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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:52,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:52,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:52,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:52,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:52,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:52,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:52,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:52,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:52,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:52,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:52,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:52,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:52,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:52,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:52,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:52,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:52,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:52,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:52,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:52,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:52,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:52,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:52,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:52,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:52,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:52,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:52,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:52,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:52,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:52,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:52,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:52,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:52,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:52,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:52,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:52,172 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 [2019-10-14 23:15:52,186 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:52,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:52,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:52,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:52,188 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:52,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:52,189 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:52,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:52,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:52,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:52,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:52,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:52,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:52,190 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:52,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:52,191 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:52,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:52,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:52,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:52,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:52,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:52,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:52,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:52,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:52,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:52,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:52,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:52,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:52,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:52,477 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:52,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:52,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:52,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:52,496 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:52,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-10-14 23:15:52,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac872bfb9/beb784ed292d416bb2aaea8171fc20a2/FLAG1746fa06f [2019-10-14 23:15:53,007 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:53,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-10-14 23:15:53,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac872bfb9/beb784ed292d416bb2aaea8171fc20a2/FLAG1746fa06f [2019-10-14 23:15:53,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac872bfb9/beb784ed292d416bb2aaea8171fc20a2 [2019-10-14 23:15:53,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:53,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:53,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:53,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:53,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:53,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fb5aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53, skipping insertion in model container [2019-10-14 23:15:53,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,416 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:53,436 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:53,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:53,649 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:53,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:53,688 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:53,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53 WrapperNode [2019-10-14 23:15:53,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:53,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:53,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:53,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:53,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:53,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:53,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:53,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:53,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (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 [2019-10-14 23:15:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:53,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:53,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:54,069 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:54,070 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:15:54,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:54 BoogieIcfgContainer [2019-10-14 23:15:54,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:54,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:54,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:54,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:54,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:53" (1/3) ... [2019-10-14 23:15:54,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5d2dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:54, skipping insertion in model container [2019-10-14 23:15:54,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (2/3) ... [2019-10-14 23:15:54,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5d2dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:54, skipping insertion in model container [2019-10-14 23:15:54,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:54" (3/3) ... [2019-10-14 23:15:54,080 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-10-14 23:15:54,090 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:54,097 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:54,117 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:54,147 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:54,148 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:54,148 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:54,148 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:54,148 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:54,148 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:54,149 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:54,149 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:15:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:54,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,195 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,197 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2019-10-14 23:15:54,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422876818] [2019-10-14 23:15:54,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422876818] [2019-10-14 23:15:54,425 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:54,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:15:54,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292700598] [2019-10-14 23:15:54,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:15:54,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:15:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:54,443 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:15:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,463 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-10-14 23:15:54,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:15:54,464 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-14 23:15:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,472 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:15:54,473 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:15:54,476 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 [2019-10-14 23:15:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:15:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:15:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:15:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-14 23:15:54,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-10-14 23:15:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,507 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-14 23:15:54,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:15:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-14 23:15:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:54,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,509 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,509 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2005341596, now seen corresponding path program 1 times [2019-10-14 23:15:54,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117642667] [2019-10-14 23:15:54,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117642667] [2019-10-14 23:15:54,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:54,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:15:54,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922373144] [2019-10-14 23:15:54,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:15:54,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:15:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:54,760 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-10-14 23:15:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,934 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-14 23:15:54,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:54,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-14 23:15:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,940 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:54,941 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:54,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2019-10-14 23:15:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:15:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-14 23:15:54,952 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-10-14 23:15:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,952 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-14 23:15:54,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:15:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-14 23:15:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:54,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,954 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,955 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash -763628086, now seen corresponding path program 1 times [2019-10-14 23:15:54,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476904560] [2019-10-14 23:15:54,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476904560] [2019-10-14 23:15:55,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477477525] [2019-10-14 23:15:55,224 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 [2019-10-14 23:15:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:55,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2019-10-14 23:15:55,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497547450] [2019-10-14 23:15:55,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:55,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:55,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:55,411 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2019-10-14 23:15:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,569 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-14 23:15:55,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:55,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-10-14 