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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:36:50,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:36:50,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:36:50,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:36:50,073 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 [2019-09-03 20:36:50,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:36:50,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:36:50,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:36:50,089 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:36:50,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:36:50,090 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:36:50,090 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:36:50,091 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:36:50,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:36:50,091 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:36:50,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:36:50,092 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:36:50,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:36:50,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:36:50,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:36:50,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:36:50,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:36:50,093 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:36:50,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:36:50,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:36:50,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:36:50,094 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:36:50,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:36:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:36:50,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:36:50,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:36:50,095 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:36:50,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:36:50,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:36:50,096 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:36:50,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:36:50,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:36:50,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:36:50,143 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:36:50,143 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:36:50,144 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-09-03 20:36:50,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d45929261/fbd1fbf70fb945e5b766779b16e68f03/FLAGbdd06fef4 [2019-09-03 20:36:50,677 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:36:50,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-09-03 20:36:50,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d45929261/fbd1fbf70fb945e5b766779b16e68f03/FLAGbdd06fef4 [2019-09-03 20:36:51,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d45929261/fbd1fbf70fb945e5b766779b16e68f03 [2019-09-03 20:36:51,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:36:51,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:36:51,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:36:51,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:36:51,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:36:51,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635b5632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51, skipping insertion in model container [2019-09-03 20:36:51,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,123 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:36:51,139 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:36:51,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:36:51,289 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:36:51,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:36:51,318 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:36:51,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51 WrapperNode [2019-09-03 20:36:51,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:36:51,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:36:51,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:36:51,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:36:51,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (1/1) ... [2019-09-03 20:36:51,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:36:51,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:36:51,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:36:51,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:36:51,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (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 [2019-09-03 20:36:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:36:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:36:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:36:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:36:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:36:51,645 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:36:51,645 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:36:51,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:36:51 BoogieIcfgContainer [2019-09-03 20:36:51,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:36:51,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:36:51,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:36:51,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:36:51,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:36:51" (1/3) ... [2019-09-03 20:36:51,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e7d368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:36:51, skipping insertion in model container [2019-09-03 20:36:51,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:51" (2/3) ... [2019-09-03 20:36:51,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e7d368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:36:51, skipping insertion in model container [2019-09-03 20:36:51,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:36:51" (3/3) ... [2019-09-03 20:36:51,654 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-09-03 20:36:51,664 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:36:51,671 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:36:51,689 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:36:51,743 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:36:51,743 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:36:51,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:36:51,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:36:51,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:36:51,744 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:36:51,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:36:51,745 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:36:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 20:36:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:36:51,781 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:51,782 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:51,789 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-03 20:36:51,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:51,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:51,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:51,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:51,861 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:51,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:36:51,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:36:51,928 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:36:51,932 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:36:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:36:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:36:51,946 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-03 20:36:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:51,960 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-09-03 20:36:51,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:36:51,961 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:36:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:51,970 INFO L225 Difference]: With dead ends: 19 [2019-09-03 20:36:51,970 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:36:51,972 INFO L628 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 [2019-09-03 20:36:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:36:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:36:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:36:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-03 20:36:52,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-03 20:36:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:52,010 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-03 20:36:52,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:36:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-03 20:36:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:36:52,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:52,011 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:52,011 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-03 20:36:52,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:52,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:52,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:52,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:52,014 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:52,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:36:52,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:36:52,147 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:36:52,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:36:52,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:36:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:36:52,150 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-03 20:36:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:52,235 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-09-03 20:36:52,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:36:52,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:36:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:52,237 INFO L225 Difference]: With dead ends: 17 [2019-09-03 20:36:52,238 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:36:52,239 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:36:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:36:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:36:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:36:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 20:36:52,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 20:36:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:52,248 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 20:36:52,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:36:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 20:36:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:36:52,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:52,250 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:52,250 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2019-09-03 20:36:52,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:52,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:52,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:52,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:52,254 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:52,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:52,512 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:36:52,514 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-03 20:36:52,520 INFO L207 CegarAbsIntRunner]: [0], [4], [10], [12], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2019-09-03 20:36:52,563 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:36:52,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:36:52,667 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-03 20:36:52,816 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:36:52,819 INFO L272 AbstractInterpreter]: Visited 13 different actions 53 times. Merged at 4 different actions 20 times. Widened at 1 different actions 3 times. Performed 86 root evaluator evaluations with a maximum evaluation depth of 6. