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-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:33:16,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:33:16,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:33:16,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:33:16,813 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 [2019-10-03 02:33:16,839 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:33:16,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:33:16,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:33:16,840 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:33:16,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:33:16,841 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:33:16,841 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:33:16,841 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:33:16,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:33:16,842 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:33:16,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:33:16,844 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:33:16,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:33:16,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:33:16,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:33:16,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:33:16,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:33:16,846 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:33:16,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:33:16,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:33:16,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:33:16,847 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:33:16,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:33:16,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:33:16,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:33:16,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:33:16,848 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:33:16,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:33:16,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:33:16,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:33:16,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:33:16,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:33:16,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:33:16,913 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:33:16,914 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:33:16,914 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2019-10-03 02:33:16,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21905785e/6898e04263004863bdf1ada84bb77639/FLAGcd0a5f3e3 [2019-10-03 02:33:17,420 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:33:17,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2019-10-03 02:33:17,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21905785e/6898e04263004863bdf1ada84bb77639/FLAGcd0a5f3e3 [2019-10-03 02:33:17,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21905785e/6898e04263004863bdf1ada84bb77639 [2019-10-03 02:33:17,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:33:17,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:33:17,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:17,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:33:17,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:33:17,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:17" (1/1) ... [2019-10-03 02:33:17,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a029f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:17, skipping insertion in model container [2019-10-03 02:33:17,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:17" (1/1) ... [2019-10-03 02:33:17,870 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:33:17,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:33:18,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:18,108 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:33:18,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:18,140 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:33:18,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18 WrapperNode [2019-10-03 02:33:18,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:18,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:33:18,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:33:18,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:33:18,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (1/1) ... [2019-10-03 02:33:18,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:33:18,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:33:18,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:33:18,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:33:18,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (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 [2019-10-03 02:33:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:33:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:33:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:33:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:33:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:33:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:33:18,456 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:33:18,456 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:33:18,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:18 BoogieIcfgContainer [2019-10-03 02:33:18,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:33:18,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:33:18,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:33:18,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:33:18,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:33:17" (1/3) ... [2019-10-03 02:33:18,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295acda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:18, skipping insertion in model container [2019-10-03 02:33:18,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:18" (2/3) ... [2019-10-03 02:33:18,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295acda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:18, skipping insertion in model container [2019-10-03 02:33:18,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:18" (3/3) ... [2019-10-03 02:33:18,468 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2019-10-03 02:33:18,479 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:33:18,486 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:33:18,501 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:33:18,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:33:18,527 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:33:18,527 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:33:18,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:33:18,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:33:18,528 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:33:18,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:33:18,528 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:33:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-03 02:33:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:33:18,550 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:18,550 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:18,553 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2019-10-03 02:33:18,559 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:18,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:18,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:18,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:18,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-03 02:33:18,697 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:18,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-03 02:33:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-03 02:33:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:33:18,718 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-03 02:33:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:18,744 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-03 02:33:18,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-03 02:33:18,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-03 02:33:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:18,757 INFO L225 Difference]: With dead ends: 19 [2019-10-03 02:33:18,757 INFO L226 Difference]: Without dead ends: 12 [2019-10-03 02:33:18,759 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:33:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-03 02:33:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-03 02:33:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-03 02:33:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-03 02:33:18,791 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-03 02:33:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:18,792 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-03 02:33:18,792 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-03 02:33:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-03 02:33:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-03 02:33:18,792 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:18,793 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:18,793 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash -429188558, now seen corresponding path program 1 times [2019-10-03 02:33:18,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:18,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:18,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:18,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:18,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:18,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:18,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:18,838 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-10-03 02:33:18,840 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [20], [23], [25], [31], [32], [33], [35] [2019-10-03 02:33:18,878 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:33:18,878 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:33:19,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:33:19,030 INFO L272 AbstractInterpreter]: Visited 11 different actions 31 times. Merged at 2 different actions 8 times. Widened at 1 different actions 2 times. Performed 63 root evaluator evaluations with a maximum evaluation depth of 4. Performed 63 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-10-03 02:33:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:19,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:33:19,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,035 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 [2019-10-03 02:33:19,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:19,049 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:33:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:19,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-03 02:33:19,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,148 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:19,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2019-10-03 02:33:19,195 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:19,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:33:19,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:33:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:33:19,197 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-10-03 02:33:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:19,219 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-03 02:33:19,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-03 02:33:19,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-03 02:33:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:19,221 INFO L225 Difference]: With dead ends: 13 [2019-10-03 02:33:19,221 INFO L226 Difference]: Without dead ends: 13 [2019-10-03 02:33:19,222 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:33:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-03 02:33:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-03 02:33:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-03 02:33:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-03 02:33:19,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-03 02:33:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:19,227 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-03 02:33:19,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:33:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-03 02:33:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-03 02:33:19,228 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:19,228 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:19,229 