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 17:22:28,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:22:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 17:22:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-17 17:22:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 17:22:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-17 17:22:28,744 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 72 [2020-07-17 17:22:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:28,744 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-17 17:22:28,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:22:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-17 17:22:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-17 17:22:28,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:28,746 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:28,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:22:28,746 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 999943849, now seen corresponding path program 7 times [2020-07-17 17:22:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809268600] [2020-07-17 17:22:28,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-17 17:22:28,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809268600] [2020-07-17 17:22:28,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:28,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:22:28,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216008779] [2020-07-17 17:22:28,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:22:28,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:22:28,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:28,994 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 12 states. [2020-07-17 17:22:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:29,117 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-07-17 17:22:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:22:29,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-07-17 17:22:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:29,120 INFO L225 Difference]: With dead ends: 66 [2020-07-17 17:22:29,120 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 17:22:29,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:22:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 17:22:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-17 17:22:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 17:22:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 17:22:29,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 81 [2020-07-17 17:22:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:29,131 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 17:22:29,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:22:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 17:22:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-17 17:22:29,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:29,133 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:29,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:22:29,133 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1356134305, now seen corresponding path program 8 times [2020-07-17 17:22:29,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:29,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828809619] [2020-07-17 17:22:29,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-17 17:22:29,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828809619] [2020-07-17 17:22:29,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:29,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:22:29,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808022028] [2020-07-17 17:22:29,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:22:29,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:22:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:22:29,431 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-07-17 17:22:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:29,553 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-07-17 17:22:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:22:29,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-07-17 17:22:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:29,555 INFO L225 Difference]: With dead ends: 71 [2020-07-17 17:22:29,555 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 17:22:29,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:22:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 17:22:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-17 17:22:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-17 17:22:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-07-17 17:22:29,565 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 90 [2020-07-17 17:22:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:29,566 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-07-17 17:22:29,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:22:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-07-17 17:22:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-17 17:22:29,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:29,568 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:29,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:22:29,568 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash -928437697, now seen corresponding path program 9 times [2020-07-17 17:22:29,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:29,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674192369] [2020-07-17 17:22:29,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 17:22:29,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674192369] [2020-07-17 17:22:29,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:29,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:22:29,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660121529] [2020-07-17 17:22:29,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:22:29,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:22:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:29,876 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 14 states. [2020-07-17 17:22:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:30,041 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-17 17:22:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:22:30,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-07-17 17:22:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:30,043 INFO L225 Difference]: With dead ends: 76 [2020-07-17 17:22:30,044 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:22:30,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:22:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:22:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-17 17:22:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 17:22:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-07-17 17:22:30,053 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 99 [2020-07-17 17:22:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:30,054 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-07-17 17:22:30,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:22:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-07-17 17:22:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-17 17:22:30,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:30,056 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:30,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:22:30,056 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash -276966773, now seen corresponding path program 10 times [2020-07-17 17:22:30,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114797458] [2020-07-17 17:22:30,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:30,121 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:22:30,121 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:22:30,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:22:30,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:22:30 BoogieIcfgContainer [2020-07-17 17:22:30,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:22:30,184 INFO L168 Benchmark]: Toolchain (without parser) took 4620.93 ms. Allocated memory was 137.9 MB in the beginning and 285.2 MB in the end (delta: 147.3 MB). Free memory was 103.6 MB in the beginning and 233.0 MB in the end (delta: -129.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,185 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.83 ms. Allocated memory is still 137.9 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,186 INFO L168 Benchmark]: Boogie Preprocessor took 23.82 ms. Allocated memory is still 137.9 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,187 INFO L168 Benchmark]: RCFGBuilder took 320.88 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 170.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,188 INFO L168 Benchmark]: TraceAbstraction took 4047.96 ms. Allocated memory was 202.4 MB in the beginning and 285.2 MB in the end (delta: 82.8 MB). Free memory was 169.7 MB in the beginning and 233.0 MB in the end (delta: -63.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:30,192 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.83 ms. Allocated memory is still 137.9 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.82 ms. Allocated memory is still 137.9 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.88 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 170.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4047.96 ms. Allocated memory was 202.4 MB in the beginning and 285.2 MB in the end (delta: 82.8 MB). Free memory was 169.7 MB in the beginning and 233.0 MB in the end (delta: -63.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 10; VAL [a=10] [L13] int b = 0; VAL [a=10, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L4] COND TRUE n <= 0 VAL [\old(m)=10, \old(n)=0, m=10, n=0] [L5] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=9, \old(n)=1, \result=10, m=9, n=1, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=8, \old(n)=2, \result=10, m=8, n=2, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=7, \old(n)=3, \result=10, m=7, n=3, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=6, \old(n)=4, \result=10, m=6, n=4, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=5, \old(n)=5, \result=10, m=5, n=5, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=4, \old(n)=6, \result=10, m=4, n=6, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=3, \old(n)=7, \result=10, m=3, n=7, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=2, \old(n)=8, \result=10, m=2, n=8, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=1, \old(n)=9, \result=10, m=1, n=9, sum(n - 1, m + 1)=10] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); VAL [\old(m)=0, \old(n)=10, \result=10, m=0, n=10, sum(n - 1, m + 1)=10] [L14] RET, EXPR sum(a, b) VAL [a=10, b=0, sum(a, b)=10] [L14] int result = sum(a, b); VAL [a=10, b=0, result=10, sum(a, b)=10] [L15] COND TRUE result == a + b VAL [a=10, b=0, result=10] [L16] __VERIFIER_error() VAL [a=10, b=0, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 319 SDslu, 691 SDs, 0 SdLazy, 346 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 693 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 575 ConstructedInterpolants, 0 QuantifiedInterpolants, 101075 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 615/1305 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...