23:15:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,572 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:15:55,572 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:55,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-14 23:15:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 23:15:55,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-10-14 23:15:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,587 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 23:15:55,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 23:15:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:55,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,589 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,796 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1429772124, now seen corresponding path program 2 times [2019-10-14 23:15:55,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897340256] [2019-10-14 23:15:55,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897340256] [2019-10-14 23:15:55,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181710964] [2019-10-14 23:15:55,887 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 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 [2019-10-14 23:15:55,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:55,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,934 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:55,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-10-14 23:15:55,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608432457] [2019-10-14 23:15:55,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:55,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:55,936 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-10-14 23:15:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,973 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-10-14 23:15:55,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:15:55,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 23:15:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,975 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:15:55,975 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:55,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-14 23:15:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:15:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-14 23:15:55,980 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2019-10-14 23:15:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,981 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-14 23:15:55,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-14 23:15:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:55,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,982 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,192 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 345235238, now seen corresponding path program 1 times [2019-10-14 23:15:56,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918702893] [2019-10-14 23:15:56,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918702893] [2019-10-14 23:15:56,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395431443] [2019-10-14 23:15:56,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:15:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:56,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:56,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-10-14 23:15:56,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543066841] [2019-10-14 23:15:56,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:15:56,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:15:56,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:15:56,709 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2019-10-14 23:15:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,966 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-14 23:15:56,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:15:56,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-10-14 23:15:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,968 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:15:56,968 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:15:56,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:15:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:15:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-14 23:15:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:15:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 23:15:56,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-10-14 23:15:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,975 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 23:15:56,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:15:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 23:15:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:15:56,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,976 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,183 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash 124039624, now seen corresponding path program 2 times [2019-10-14 23:15:57,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214391802] [2019-10-14 23:15:57,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:15:57,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214391802] [2019-10-14 23:15:57,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987707959] [2019-10-14 23:15:57,400 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:57,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,664 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:57,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-10-14 23:15:57,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880284131] [2019-10-14 23:15:57,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:15:57,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:15:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:15:57,667 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 19 states. [2019-10-14 23:15:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,984 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-10-14 23:15:57,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:57,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-10-14 23:15:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,986 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:15:57,986 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:15:57,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:15:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:15:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:15:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:15:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-14 23:15:57,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2019-10-14 23:15:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,993 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-14 23:15:57,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:15:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-14 23:15:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:15:57,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,994 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,202 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 45653034, now seen corresponding path program 3 times [2019-10-14 23:15:58,208 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344492009] [2019-10-14 23:15:58,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:15:58,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344492009] [2019-10-14 23:15:58,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806400631] [2019-10-14 23:15:58,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:15:58,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:58,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 28 [2019-10-14 23:15:58,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005980882] [2019-10-14 23:15:58,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:15:58,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:15:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:15:58,919 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 28 states. [2019-10-14 23:15:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,383 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2019-10-14 23:15:59,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:15:59,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 29 [2019-10-14 23:15:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,384 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:15:59,384 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:15:59,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:15:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:15:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:15:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:15:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:15:59,387 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-10-14 23:15:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,387 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:15:59,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:15:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:15:59,388 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:15:59,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:15:59,761 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:15:59,762 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:59,762 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:59,762 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:15:59,762 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:15:59,762 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:15:59,762 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2019-10-14 23:15:59,763 INFO L439 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (<= main_~n~0 main_~k~0))) (or (let ((.cse0 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~i~0 0)) (and (<= main_~i~0 .cse1) (<= .cse1 main_~i~0) .cse2))) [2019-10-14 23:15:59,763 INFO L439 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and (<= main_~n~0 0) .cse0) (and .cse0 (<= main_~n~0 main_~k~0)))) [2019-10-14 23:15:59,764 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:15:59,764 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:59,764 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:15:59,764 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:15:59,765 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:15:59,765 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:59,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:15:59 BoogieIcfgContainer [2019-10-14 23:15:59,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:15:59,780 INFO L168 Benchmark]: Toolchain (without parser) took 6379.89 ms. Allocated memory was 139.5 MB in the beginning and 273.2 MB in the end (delta: 133.7 MB). Free memory was 105.1 MB in the beginning and 181.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,781 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.65 ms. Allocated memory is still 139.5 MB. Free memory was 104.9 MB in the beginning and 95.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,782 INFO L168 Benchmark]: Boogie Preprocessor took 113.68 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 95.5 MB in the beginning and 181.5 MB in the end (delta: -86.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,783 INFO L168 Benchmark]: RCFGBuilder took 267.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,784 INFO L168 Benchmark]: TraceAbstraction took 5704.57 ms. Allocated memory was 202.4 MB in the beginning and 273.2 MB in the end (delta: 70.8 MB). Free memory was 169.4 MB in the beginning and 181.8 MB in the end (delta: -12.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:59,788 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 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.65 ms. Allocated memory is still 139.5 MB. Free memory was 104.9 MB in the beginning and 95.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.68 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 95.5 MB in the beginning and 181.5 MB in the end (delta: -86.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5704.57 ms. Allocated memory was 202.4 MB in the beginning and 273.2 MB in the end (delta: 70.8 MB). Free memory was 169.4 MB in the beginning and 181.8 MB in the end (delta: -12.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (((i + 1 <= 2 * n && 2 * n <= i + 1) && n <= k) || ((0 <= n && n <= 0) && i == 0)) || ((i <= 2 * n && 2 * n <= i) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 5.6s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 80 SDtfs, 78 SDslu, 361 SDs, 0 SdLazy, 739 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 63 HoareAnnotationTreeSize, 16 FomulaSimplifications, 121 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 202 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 204 ConstructedInterpolants, 0 QuantifiedInterpolants, 31022 SizeOfPredicates, 13 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 17/148 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 correct! Received shutdown request...