/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_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:39,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:39,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:39,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:39,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:39,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:39,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:39,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:39,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:39,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:39,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:39,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:39,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:39,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:39,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:39,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:39,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:39,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:39,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:39,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:39,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:39,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:39,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:39,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:39,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:10:39,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:39,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:39,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:39,685 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 23:10:39,702 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:39,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:39,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:39,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:39,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:39,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:39,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:39,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:39,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:39,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:39,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:39,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:39,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:39,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:39,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:39,709 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:39,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:39,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:39,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:39,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:39,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:39,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:39,711 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 23:10:40,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:40,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:40,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:40,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:40,198 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:40,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-04 23:10:40,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/415eeb5f0/aba016ac32034d83810c9b53af297eb9/FLAG98ebba900 [2020-09-04 23:10:40,797 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:40,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-04 23:10:40,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/415eeb5f0/aba016ac32034d83810c9b53af297eb9/FLAG98ebba900 [2020-09-04 23:10:41,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/415eeb5f0/aba016ac32034d83810c9b53af297eb9 [2020-09-04 23:10:41,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:41,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:41,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:41,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:41,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:41,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41, skipping insertion in model container [2020-09-04 23:10:41,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:41,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:41,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:41,437 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:41,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:41,474 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:41,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41 WrapperNode [2020-09-04 23:10:41,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:41,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:41,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:41,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:41,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (1/1) ... [2020-09-04 23:10:41,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:41,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:41,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:41,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:41,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (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 23:10:41,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:41,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:41,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:10:41,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:10:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 23:10:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:41,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:41,853 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:10:41,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:41 BoogieIcfgContainer [2020-09-04 23:10:41,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:41,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:41,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:41,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:41,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:41" (1/3) ... [2020-09-04 23:10:41,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:41, skipping insertion in model container [2020-09-04 23:10:41,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:41" (2/3) ... [2020-09-04 23:10:41,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:41, skipping insertion in model container [2020-09-04 23:10:41,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:41" (3/3) ... [2020-09-04 23:10:41,868 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-04 23:10:41,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:41,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:41,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:41,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:42,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:42,000 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:42,000 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:42,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:42,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:42,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:42,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 23:10:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:10:42,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-04 23:10:42,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972924242] [2020-09-04 23:10:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,202 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 23:10:42,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972924242] [2020-09-04 23:10:42,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:42,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:10:42,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110148690] [2020-09-04 23:10:42,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:10:42,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:10:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:10:42,234 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-09-04 23:10:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,265 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-04 23:10:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:10:42,267 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-04 23:10:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,277 INFO L225 Difference]: With dead ends: 41 [2020-09-04 23:10:42,278 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 23:10:42,282 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 23:10:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 23:10:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 23:10:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 23:10:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 23:10:42,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-04 23:10:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,331 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 23:10:42,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:10:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 23:10:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:10:42,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:42,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:42,333 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash 62535021, now seen corresponding path program 1 times [2020-09-04 23:10:42,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673850035] [2020-09-04 23:10:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,434 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 23:10:42,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673850035] [2020-09-04 23:10:42,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:42,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:10:42,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603831116] [2020-09-04 23:10:42,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:42,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:42,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:42,438 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-09-04 23:10:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:42,484 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-04 23:10:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:42,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-04 23:10:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:42,486 INFO L225 Difference]: With dead ends: 38 [2020-09-04 23:10:42,487 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 23:10:42,488 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 23:10:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 23:10:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-04 23:10:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 23:10:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-04 23:10:42,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-04 23:10:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:42,499 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-04 23:10:42,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-04 23:10:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:10:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:42,501 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 23:10:42,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:42,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-04 23:10:42,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:42,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330079493] [2020-09-04 23:10:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,872 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 23:10:42,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330079493] [2020-09-04 23:10:42,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:10:42,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873251916] [2020-09-04 23:10:42,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:10:42,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:10:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:42,876 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-04 23:10:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,154 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-04 23:10:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:10:43,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-04 23:10:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,159 INFO L225 Difference]: With dead ends: 60 [2020-09-04 23:10:43,159 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 23:10:43,160 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 23:10:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 23:10:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-04 23:10:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:10:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-04 23:10:43,174 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-04 23:10:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,174 