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-09-03 20:36:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:52,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:36:52,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:52,825 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 [2019-09-03 20:36:52,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:52,842 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:36:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:52,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:36:52,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:36:52,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:36:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:53,029 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:36:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:53,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:36:53,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2019-09-03 20:36:53,220 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:36:53,221 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:36:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:36:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:36:53,223 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2019-09-03 20:36:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:53,392 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-03 20:36:53,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:36:53,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-09-03 20:36:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:53,394 INFO L225 Difference]: With dead ends: 24 [2019-09-03 20:36:53,394 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 20:36:53,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:36:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 20:36:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 20:36:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 20:36:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-09-03 20:36:53,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-09-03 20:36:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:53,399 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-09-03 20:36:53,399 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:36:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-09-03 20:36:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:36:53,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:53,400 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:53,401 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2019-09-03 20:36:53,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:53,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:53,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:53,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:53,402 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:53,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:53,443 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:36:53,443 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-03 20:36:53,444 INFO L207 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2019-09-03 20:36:53,446 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:36:53,446 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:36:53,448 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-03 20:36:53,499 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:36:53,500 INFO L272 AbstractInterpreter]: Visited 14 different actions 69 times. Merged at 5 different actions 25 times. Widened at 1 different actions 4 times. Performed 120 root evaluator evaluations with a maximum evaluation depth of 6. Performed 120 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 5 variables. [2019-09-03 20:36:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:53,500 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:36:53,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:53,500 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 [2019-09-03 20:36:53,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:53,521 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:36:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:53,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 20:36:53,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:36:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:53,537 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:36:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:53,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:36:53,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2019-09-03 20:36:53,566 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:36:53,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:36:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:36:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:36:53,567 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-09-03 20:36:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:53,585 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-03 20:36:53,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:36:53,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-09-03 20:36:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:53,587 INFO L225 Difference]: With dead ends: 20 [2019-09-03 20:36:53,587 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 20:36:53,588 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:36:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 20:36:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 20:36:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 20:36:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-03 20:36:53,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-09-03 20:36:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:53,592 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-03 20:36:53,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:36:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-03 20:36:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:36:53,593 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:53,593 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:53,593 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2019-09-03 20:36:53,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:53,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:53,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:53,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:53,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-03 20:36:53,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:53,786 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:36:53,786 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:36:53,786 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:36:53,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:36:53,786 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 [2019-09-03 20:36:53,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:36:53,803 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 20:36:53,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:36:53,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:36:53,821 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:36:53,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:36:53,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:36:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:54,037 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:36:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:36:54,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:36:54,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2019-09-03 20:36:54,405 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:36:54,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:36:54,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:36:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:36:54,415 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 19 states. [2019-09-03 20:36:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:54,913 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-03 20:36:54,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:36:54,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2019-09-03 20:36:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:54,915 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:36:54,915 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 20:36:54,916 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:36:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 20:36:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-03 20:36:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:36:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-03 20:36:54,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-09-03 20:36:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:54,921 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-03 20:36:54,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:36:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-03 20:36:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:36:54,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:54,922 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:54,922 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2019-09-03 20:36:54,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:54,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:54,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:36:54,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:54,924 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 20:36:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 20:36:55,003 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-03 20:36:55,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:36:55 BoogieIcfgContainer [2019-09-03 20:36:55,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:36:55,031 INFO L168 Benchmark]: Toolchain (without parser) took 3924.26 ms. Allocated memory was 131.6 MB in the beginning and 266.3 MB in the end (delta: 134.7 MB). Free memory was 87.5 MB in the beginning and 192.9 MB in the end (delta: -105.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,032 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 131.6 MB. Free memory was 105.7 MB in the beginning and 105.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.17 ms. Allocated memory is still 131.6 MB. Free memory was 87.3 MB in the beginning and 77.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,034 INFO L168 Benchmark]: Boogie Preprocessor took 121.62 ms. Allocated memory was 131.6 MB in the beginning and 199.8 MB in the end (delta: 68.2 MB). Free memory was 77.8 MB in the beginning and 176.6 MB in the end (delta: -98.8 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,035 INFO L168 Benchmark]: RCFGBuilder took 205.47 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 165.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,036 INFO L168 Benchmark]: TraceAbstraction took 3380.92 ms. Allocated memory was 199.8 MB in the beginning and 266.3 MB in the end (delta: 66.6 MB). Free memory was 165.0 MB in the beginning and 192.9 MB in the end (delta: -27.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:36:55,040 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 131.6 MB. Free memory was 105.7 MB in the beginning and 105.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 212.17 ms. Allocated memory is still 131.6 MB. Free memory was 87.3 MB in the beginning and 77.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.62 ms. Allocated memory was 131.6 MB in the beginning and 199.8 MB in the end (delta: 68.2 MB). Free memory was 77.8 MB in the beginning and 176.6 MB in the end (delta: -98.8 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 205.47 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 165.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3380.92 ms. Allocated memory was 199.8 MB in the beginning and 266.3 MB in the end (delta: 66.6 MB). Free memory was 165.0 MB in the beginning and 192.9 MB in the end (delta: -27.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=6, n=4] [L15] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=8, n=4] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 3.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 17 SDslu, 180 SDs, 0 SdLazy, 276 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 153 ConstructedInterpolants, 8 QuantifiedInterpolants, 13251 SizeOfPredicates, 9 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 14/54 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...