/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:58:53,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:58:53,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:58:53,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:58:53,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:58:53,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:58:53,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:58:53,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:58:53,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:58:53,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:58:53,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:58:53,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:58:53,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:58:53,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:58:53,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:58:53,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:58:53,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:58:53,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:58:53,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:58:53,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:58:53,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:58:53,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:58:53,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:58:53,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:58:53,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:58:53,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:58:53,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:58:53,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:58:53,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:58:53,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:58:53,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:58:53,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:58:53,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:58:53,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:58:53,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:58:53,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:58:53,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:58:53,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:58:53,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:58:53,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:58:53,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:58:53,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:58:53,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:58:53,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:58:53,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:58:53,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:58:53,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:58:53,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:58:53,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:58:53,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:58:53,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:58:53,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:58:53,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:58:53,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:58:53,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:58:53,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:58:53,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:58:53,586 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:58:53,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:58:53,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:58:53,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:53,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:58:53,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:58:53,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:58:53,587 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:58:53,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:58:53,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:58:53,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:58:53,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:58:53,889 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:58:53,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-07-07 13:58:53,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42efd2883/f180ec911e0b4a7aa96786604e0fc542/FLAGc53fc37ce [2020-07-07 13:58:54,381 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:58:54,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-07-07 13:58:54,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42efd2883/f180ec911e0b4a7aa96786604e0fc542/FLAGc53fc37ce [2020-07-07 13:58:54,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42efd2883/f180ec911e0b4a7aa96786604e0fc542 [2020-07-07 13:58:54,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:58:54,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:58:54,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:54,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:58:54,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:58:54,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:54" (1/1) ... [2020-07-07 13:58:54,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460e57e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:54, skipping insertion in model container [2020-07-07 13:58:54,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:54" (1/1) ... [2020-07-07 13:58:54,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:58:54,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:58:55,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:55,044 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:58:55,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:55,080 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:58:55,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55 WrapperNode [2020-07-07 13:58:55,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:55,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:58:55,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:58:55,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:58:55,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... [2020-07-07 13:58:55,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:58:55,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:58:55,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:58:55,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:58:55,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:55,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:58:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:58:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:58:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:58:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:58:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:58:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 13:58:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:58:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:58:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:58:55,416 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:58:55,416 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:58:55,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:55 BoogieIcfgContainer [2020-07-07 13:58:55,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:58:55,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:58:55,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:58:55,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:58:55,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:58:54" (1/3) ... [2020-07-07 13:58:55,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458bebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:55, skipping insertion in model container [2020-07-07 13:58:55,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:55" (2/3) ... [2020-07-07 13:58:55,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458bebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:55, skipping insertion in model container [2020-07-07 13:58:55,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:55" (3/3) ... [2020-07-07 13:58:55,428 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-07-07 13:58:55,438 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:58:55,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:58:55,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:58:55,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:58:55,508 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:58:55,508 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:58:55,509 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:58:55,509 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:58:55,509 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:58:55,509 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:58:55,510 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:58:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 13:58:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 13:58:55,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:55,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:55,542 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-07-07 13:58:55,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:55,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848907350] [2020-07-07 13:58:55,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:55,699 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:55,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848907350] [2020-07-07 13:58:55,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:55,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 13:58:55,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335886336] [2020-07-07 13:58:55,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 13:58:55,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 13:58:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 13:58:55,721 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-07-07 13:58:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:55,742 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-07-07 13:58:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 13:58:55,744 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-07 13:58:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:55,750 INFO L225 Difference]: With dead ends: 38 [2020-07-07 13:58:55,751 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 13:58:55,754 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 [2020-07-07 13:58:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 13:58:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 13:58:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 13:58:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 13:58:55,788 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-07-07 13:58:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:55,789 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 13:58:55,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 13:58:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 13:58:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 13:58:55,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:55,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:55,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:58:55,791 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:55,792 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-07-07 13:58:55,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:55,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771055265] [2020-07-07 13:58:55,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:55,941 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:55,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771055265] [2020-07-07 13:58:55,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:55,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:55,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117876771] [2020-07-07 13:58:55,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:55,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:55,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:55,948 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-07-07 13:58:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:56,034 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 13:58:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:58:56,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 13:58:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:56,038 INFO L225 Difference]: With dead ends: 28 [2020-07-07 13:58:56,039 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 13:58:56,041 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 [2020-07-07 13:58:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 13:58:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-07-07 13:58:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 13:58:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 13:58:56,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-07-07 13:58:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:56,054 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 13:58:56,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 13:58:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 