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-04 23:10:43,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:10:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-04 23:10:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 23:10:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:10:43,177 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-04 23:10:43,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696231389] [2020-09-04 23:10:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:43,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696231389] [2020-09-04 23:10:43,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:43,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:10:43,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232235047] [2020-09-04 23:10:43,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:10:43,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:10:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:10:43,317 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-04 23:10:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,482 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-04 23:10:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:10:43,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-04 23:10:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,483 INFO L225 Difference]: With dead ends: 60 [2020-09-04 23:10:43,484 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 23:10:43,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 23:10:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-04 23:10:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 23:10:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-04 23:10:43,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-04 23:10:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,501 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-04 23:10:43,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:10:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-04 23:10:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:10:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:10:43,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-04 23:10:43,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21550146] [2020-09-04 23:10:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:10:43,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21550146] [2020-09-04 23:10:43,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:43,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:10:43,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992511255] [2020-09-04 23:10:43,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:10:43,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:10:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:43,832 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-04 23:10:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:44,176 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-04 23:10:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:10:44,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-04 23:10:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:44,178 INFO L225 Difference]: With dead ends: 54 [2020-09-04 23:10:44,178 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 23:10:44,179 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 23:10:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 23:10:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-04 23:10:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-04 23:10:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-04 23:10:44,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-04 23:10:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:44,189 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-04 23:10:44,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:10:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-04 23:10:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:10:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:44,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:44,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:10:44,191 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:44,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-04 23:10:44,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:44,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165211710] [2020-09-04 23:10:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:44,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165211710] [2020-09-04 23:10:44,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:44,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:10:44,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465319789] [2020-09-04 23:10:44,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:10:44,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:10:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:10:44,341 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-04 23:10:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:44,539 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-04 23:10:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:10:44,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-04 23:10:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:44,541 INFO L225 Difference]: With dead ends: 70 [2020-09-04 23:10:44,541 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 23:10:44,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:10:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 23:10:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-04 23:10:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 23:10:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-04 23:10:44,552 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-04 23:10:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:44,553 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-04 23:10:44,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:10:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-04 23:10:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 23:10:44,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:44,554 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:44,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:10:44,555 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-04 23:10:44,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:44,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636206474] [2020-09-04 23:10:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:44,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636206474] [2020-09-04 23:10:44,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:44,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:10:44,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461286312] [2020-09-04 23:10:44,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:10:44,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:10:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:10:44,787 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-04 23:10:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:45,097 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-04 23:10:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:10:45,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-04 23:10:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:45,099 INFO L225 Difference]: With dead ends: 79 [2020-09-04 23:10:45,099 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 23:10:45,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:10:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 23:10:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-04 23:10:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 23:10:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-04 23:10:45,110 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-04 23:10:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:45,111 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-04 23:10:45,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:10:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-04 23:10:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 23:10:45,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:45,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:45,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:10:45,113 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-04 23:10:45,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:45,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186101170] [2020-09-04 23:10:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:45,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:45,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186101170] [2020-09-04 23:10:45,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:45,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:10:45,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347020945] [2020-09-04 23:10:45,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:10:45,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:10:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:10:45,394 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-04 23:10:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:45,783 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-04 23:10:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 23:10:45,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-04 23:10:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:45,786 INFO L225 Difference]: With dead ends: 87 [2020-09-04 23:10:45,786 INFO L226 Difference]: Without dead ends: 73 [2020-09-04 23:10:45,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:10:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-04 23:10:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-04 23:10:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 23:10:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-04 23:10:45,805 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-04 23:10:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:45,805 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-04 23:10:45,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:10:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-04 23:10:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 23:10:45,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:45,811 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:45,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:10:45,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-04 23:10:45,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:45,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46940320] [2020-09-04 23:10:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:45,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:45,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:45,927 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:10:45,927 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:10:45,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:10:45,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:10:45 BoogieIcfgContainer [2020-09-04 23:10:45,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:10:45,997 INFO L168 Benchmark]: Toolchain (without parser) took 4823.16 ms. Allocated memory was 142.1 MB in the beginning and 272.6 MB in the end (delta: 130.5 MB). Free memory was 105.5 MB in the beginning and 230.5 MB in the end (delta: -125.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:45,998 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 142.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:10:45,999 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.37 ms. Allocated memory is still 142.1 MB. Free memory was 105.2 MB in the beginning and 95.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:46,000 INFO L168 Benchmark]: Boogie Preprocessor took 104.10 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.8 MB in the beginning and 184.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:46,000 INFO L168 Benchmark]: RCFGBuilder took 277.66 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:46,001 INFO L168 Benchmark]: TraceAbstraction took 4134.26 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 171.0 MB in the beginning and 230.5 MB in the end (delta: -59.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:46,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 142.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.37 ms. Allocated memory is still 142.1 MB. Free memory was 105.2 MB in the beginning and 95.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.10 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.8 MB in the beginning and 184.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.66 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4134.26 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 171.0 MB in the beginning and 230.5 MB in the end (delta: -59.5 MB). Peak memory consumption was 8.7 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=6, j=10, n=6] [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [j=10, n=6, n=0] [L13] i=1 VAL [i=1, j=10, n=6, n=0] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i