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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:17:46,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:46,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:46,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:46,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:46,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:46,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:46,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:46,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:46,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:46,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:46,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:46,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:46,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:46,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:46,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:46,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:46,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:46,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:46,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:46,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:46,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:46,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:46,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:46,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:17:46,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:46,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:46,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:46,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:46,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:46,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:46,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:46,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:46,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:46,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:46,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:46,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:17:46,158 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:46,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:46,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:46,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:46,160 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:46,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:46,161 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:46,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:46,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:46,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:46,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:46,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:46,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:46,162 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:46,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:46,163 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:46,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:46,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:46,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:46,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:46,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:46,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:46,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:46,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:46,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:46,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:46,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:46,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:46,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:46,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:46,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:46,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:46,462 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:46,462 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:46,463 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-13 19:17:46,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f68e311/462f9c3bc0b640baafbbb87e31a491f4/FLAGe2d87267d [2019-10-13 19:17:47,016 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:47,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-13 19:17:47,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f68e311/462f9c3bc0b640baafbbb87e31a491f4/FLAGe2d87267d [2019-10-13 19:17:47,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f68e311/462f9c3bc0b640baafbbb87e31a491f4 [2019-10-13 19:17:47,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:47,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:47,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:47,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:47,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:47,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175279dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47, skipping insertion in model container [2019-10-13 19:17:47,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,400 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:47,418 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:47,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:47,699 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:47,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:47,740 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:47,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47 WrapperNode [2019-10-13 19:17:47,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:47,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:47,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:47,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:47,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (1/1) ... [2019-10-13 19:17:47,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:47,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:47,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:47,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:47,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (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 [2019-10-13 19:17:47,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:47,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:47,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:47,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:48,123 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:48,123 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:17:48,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:48 BoogieIcfgContainer [2019-10-13 19:17:48,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:48,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:48,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:48,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:48,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:47" (1/3) ... [2019-10-13 19:17:48,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cae026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:48, skipping insertion in model container [2019-10-13 19:17:48,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:47" (2/3) ... [2019-10-13 19:17:48,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cae026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:48, skipping insertion in model container [2019-10-13 19:17:48,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:48" (3/3) ... [2019-10-13 19:17:48,134 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-10-13 19:17:48,144 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:48,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:48,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:48,243 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:48,243 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:48,243 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:48,243 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:48,244 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:48,244 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:48,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:48,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 19:17:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:17:48,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:48,271 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:48,273 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-10-13 19:17:48,291 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:48,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951413988] [2019-10-13 19:17:48,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:48,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951413988] [2019-10-13 19:17:48,411 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:48,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:17:48,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261256568] [2019-10-13 19:17:48,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:17:48,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:17:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:17:48,431 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-13 19:17:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:48,452 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-13 19:17:48,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:17:48,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 19:17:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:48,461 INFO L225 Difference]: With dead ends: 30 [2019-10-13 19:17:48,461 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:17:48,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:17:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:17:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:17:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:17:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-13 19:17:48,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-13 19:17:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:48,502 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-13 19:17:48,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:17:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-13 19:17:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:17:48,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:48,504 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:48,504 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-10-13 19:17:48,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:48,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876793011] [2019-10-13 19:17:48,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:48,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876793011] [2019-10-13 19:17:48,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:48,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:17:48,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585037060] [2019-10-13 19:17:48,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:17:48,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:17:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:17:48,602 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-10-13 19:17:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:48,654 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-13 