13:58:56,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:56,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:56,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:58:56,058 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-07-07 13:58:56,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:56,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881555509] [2020-07-07 13:58:56,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:56,456 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:56,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881555509] [2020-07-07 13:58:56,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:56,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:58:56,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958753539] [2020-07-07 13:58:56,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:58:56,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:58:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:58:56,459 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-07-07 13:58:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:56,718 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-07 13:58:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:58:56,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-07-07 13:58:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:56,720 INFO L225 Difference]: With dead ends: 35 [2020-07-07 13:58:56,721 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 13:58:56,722 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 [2020-07-07 13:58:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 13:58:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-07 13:58:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:58:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-07 13:58:56,731 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-07-07 13:58:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:56,731 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-07 13:58:56,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:58:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-07 13:58:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 13:58:56,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:56,733 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] [2020-07-07 13:58:56,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:58:56,734 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-07-07 13:58:56,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:56,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613987965] [2020-07-07 13:58:56,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 37 to 73 [2020-07-07 13:58:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:56,841 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:56,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613987965] [2020-07-07 13:58:56,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:56,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:58:56,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688212367] [2020-07-07 13:58:56,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:58:56,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:56,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:58:56,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:58:56,844 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2020-07-07 13:58:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:56,870 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-07-07 13:58:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:58:56,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-07 13:58:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:56,872 INFO L225 Difference]: With dead ends: 40 [2020-07-07 13:58:56,872 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 13:58:56,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:58:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 13:58:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 13:58:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:58:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-07 13:58:56,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-07-07 13:58:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:56,880 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-07 13:58:56,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:58:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-07 13:58:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:58:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:56,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:56,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:58:56,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-07-07 13:58:56,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:56,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546142607] [2020-07-07 13:58:56,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:57,177 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:57,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546142607] [2020-07-07 13:58:57,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:57,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:58:57,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155946948] [2020-07-07 13:58:57,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:58:57,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:58:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:58:57,180 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2020-07-07 13:58:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:57,555 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-07 13:58:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:58:57,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-07-07 13:58:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:57,556 INFO L225 Difference]: With dead ends: 40 [2020-07-07 13:58:57,557 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 13:58:57,557 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 [2020-07-07 13:58:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 13:58:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-07 13:58:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 13:58:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-07 13:58:57,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-07-07 13:58:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:57,565 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-07 13:58:57,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:58:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-07 13:58:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:58:57,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:57,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:57,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:58:57,567 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-07-07 13:58:57,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:57,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895386021] [2020-07-07 13:58:57,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:57,611 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895386021] [2020-07-07 13:58:57,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:57,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:57,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203077946] [2020-07-07 13:58:57,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:57,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:57,613 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-07-07 13:58:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:57,664 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-07 13:58:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:58:57,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-07 13:58:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:57,666 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:58:57,666 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 13:58:57,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:58:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 13:58:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-07 13:58:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 13:58:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-07 13:58:57,675 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-07-07 13:58:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:57,676 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-07 13:58:57,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-07 13:58:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:58:57,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:57,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:57,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:58:57,678 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-07-07 13:58:57,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:57,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861579502] [2020-07-07 13:58:57,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:57,737 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:57,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861579502] [2020-07-07 13:58:57,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:57,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:58:57,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081335344] [2020-07-07 13:58:57,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:58:57,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:58:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:58:57,740 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-07-07 13:58:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:57,823 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-07-07 13:58:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:58:57,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-07 13:58:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:57,825 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:58:57,825 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:58:57,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:58:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:58:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-07 13:58:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:58:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-07 13:58:57,847 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-07-07 13:58:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:57,847 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-07 13:58:57,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:58:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-07 13:58:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 13:58:57,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:57,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:57,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:58:57,850 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-07-07 13:58:57,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:57,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623488344] [2020-07-07 13:58:57,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:58:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:58:57,922 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:57,922 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:58:57,922 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:58:57,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:58:57,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:58:57 BoogieIcfgContainer [2020-07-07 13:58:57,942 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:58:57,945 INFO L168 Benchmark]: Toolchain (without parser) took 3155.60 ms. Allocated memory was 135.8 MB in the beginning and 253.2 MB in the end (delta: 117.4 MB). Free memory was 100.9 MB in the beginning and 218.4 MB in the end (delta: -117.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:58:57,946 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:58:57,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.47 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:57,947 INFO L168 Benchmark]: Boogie Preprocessor took 25.94 ms. Allocated memory is still 135.8 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:57,948 INFO L168 Benchmark]: RCFGBuilder took 312.08 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.6 MB in the beginning and 167.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:57,949 INFO L168 Benchmark]: TraceAbstraction took 2521.14 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 167.1 MB in the beginning and 218.4 MB in the end (delta: -51.3 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:57,953 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.47 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.94 ms. Allocated memory is still 135.8 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.08 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.6 MB in the beginning and 167.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2521.14 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 167.1 MB in the beginning and 218.4 MB in the end (delta: -51.3 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 36 SDslu, 379 SDs, 0 SdLazy, 311 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...