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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:41,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:41,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:41,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:41,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:41,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:41,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:41,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:41,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:41,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:41,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:41,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:41,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:41,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:41,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:41,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:41,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:41,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:41,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:41,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:41,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:03:41,579 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:41,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:41,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:41,580 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:41,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:41,581 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:41,581 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:41,581 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:41,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:41,582 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:41,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:41,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:41,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:41,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:41,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:41,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:41,584 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:41,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:41,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:41,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:41,585 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:41,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:41,586 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:41,613 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:41,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:41,631 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:41,632 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:41,632 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:41,633 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-09-16 17:03:41,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e40bf46f/96c5ec0cb2db427faa408f4862daffd0/FLAGf728fba39 [2019-09-16 17:03:42,220 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:42,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-09-16 17:03:42,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e40bf46f/96c5ec0cb2db427faa408f4862daffd0/FLAGf728fba39 [2019-09-16 17:03:42,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e40bf46f/96c5ec0cb2db427faa408f4862daffd0 [2019-09-16 17:03:42,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:42,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:42,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:42,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:42,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:42,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69cec1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42, skipping insertion in model container [2019-09-16 17:03:42,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,640 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:42,660 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:42,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:42,858 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:42,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:42,885 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:42,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42 WrapperNode [2019-09-16 17:03:42,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:42,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:42,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:42,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:42,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:43,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:43,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:43,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:43,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:43,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (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 [2019-09-16 17:03:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:03:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 17:03:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 17:03:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:43,265 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:43,265 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 17:03:43,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:43 BoogieIcfgContainer [2019-09-16 17:03:43,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:43,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:43,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:43,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:43,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:42" (1/3) ... [2019-09-16 17:03:43,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eeb3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:43, skipping insertion in model container [2019-09-16 17:03:43,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42" (2/3) ... [2019-09-16 17:03:43,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eeb3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:43, skipping insertion in model container [2019-09-16 17:03:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:43" (3/3) ... [2019-09-16 17:03:43,287 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-09-16 17:03:43,309 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:43,321 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:43,338 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:43,384 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:43,384 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:43,384 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:43,384 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:43,384 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:43,385 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:43,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:43,385 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-16 17:03:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-16 17:03:43,427 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:43,428 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:43,431 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2019-09-16 17:03:43,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:43,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:43,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:43,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:43,482 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:43,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:43,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 17:03:43,540 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:43,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:03:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:03:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:43,557 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-16 17:03:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:43,572 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-16 17:03:43,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:03:43,573 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-16 17:03:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:43,581 INFO L225 Difference]: With dead ends: 21 [2019-09-16 17:03:43,581 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 17:03:43,583 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 17:03:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 17:03:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 17:03:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-16 17:03:43,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-09-16 17:03:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:43,614 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-16 17:03:43,615 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:03:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-16 17:03:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-16 17:03:43,615 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:43,616 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:43,616 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2005341596, now seen corresponding path program 1 times [2019-09-16 17:03:43,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:43,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:43,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:43,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:43,619 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:43,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:43,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-16 17:03:43,882 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:43,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 17:03:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 17:03:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:03:43,886 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-09-16 17:03:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:44,021 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-16 17:03:44,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:03:44,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-09-16 17:03:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:44,025 INFO L225 Difference]: With dead ends: 24 [2019-09-16 17:03:44,025 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 17:03:44,027 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 17:03:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2019-09-16 17:03:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-16 17:03:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-16 17:03:44,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-09-16 17:03:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:44,033 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-16 17:03:44,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 17:03:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-16 17:03:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:44,034 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:44,035 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:44,035 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash -763628086, now seen corresponding path program 1 times [2019-09-16 17:03:44,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:44,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,038 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:44,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:44,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:44,298 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2019-09-16 17:03:44,300 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [19], [23], [30], [33], [35], [41], [42], [43], [45] [2019-09-16 17:03:44,330 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:44,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:44,397 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-16 17:03:44,476 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:03:44,479 INFO L272 AbstractInterpreter]: Visited 14 different actions 21 times. Merged at 3 different actions 3 times. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 8. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-16 17:03:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,491 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:03:44,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:44,491 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:44,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,513 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:44,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 17:03:44,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:44,692 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 17:03:44,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:44,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 17 [2019-09-16 17:03:44,772 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:44,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-16 17:03:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-16 17:03:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-09-16 17:03:44,773 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2019-09-16 17:03:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:44,945 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-16 17:03:44,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:03:44,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-09-16 17:03:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:44,946 INFO L225 Difference]: With dead ends: 21 [2019-09-16 17:03:44,946 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 17:03:44,948 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-09-16 17:03:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 17:03:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-09-16 17:03:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-16 17:03:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-16 17:03:44,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-16 17:03:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:44,952 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-16 17:03:44,952 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-16 17:03:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-16 17:03:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-16 17:03:44,953 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:44,953 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:44,953 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1429772124, now seen corresponding path program 2 times [2019-09-16 17:03:44,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:44,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,956 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:45,054 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:45,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:45,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:45,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:45,074 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-16 17:03:45,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 17:03:45,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:45,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-16 17:03:45,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,133 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:45,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 11 [2019-09-16 17:03:45,262 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:45,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 17:03:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 17:03:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:45,264 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-16 17:03:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:45,314 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-16 17:03:45,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:45,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-09-16 17:03:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:45,316 INFO L225 Difference]: With dead ends: 20 [2019-09-16 17:03:45,316 INFO L226 Difference]: Without dead ends: 20 [2019-09-16 17:03:45,317 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-16 17:03:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-09-16 17:03:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-16 17:03:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-09-16 17:03:45,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2019-09-16 17:03:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:45,321 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-09-16 17:03:45,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 17:03:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-09-16 17:03:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-16 17:03:45,322 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:45,322 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:45,323 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 345235238, now seen corresponding path program 1 times [2019-09-16 17:03:45,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:45,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:45,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:45,556 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-16 17:03:45,557 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [19], [21], [23], [30], [33], [35], [41], [42], [43], [45] [2019-09-16 17:03:45,558 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:45,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:45,566 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-16 17:03:45,849 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:03:45,850 INFO L272 AbstractInterpreter]: Visited 15 different actions 73 times. Merged at 5 different actions 28 times. Widened at 1 different actions 4 times. Performed 140 root evaluator evaluations with a maximum evaluation depth of 10. Performed 140 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 8 fixpoints after 3 different actions. Largest state had 6 variables. [2019-09-16 17:03:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:03:45,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,851 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:45,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:45,878 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-16 17:03:45,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:46,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:46,100 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:46,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:46,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2019-09-16 17:03:46,435 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:46,436 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-16 17:03:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-16 17:03:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2019-09-16 17:03:46,438 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2019-09-16 17:03:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:46,788 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-09-16 17:03:46,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-16 17:03:46,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-09-16 17:03:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:46,790 INFO L225 Difference]: With dead ends: 33 [2019-09-16 17:03:46,790 INFO L226 Difference]: Without dead ends: 29 [2019-09-16 17:03:46,791 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2019-09-16 17:03:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-16 17:03:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-09-16 17:03:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 17:03:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-16 17:03:46,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-09-16 17:03:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:46,795 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-16 17:03:46,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-16 17:03:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-16 17:03:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:03:46,797 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:46,797 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:46,797 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash 124039624, now seen corresponding path program 2 times [2019-09-16 17:03:46,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:46,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:46,799 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 17:03:46,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:46,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:46,993 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:46,993 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:46,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:46,994 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:47,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:47,014 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:47,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 17:03:47,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:47,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-16 17:03:47,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:47,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-16 17:03:47,178 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:47,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-16 17:03:47,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:47,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 7] total 19 [2019-09-16 17:03:47,372 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:47,373 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-16 17:03:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-16 17:03:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-16 17:03:47,374 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 16 states. [2019-09-16 17:03:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:47,630 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-16 17:03:47,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 17:03:47,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-09-16 17:03:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:47,633 INFO L225 Difference]: With dead ends: 31 [2019-09-16 17:03:47,633 INFO L226 Difference]: Without dead ends: 31 [2019-09-16 17:03:47,634 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2019-09-16 17:03:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-16 17:03:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-16 17:03:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-16 17:03:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-16 17:03:47,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2019-09-16 17:03:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:47,645 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-16 17:03:47,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-16 17:03:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-16 17:03:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-16 17:03:47,647 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:47,647 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:47,648 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 45653034, now seen corresponding path program 3 times [2019-09-16 17:03:47,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:47,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:47,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:47,655 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-16 17:03:47,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:47,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:47,962 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:47,962 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:47,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:47,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:47,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 17:03:47,999 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:48,016 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 17:03:48,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:48,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-16 17:03:48,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:48,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:48,374 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Stream closed [2019-09-16 17:03:49,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:49,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2019-09-16 17:03:49,071 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:49,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-16 17:03:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-16 17:03:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2019-09-16 17:03:49,074 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2019-09-16 17:03:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:49,746 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-09-16 17:03:49,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-16 17:03:49,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2019-09-16 17:03:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:49,747 INFO L225 Difference]: With dead ends: 36 [2019-09-16 17:03:49,747 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:49,749 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=2045, Unknown=0, NotChecked=0, Total=2450 [2019-09-16 17:03:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:49,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-09-16 17:03:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:49,751 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:49,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-16 17:03:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:49,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:49,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:49 BoogieIcfgContainer [2019-09-16 17:03:49,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:49,759 INFO L168 Benchmark]: Toolchain (without parser) took 7138.14 ms. Allocated memory was 132.6 MB in the beginning and 314.0 MB in the end (delta: 181.4 MB). Free memory was 88.7 MB in the beginning and 264.3 MB in the end (delta: -175.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,760 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.85 ms. Allocated memory is still 132.6 MB. Free memory was 88.5 MB in the beginning and 79.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,762 INFO L168 Benchmark]: Boogie Preprocessor took 114.82 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 79.1 MB in the beginning and 176.2 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,763 INFO L168 Benchmark]: RCFGBuilder took 266.42 ms. Allocated memory is still 199.8 MB. Free memory was 176.2 MB in the beginning and 164.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,764 INFO L168 Benchmark]: TraceAbstraction took 6488.14 ms. Allocated memory was 199.8 MB in the beginning and 314.0 MB in the end (delta: 114.3 MB). Free memory was 163.8 MB in the beginning and 264.3 MB in the end (delta: -100.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:49,768 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.85 ms. Allocated memory is still 132.6 MB. Free memory was 88.5 MB in the beginning and 79.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.82 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 79.1 MB in the beginning and 176.2 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.42 ms. Allocated memory is still 199.8 MB. Free memory was 176.2 MB in the beginning and 164.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6488.14 ms. Allocated memory was 199.8 MB in the beginning and 314.0 MB in the end (delta: 114.3 MB). Free memory was 163.8 MB in the beginning and 264.3 MB in the end (delta: -100.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 6.3s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 72 SDslu, 424 SDs, 0 SdLazy, 818 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 281 GetRequests, 134 SyntacticMatches, 14 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 216 NumberOfCodeBlocks, 213 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 296 ConstructedInterpolants, 0 QuantifiedInterpolants, 72630 SizeOfPredicates, 16 NumberOfNonLiveVariables, 239 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 29/222 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...