19:17:48,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:17:48,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-13 19:17:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:48,656 INFO L225 Difference]: With dead ends: 19 [2019-10-13 19:17:48,656 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 19:17:48,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:17:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 19:17:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 19:17:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 19:17:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-13 19:17:48,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-13 19:17:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:48,662 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-13 19:17:48,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:17:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-13 19:17:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:17:48,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:48,664 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:48,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:48,664 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2019-10-13 19:17:48,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:48,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618843795] [2019-10-13 19:17:48,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:48,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618843795] [2019-10-13 19:17:48,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641018246] [2019-10-13 19:17:48,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:17:48,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:49,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:49,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:49,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-13 19:17:49,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727698487] [2019-10-13 19:17:49,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:17:49,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:17:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:17:49,121 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2019-10-13 19:17:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:49,311 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-10-13 19:17:49,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:17:49,312 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-10-13 19:17:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:49,313 INFO L225 Difference]: With dead ends: 32 [2019-10-13 19:17:49,314 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:17:49,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:17:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:17:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:17:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:17:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-13 19:17:49,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-10-13 19:17:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:49,328 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-13 19:17:49,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:17:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-13 19:17:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:17:49,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:49,329 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:49,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:49,535 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2019-10-13 19:17:49,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:49,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885748278] [2019-10-13 19:17:49,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:49,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:49,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:49,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885748278] [2019-10-13 19:17:49,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151953178] [2019-10-13 19:17:49,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:49,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:17:49,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:49,649 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:49,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-10-13 19:17:49,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637766073] [2019-10-13 19:17:49,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:17:49,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:17:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:17:49,651 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-13 19:17:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:49,682 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-10-13 19:17:49,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:17:49,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 19:17:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:49,684 INFO L225 Difference]: With dead ends: 28 [2019-10-13 19:17:49,684 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:17:49,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:17:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:17:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:17:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:17:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-13 19:17:49,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-10-13 19:17:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:49,690 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-13 19:17:49,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:17:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-13 19:17:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:17:49,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:49,691 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:49,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:49,896 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2019-10-13 19:17:49,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:49,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159931029] [2019-10-13 19:17:49,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:49,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:49,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:17:50,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159931029] [2019-10-13 19:17:50,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360385408] [2019-10-13 19:17:50,159 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:50,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:50,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:50,201 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:17:50,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:50,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:50,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:50,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2019-10-13 19:17:50,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147138476] [2019-10-13 19:17:50,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:17:50,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:17:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:17:50,415 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 19 states. [2019-10-13 19:17:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:50,845 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-13 19:17:50,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:17:50,846 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2019-10-13 19:17:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:50,847 INFO L225 Difference]: With dead ends: 38 [2019-10-13 19:17:50,847 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:17:50,851 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:17:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:17:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-13 19:17:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:17:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 19:17:50,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-10-13 19:17:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:50,863 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 19:17:50,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:17:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 19:17:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:17:50,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:50,868 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:51,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:51,074 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2019-10-13 19:17:51,075 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:51,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802217879] [2019-10-13 19:17:51,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:51,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:51,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:51,145 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-13 19:17:51,145 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 19:17:51,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:51 BoogieIcfgContainer [2019-10-13 19:17:51,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:17:51,175 INFO L168 Benchmark]: Toolchain (without parser) took 3790.78 ms. Allocated memory was 143.7 MB in the beginning and 231.2 MB in the end (delta: 87.6 MB). Free memory was 101.8 MB in the beginning and 86.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,176 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.73 ms. Allocated memory is still 143.7 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,178 INFO L168 Benchmark]: Boogie Preprocessor took 151.16 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 92.3 MB in the beginning and 180.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,181 INFO L168 Benchmark]: RCFGBuilder took 231.13 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 169.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,182 INFO L168 Benchmark]: TraceAbstraction took 3045.80 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 168.9 MB in the beginning and 86.9 MB in the end (delta: 81.9 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:51,195 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 357.73 ms. Allocated memory is still 143.7 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.16 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 92.3 MB in the beginning and 180.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.13 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 169.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3045.80 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 168.9 MB in the beginning and 86.9 MB in the end (delta: 81.9 MB). Peak memory consumption was 111.3 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=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [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=4, n=6] [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=4, n=-10] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [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. Result: UNSAFE, OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 17 SDslu, 195 SDs, 0 SdLazy, 286 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 7806 SizeOfPredicates, 7 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 11/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...