/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/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:37,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:37,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:37,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:37,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:37,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:37,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:37,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:37,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:37,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:37,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:37,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:37,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:37,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:37,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:37,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:37,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:37,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:37,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:37,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:37,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:37,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:37,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:37,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:37,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:10:37,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:37,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:37,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:37,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:10:37,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:37,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:37,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:37,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:37,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:37,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:37,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:37,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:37,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:37,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:37,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:37,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:37,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:37,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:37,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:37,698 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:37,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:37,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:37,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:37,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:37,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:37,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:37,699 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 [2020-09-04 23:10:38,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:38,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:38,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:38,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:38,236 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:38,238 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-04 23:10:38,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2331d2f0/f8cfa05cf916474189571a6f734633eb/FLAG0b6bef04a [2020-09-04 23:10:38,856 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:38,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-04 23:10:38,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2331d2f0/f8cfa05cf916474189571a6f734633eb/FLAG0b6bef04a [2020-09-04 23:10:39,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2331d2f0/f8cfa05cf916474189571a6f734633eb [2020-09-04 23:10:39,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:39,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:39,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:39,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:39,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:39,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dc5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39, skipping insertion in model container [2020-09-04 23:10:39,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:39,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:39,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:39,486 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:39,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:39,518 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:39,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39 WrapperNode [2020-09-04 23:10:39,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:39,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:39,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:39,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:39,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... [2020-09-04 23:10:39,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:39,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:39,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:39,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:39,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:10:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:39,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:10:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 23:10:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:39,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:39,931 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:10:39,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:39 BoogieIcfgContainer [2020-09-04 23:10:39,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:39,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:39,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:39,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:39" (1/3) ... [2020-09-04 23:10:39,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b91698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:39, skipping insertion in model container [2020-09-04 23:10:39,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:39" (2/3) ... [2020-09-04 23:10:39,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b91698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:39, skipping insertion in model container [2020-09-04 23:10:39,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:39" (3/3) ... [2020-09-04 23:10:39,946 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-04 23:10:39,958 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:39,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:39,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:40,020 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:40,020 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:40,021 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:40,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:40,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:40,021 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:40,021 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:40,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-04 23:10:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 23:10:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:40,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:40,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:40,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-04 23:10:40,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:40,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507659090] [2020-09-04 23:10:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:40,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507659090] [2020-09-04 23:10:40,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:40,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:10:40,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820142486] [2020-09-04 23:10:40,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:10:40,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:10:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:10:40,242 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-04 23:10:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:40,273 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-04 23:10:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:10:40,275 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-04 23:10:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:40,286 INFO L225 Difference]: With dead ends: 37 [2020-09-04 23:10:40,286 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 23:10:40,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:10:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 23:10:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 23:10:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 23:10:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 23:10:40,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-04 23:10:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:40,340 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 23:10:40,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:10:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 23:10:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 23:10:40,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:40,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:40,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:40,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:40,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-04 23:10:40,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:40,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477669782] [2020-09-04 23:10:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:40,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477669782] [2020-09-04 23:10:40,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:40,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:10:40,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367198635] [2020-09-04 23:10:40,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:40,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:40,471 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-04 23:10:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:40,523 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-04 23:10:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:40,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 23:10:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:40,525 INFO L225 Difference]: With dead ends: 31 [2020-09-04 23:10:40,525 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 23:10:40,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:10:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 23:10:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-04 23:10:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 23:10:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-04 23:10:40,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-04 23:10:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:40,536 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-04 23:10:40,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-04 23:10:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 23:10:40,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:40,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:40,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:40,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:40,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:40,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-04 