/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/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:13:00,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:13:00,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:13:00,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:13:00,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:13:00,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:13:00,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:13:00,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:13:00,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:13:00,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:13:00,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:13:00,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:13:00,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:13:00,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:13:00,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:13:00,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:13:00,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:13:00,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:13:00,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:13:00,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:13:00,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:13:00,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:13:00,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:13:00,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:13:00,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:13:00,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:13:00,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:13:00,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:13:00,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:13:00,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:13:00,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:13:00,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:13:00,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:13:00,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:13:00,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:13:00,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:13:00,641 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 23:13:00,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:13:00,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:13:00,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:13:00,655 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:13:00,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:13:00,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:13:00,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:13:00,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:13:00,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:13:00,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:13:00,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:13:00,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:13:00,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:13:00,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:13:00,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:13:00,657 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:13:00,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:13:00,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:13:00,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:13:00,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:13:00,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:13:00,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:13:00,659 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 23:13:01,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:13:01,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:13:01,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:13:01,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:13:01,168 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:13:01,170 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-09-04 23:13:01,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97ce749fb/3028d542ce92467b9d9b4b7401ed1617/FLAG58604b7ac [2020-09-04 23:13:01,859 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:13:01,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-09-04 23:13:01,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97ce749fb/3028d542ce92467b9d9b4b7401ed1617/FLAG58604b7ac [2020-09-04 23:13:02,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97ce749fb/3028d542ce92467b9d9b4b7401ed1617 [2020-09-04 23:13:02,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:13:02,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:13:02,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:13:02,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:13:02,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:13:02,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3786b6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02, skipping insertion in model container [2020-09-04 23:13:02,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:13:02,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:13:02,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:13:02,523 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:13:02,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:13:02,562 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:13:02,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02 WrapperNode [2020-09-04 23:13:02,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:13:02,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:13:02,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:13:02,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:13:02,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (1/1) ... [2020-09-04 23:13:02,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:13:02,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:13:02,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:13:02,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:13:02,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (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 23:13:02,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:13:02,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:13:02,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:13:02,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:13:02,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:13:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:13:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:13:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:13:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:13:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:13:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:13:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:13:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:13:03,059 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:13:03,060 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:13:03,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:13:03 BoogieIcfgContainer [2020-09-04 23:13:03,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:13:03,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:13:03,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:13:03,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:13:03,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:13:02" (1/3) ... [2020-09-04 23:13:03,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cfc294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:13:03, skipping insertion in model container [2020-09-04 23:13:03,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:13:02" (2/3) ... [2020-09-04 23:13:03,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cfc294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:13:03, skipping insertion in model container [2020-09-04 23:13:03,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:13:03" (3/3) ... [2020-09-04 23:13:03,078 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-09-04 23:13:03,093 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:13:03,109 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:13:03,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:13:03,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:13:03,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:13:03,197 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:13:03,197 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:13:03,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:13:03,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:13:03,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:13:03,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:13:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-04 23:13:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:13:03,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:03,230 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, 1, 1, 1, 1] [2020-09-04 23:13:03,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2007421113, now seen corresponding path program 1 times [2020-09-04 23:13:03,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:03,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877395932] [2020-09-04 