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash -384405667, now seen corresponding path program 2 times [2019-10-03 02:33:19,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:19,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:19,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,232 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:19,288 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:33:19,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:33:19,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,289 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) [2019-10-03 02:33:19,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:33:19,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:33:19,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-03 02:33:19,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:33:19,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-03 02:33:19,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,406 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:19,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-10-03 02:33:19,456 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:19,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-03 02:33:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-03 02:33:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:33:19,458 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-10-03 02:33:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:19,491 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-10-03 02:33:19,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:33:19,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-10-03 02:33:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:19,494 INFO L225 Difference]: With dead ends: 14 [2019-10-03 02:33:19,494 INFO L226 Difference]: Without dead ends: 14 [2019-10-03 02:33:19,494 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:33:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-03 02:33:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-03 02:33:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-03 02:33:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-03 02:33:19,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-03 02:33:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:19,500 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-03 02:33:19,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-03 02:33:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-03 02:33:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:33:19,502 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:19,503 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:19,503 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1003863954, now seen corresponding path program 3 times [2019-10-03 02:33:19,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:19,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:33:19,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:19,602 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:33:19,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:33:19,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,602 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 [2019-10-03 02:33:19,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-03 02:33:19,633 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-10-03 02:33:19,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-03 02:33:19,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:33:19,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-03 02:33:19,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,717 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:19,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-10-03 02:33:19,755 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:19,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-03 02:33:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-03 02:33:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:33:19,757 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-10-03 02:33:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:19,788 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-03 02:33:19,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:33:19,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-10-03 02:33:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:19,790 INFO L225 Difference]: With dead ends: 15 [2019-10-03 02:33:19,790 INFO L226 Difference]: Without dead ends: 15 [2019-10-03 02:33:19,791 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:33:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-03 02:33:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-03 02:33:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-03 02:33:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-03 02:33:19,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-03 02:33:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:19,795 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-03 02:33:19,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-03 02:33:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-03 02:33:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-03 02:33:19,796 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:19,797 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:19,797 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1090549245, now seen corresponding path program 4 times [2019-10-03 02:33:19,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:19,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:33:19,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:19,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:19,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:19,973 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:33:19,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:33:19,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:19,975 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:33:19,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:19,996 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:33:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:20,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-03 02:33:20,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:20,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:33:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:20,072 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:20,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:20,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2019-10-03 02:33:20,100 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:20,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-03 02:33:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-03 02:33:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:33:20,102 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-10-03 02:33:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:20,202 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-03 02:33:20,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-03 02:33:20,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-10-03 02:33:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:20,207 INFO L225 Difference]: With dead ends: 19 [2019-10-03 02:33:20,207 INFO L226 Difference]: Without dead ends: 16 [2019-10-03 02:33:20,211 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-03 02:33:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-03 02:33:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-03 02:33:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-03 02:33:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-03 02:33:20,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-03 02:33:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:20,217 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-03 02:33:20,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-03 02:33:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-03 02:33:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-03 02:33:20,221 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:20,221 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:20,221 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash -517174030, now seen corresponding path program 5 times [2019-10-03 02:33:20,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:20,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:20,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:20,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:20,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:20,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:20,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-03 02:33:20,324 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:20,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-03 02:33:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-03 02:33:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:33:20,328 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2019-10-03 02:33:20,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:20,345 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2019-10-03 02:33:20,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:33:20,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-03 02:33:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:20,346 INFO L225 Difference]: With dead ends: 10 [2019-10-03 02:33:20,346 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:33:20,347 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:33:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:33:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:33:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:33:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:33:20,349 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-10-03 02:33:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:20,349 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:33:20,349 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-03 02:33:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:33:20,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:33:20,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:33:20 BoogieIcfgContainer [2019-10-03 02:33:20,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:33:20,360 INFO L168 Benchmark]: Toolchain (without parser) took 2505.81 ms. Allocated memory was 131.6 MB in the beginning and 220.2 MB in the end (delta: 88.6 MB). Free memory was 86.1 MB in the beginning and 146.7 MB in the end (delta: -60.7 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,362 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 131.6 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.92 ms. Allocated memory is still 131.6 MB. Free memory was 85.7 MB in the beginning and 76.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,366 INFO L168 Benchmark]: Boogie Preprocessor took 114.76 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 76.6 MB in the beginning and 174.8 MB in the end (delta: -98.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,367 INFO L168 Benchmark]: RCFGBuilder took 202.08 ms. Allocated memory is still 198.7 MB. Free memory was 174.8 MB in the beginning and 164.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,373 INFO L168 Benchmark]: TraceAbstraction took 1896.35 ms. Allocated memory was 198.7 MB in the beginning and 220.2 MB in the end (delta: 21.5 MB). Free memory was 163.8 MB in the beginning and 146.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:20,380 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 131.6 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.92 ms. Allocated memory is still 131.6 MB. Free memory was 85.7 MB in the beginning and 76.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.76 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 76.6 MB in the beginning and 174.8 MB in the end (delta: -98.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 202.08 ms. Allocated memory is still 198.7 MB. Free memory was 174.8 MB in the beginning and 164.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1896.35 ms. Allocated memory was 198.7 MB in the beginning and 220.2 MB in the end (delta: 21.5 MB). Free memory was 163.8 MB in the beginning and 146.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 38.5 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, 18 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 2 SDslu, 171 SDs, 0 SdLazy, 104 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 5103 SizeOfPredicates, 8 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 15/75 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...