23:10:40,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:40,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102589316] [2020-09-04 23:10:40,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:40,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102589316] [2020-09-04 23:10:40,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:40,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:10:40,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612236253] [2020-09-04 23:10:40,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:10:40,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:10:40,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:40,977 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-04 23:10:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:41,248 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-09-04 23:10:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:10:41,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-04 23:10:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:41,250 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:10:41,250 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 23:10:41,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:10:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 23:10:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-04 23:10:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 23:10:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 23:10:41,260 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-04 23:10:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:41,261 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 23:10:41,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:10:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 23:10:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 23:10:41,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:41,262 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] [2020-09-04 23:10:41,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:10:41,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:41,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:41,263 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-04 23:10:41,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:41,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983713651] [2020-09-04 23:10:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:41,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:41,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983713651] [2020-09-04 23:10:41,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:41,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 23:10:41,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779301281] [2020-09-04 23:10:41,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:41,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:41,324 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-04 23:10:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:41,382 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-04 23:10:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:10:41,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-04 23:10:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:41,384 INFO L225 Difference]: With dead ends: 42 [2020-09-04 23:10:41,384 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 23:10:41,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 23:10:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-04 23:10:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 23:10:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-04 23:10:41,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-04 23:10:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:41,393 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-04 23:10:41,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-04 23:10:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 23:10:41,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:41,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:41,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:10:41,395 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-04 23:10:41,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:41,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7531145] [2020-09-04 23:10:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:41,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:10:41,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7531145] [2020-09-04 23:10:41,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:41,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:10:41,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100121847] [2020-09-04 23:10:41,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:10:41,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:10:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:41,715 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2020-09-04 23:10:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,071 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-04 23:10:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:10:42,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-09-04 23:10:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,072 INFO L225 Difference]: With dead ends: 41 [2020-09-04 23:10:42,073 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 23:10:42,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:10:42,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 23:10:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-04 23:10:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 23:10:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-04 23:10:42,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-04 23:10:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,083 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-04 23:10:42,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:10:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-04 23:10:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 23:10:42,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:10:42,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-04 23:10:42,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027674562] [2020-09-04 23:10:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:42,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027674562] [2020-09-04 23:10:42,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:10:42,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700059399] [2020-09-04 23:10:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:10:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:10:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:42,162 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-09-04 23:10:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,239 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-04 23:10:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:10:42,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-04 23:10:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,241 INFO L225 Difference]: With dead ends: 54 [2020-09-04 23:10:42,241 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:10:42,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:10:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-09-04 23:10:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 23:10:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-04 23:10:42,252 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-09-04 23:10:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,252 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-04 23:10:42,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:10:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-04 23:10:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 23:10:42,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:10:42,255 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-04 23:10:42,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944389967] [2020-09-04 23:10:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:42,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944389967] [2020-09-04 23:10:42,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:10:42,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001139786] [2020-09-04 23:10:42,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:10:42,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:10:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:10:42,349 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-04 23:10:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,455 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-04 23:10:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:10:42,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-04 23:10:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,456 INFO L225 Difference]: With dead ends: 60 [2020-09-04 23:10:42,456 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 23:10:42,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:10:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 23:10:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-04 23:10:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 23:10:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-04 23:10:42,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-04 23:10:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,467 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-04 23:10:42,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:10:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-04 23:10:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 23:10:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,468 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:10:42,469 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-04 23:10:42,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122643178] [2020-09-04 23:10:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:42,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122643178] [2020-09-04 23:10:42,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:10:42,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281924602] [2020-09-04 23:10:42,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:10:42,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:10:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:42,576 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-04 23:10:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,720 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-04 23:10:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:10:42,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-04 23:10:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,722 INFO L225 Difference]: With dead ends: 66 [2020-09-04 23:10:42,722 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 23:10:42,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:10:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 23:10:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-04 23:10:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 23:10:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-04 23:10:42,733 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-04 23:10:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,733 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-04 23:10:42,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:10:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-04 23:10:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 23:10:42,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,735 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:10:42,736 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-04 