23:13:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:03,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:03,562 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 23:13:03,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877395932] [2020-09-04 23:13:03,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:13:03,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 23:13:03,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893526747] [2020-09-04 23:13:03,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:13:03,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:03,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:13:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:13:03,595 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2020-09-04 23:13:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:03,798 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-09-04 23:13:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:13:03,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 23:13:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:03,813 INFO L225 Difference]: With dead ends: 68 [2020-09-04 23:13:03,813 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 23:13:03,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:13:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 23:13:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-04 23:13:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 23:13:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-04 23:13:03,891 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2020-09-04 23:13:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:03,891 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-04 23:13:03,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:13:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-04 23:13:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 23:13:03,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:03,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:03,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:13:03,895 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1994781074, now seen corresponding path program 1 times [2020-09-04 23:13:03,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:03,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201929636] [2020-09-04 23:13:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 23:13:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:04,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201929636] [2020-09-04 23:13:04,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:13:04,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 23:13:04,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086371473] [2020-09-04 23:13:04,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:13:04,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:13:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:13:04,136 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-09-04 23:13:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:04,379 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 23:13:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:13:04,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-04 23:13:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:04,383 INFO L225 Difference]: With dead ends: 46 [2020-09-04 23:13:04,383 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 23:13:04,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:13:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 23:13:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-04 23:13:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:13:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 23:13:04,421 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 29 [2020-09-04 23:13:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:04,422 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 23:13:04,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:13:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 23:13:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 23:13:04,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:04,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:04,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:13:04,426 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1065397402, now seen corresponding path program 1 times [2020-09-04 23:13:04,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:04,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753256190] [2020-09-04 23:13:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 23:13:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 23:13:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 23:13:04,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753256190] [2020-09-04 23:13:04,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:13:04,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 23:13:04,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713818718] [2020-09-04 23:13:04,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:13:04,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:13:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:13:04,651 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 9 states. [2020-09-04 23:13:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:04,838 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-04 23:13:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:13:04,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-04 23:13:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:04,841 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:13:04,841 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 23:13:04,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:13:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 23:13:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-09-04 23:13:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 23:13:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-09-04 23:13:04,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 38 [2020-09-04 23:13:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:04,854 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-09-04 23:13:04,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:13:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-09-04 23:13:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 23:13:04,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:04,856 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:04,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:13:04,857 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash 470853039, now seen corresponding path program 2 times [2020-09-04 23:13:04,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:04,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845637382] [2020-09-04 23:13:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:04,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 23:13:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 23:13:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 23:13:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 23:13:05,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845637382] [2020-09-04 23:13:05,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:05,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:13:05,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144552249] [2020-09-04 23:13:05,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:13:05,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:13:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:13:05,039 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 10 states. [2020-09-04 23:13:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:05,311 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-09-04 23:13:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:13:05,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-04 23:13:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:05,316 INFO L225 Difference]: With dead ends: 60 [2020-09-04 23:13:05,316 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 23:13:05,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:13:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 23:13:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-04 23:13:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 23:13:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-09-04 23:13:05,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 43 [2020-09-04 23:13:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:05,342 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-09-04 23:13:05,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:13:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-09-04 23:13:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 23:13:05,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:05,350 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:05,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:13:05,351 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:05,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2065107152, now seen corresponding path program 3 times [2020-09-04 23:13:05,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:05,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592096427] [2020-09-04 23:13:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 23:13:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 23:13:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 23:13:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-04 23:13:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 23:13:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-09-04 23:13:05,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592096427] [2020-09-04 23:13:05,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:05,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:13:05,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690902911] [2020-09-04 23:13:05,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:13:05,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:13:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:13:05,482 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 8 states. [2020-09-04 23:13:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:05,601 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-09-04 23:13:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:13:05,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-09-04 23:13:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:05,602 INFO L225 Difference]: With dead ends: 56 [2020-09-04 23:13:05,603 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:13:05,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:13:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:13:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:13:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:13:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:13:05,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-04 23:13:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:05,605 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:13:05,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:13:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:13:05,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:13:05,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:13:05,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:13:06,433 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-09-04 23:13:06,440 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,440 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,440 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,440 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,441 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,441 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:13:06,441 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:13:06,441 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:13:06,441 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 23:13:06,442 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 23:13:06,442 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:13:06,442 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-09-04 23:13:06,442 INFO L264 CegarLoopResult]: At program point L31(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,442 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 |main_#t~post1|) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,443 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 1 main_~glob2_p_off~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 |main_#t~post1|) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,443 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,443 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= (+ main_~pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,443 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 34) the Hoare annotation is: true [2020-09-04 23:13:06,444 INFO L264 CegarLoopResult]: At program point L27-3(lines 27 32) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,444 INFO L271 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: true [2020-09-04 23:13:06,444 INFO L271 CegarLoopResult]: At program point L21-1(line 21) the Hoare annotation is: true [2020-09-04 23:13:06,444 INFO L271 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: true [2020-09-04 23:13:06,444 INFO L271 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: true [2020-09-04 23:13:06,445 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-09-04 23:13:06,445 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 34) the Hoare annotation is: true [2020-09-04 23:13:06,445 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0)) (.cse1 (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0)) (.cse2 (<= main_~pathbuf_off~0 0)) (.cse3 (<= 0 main_~pathbuf_off~0)) (.cse4 (<= 0 main_~glob2_pathbuf_off~0)) (.cse5 (<= main_~bound_off~0 main_~MAXPATHLEN~0))) (or (and .cse0 .cse1 (<= (+ main_~glob2_p_off~0 1) main_~MAXPATHLEN~0) .cse2 .cse3 (<= 0 main_~glob2_p_off~0) .cse4 .cse5) (and (<= 1 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2020-09-04 23:13:06,445 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-09-04 23:13:06,446 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0)) (.cse1 (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0)) (.cse2 (<= main_~pathbuf_off~0 0)) (.cse3 (<= 0 main_~pathbuf_off~0)) (.cse4 (<= 0 main_~glob2_pathbuf_off~0)) (.cse5 (<= main_~bound_off~0 main_~MAXPATHLEN~0))) (or (and .cse0 .cse1 (<= (+ main_~glob2_p_off~0 1) main_~MAXPATHLEN~0) .cse2 .cse3 (<= 0 main_~glob2_p_off~0) .cse4 .cse5) (and (<= 1 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2020-09-04 23:13:06,446 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 23:13:06,446 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (<= (+ main_~pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0)) [2020-09-04 23:13:06,446 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-09-04 23:13:06,446 INFO L264 CegarLoopResult]: At program point L22-1(line 22) the Hoare annotation is: (<= 1 main_~MAXPATHLEN~0) [2020-09-04 23:13:06,447 INFO L271 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: true [2020-09-04 23:13:06,447 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-09-04 23:13:06,447 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-04 23:13:06,447 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 23:13:06,447 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:13:06,447 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:13:06,447 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:13:06,448 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:13:06,448 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:13:06,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:13:06 BoogieIcfgContainer [2020-09-04 23:13:06,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:13:06,505 INFO L168 Benchmark]: Toolchain (without parser) took 4261.95 ms. Allocated memory was 136.3 MB in the beginning and 252.2 MB in the end (delta: 115.9 MB). Free memory was 100.8 MB in the beginning and 140.4 MB in the end (delta: -39.6 MB). Peak memory consumption was 117.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:13:06,506 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:13:06,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.48 ms. Allocated memory is still 136.3 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:13:06,509 INFO L168 Benchmark]: Boogie Preprocessor took 130.29 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 178.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:13:06,511 INFO L168 Benchmark]: RCFGBuilder took 372.85 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 164.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:13:06,514 INFO L168 Benchmark]: TraceAbstraction took 3431.92 ms. Allocated memory was 199.8 MB in the beginning and 252.2 MB in the end (delta: 52.4 MB). Free memory was 163.7 MB in the beginning and 140.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 117.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:13:06,521 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.48 ms. Allocated memory is still 136.3 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.29 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 178.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.85 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 164.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3431.92 ms. Allocated memory was 199.8 MB in the beginning and 252.2 MB in the end (delta: 52.4 MB). Free memory was 163.7 MB in the beginning and 140.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 117.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((glob2_pathbuf_off + 1 <= MAXPATHLEN && glob2_pathlim_off <= MAXPATHLEN) && pathbuf_off <= 0) && 0 <= pathbuf_off) && 0 <= glob2_p_off) && 0 <= glob2_pathbuf_off) && bound_off <= MAXPATHLEN - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 158 SDslu, 687 SDs, 0 SdLazy, 311 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 78 PreInvPairs, 114 NumberOfFragments, 341 HoareAnnotationTreeSize, 78 FomulaSimplifications, 989 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 36 FomulaSimplificationsInter, 341 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 14762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 88/95 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...