23:10:42,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292070210] [2020-09-04 23:10:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:42,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292070210] [2020-09-04 23:10:42,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:10:42,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002037697] [2020-09-04 23:10:42,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:10:42,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:10:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:42,863 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-04 23:10:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,036 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-04 23:10:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:10:43,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-04 23:10:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,037 INFO L225 Difference]: With dead ends: 72 [2020-09-04 23:10:43,038 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 23:10:43,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:10:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 23:10:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-04 23:10:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-04 23:10:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-04 23:10:43,047 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-04 23:10:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,048 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-04 23:10:43,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:10:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-04 23:10:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 23:10:43,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,049 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:10:43,050 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-04 23:10:43,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770843878] [2020-09-04 23:10:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:43,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770843878] [2020-09-04 23:10:43,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:43,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:10:43,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74596886] [2020-09-04 23:10:43,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:10:43,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:10:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:10:43,234 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-04 23:10:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,452 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-04 23:10:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:10:43,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-04 23:10:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,454 INFO L225 Difference]: With dead ends: 78 [2020-09-04 23:10:43,454 INFO L226 Difference]: Without dead ends: 67 [2020-09-04 23:10:43,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:10:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-04 23:10:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-04 23:10:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 23:10:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-04 23:10:43,465 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-04 23:10:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,466 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-04 23:10:43,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:10:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-04 23:10:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 23:10:43,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,467 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:10:43,468 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-04 23:10:43,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945314315] [2020-09-04 23:10:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:43,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945314315] [2020-09-04 23:10:43,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:43,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:10:43,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389602551] [2020-09-04 23:10:43,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:10:43,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:10:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:10:43,659 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-04 23:10:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,957 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-04 23:10:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 23:10:43,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-04 23:10:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,958 INFO L225 Difference]: With dead ends: 84 [2020-09-04 23:10:43,959 INFO L226 Difference]: Without dead ends: 73 [2020-09-04 23:10:43,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:10:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-04 23:10:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-04 23:10:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 23:10:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-04 23:10:43,982 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-04 23:10:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,984 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-04 23:10:43,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:10:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-04 23:10:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 23:10:43,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,990 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:10:43,991 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-04 23:10:43,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434841445] [2020-09-04 23:10:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434841445] [2020-09-04 23:10:44,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:44,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:10:44,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287793584] [2020-09-04 23:10:44,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:10:44,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:10:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:10:44,258 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-04 23:10:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:44,672 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-04 23:10:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:10:44,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-04 23:10:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:44,674 INFO L225 Difference]: With dead ends: 89 [2020-09-04 23:10:44,675 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 23:10:44,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:10:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 23:10:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-04 23:10:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 23:10:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-04 23:10:44,700 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-04 23:10:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:44,701 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-04 23:10:44,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:10:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-04 23:10:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 23:10:44,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:44,702 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:44,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:10:44,702 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:44,706 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-04 23:10:44,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:44,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047512101] [2020-09-04 23:10:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:44,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:44,772 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:44,801 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:10:44,801 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:10:44,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:10:44,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:10:44 BoogieIcfgContainer [2020-09-04 23:10:44,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:10:44,884 INFO L168 Benchmark]: Toolchain (without parser) took 5644.74 ms. Allocated memory was 145.8 MB in the beginning and 283.1 MB in the end (delta: 137.4 MB). Free memory was 103.1 MB in the beginning and 145.8 MB in the end (delta: -42.7 MB). Peak memory consumption was 94.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:44,887 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:10:44,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:44,890 INFO L168 Benchmark]: Boogie Preprocessor took 112.60 ms. Allocated memory was 145.8 MB in the beginning and 200.8 MB in the end (delta: 55.1 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:44,891 INFO L168 Benchmark]: RCFGBuilder took 303.46 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 168.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:44,899 INFO L168 Benchmark]: TraceAbstraction took 4939.09 ms. Allocated memory was 200.8 MB in the beginning and 283.1 MB in the end (delta: 82.3 MB). Free memory was 167.6 MB in the beginning and 145.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:44,906 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.60 ms. Allocated memory was 145.8 MB in the beginning and 200.8 MB in the end (delta: 55.1 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.46 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 168.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4939.09 ms. Allocated memory was 200.8 MB in the beginning and 283.1 MB in the end (delta: 82.3 MB). Free memory was 167.6 MB in the beginning and 145.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=10, n=10] [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [n=0, n=10] [L13] i=1 VAL [i=1, n=10, n=0] [L13] COND TRUE i<=n VAL [i=1, n=0, n=10] [L14] COND TRUE i<10 VAL [i=1, n=0, n=10] [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 VAL [i=2, n=10, n=2] [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 VAL [i=3, n=4, n=10] [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 VAL [i=4, n=10, n=6] [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=8, n=10] [L14] COND TRUE i<10 VAL [i=5, n=10, n=8] [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 VAL [i=6, n=10, n=10] [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=12, n=10] [L14] COND TRUE i<10 VAL [i=7, n=12, n=10] [L15] sn = sn + (2) VAL [i=7, n=10, n=14] [L13] i++ VAL [i=8, n=10, n=14] [L13] COND TRUE i<=n VAL [i=8, n=10, n=14] [L14] COND TRUE i<10 VAL [i=8, n=10, n=14] [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=10, n=16] [L14] COND TRUE i<10 VAL [i=9, n=16, n=10] [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=18, n=10] [L14] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L13] i++ VAL [i=11, n=18, n=10] [L13] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 176 SDslu, 1151 SDs, 0 SdLazy, 707 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, 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, 12 MinimizatonAttempts, 30 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 515 NumberOfCodeBlocks, 515 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 430 ConstructedInterpolants, 0 QuantifiedInterpolants, 51244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 153/737 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...