/usr/bin/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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:16:40,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:16:40,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:16:40,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:16:40,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:16:40,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:16:40,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:16:40,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:16:40,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:16:40,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:16:40,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:16:40,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:16:40,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:16:40,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:16:40,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:16:40,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:16:40,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:16:40,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:16:40,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:16:40,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:16:40,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:16:40,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:16:40,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:16:40,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:16:40,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:16:40,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:16:40,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:16:40,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:16:40,295 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 [2020-07-17 12:16:40,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:16:40,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:16:40,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:16:40,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:16:40,320 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:16:40,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:16:40,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:16:40,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:16:40,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:16:40,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:16:40,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:16:40,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:16:40,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:16:40,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:16:40,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:16:40,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:16:40,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:16:40,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:16:40,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:16:40,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:16:40,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:16:40,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:16:40,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:16:40,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:16:40,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:16:40,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:16:40,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:16:40,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:16:40,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:16:40,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:16:40,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:16:40,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:16:40,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:16:40,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:16:40,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:16:40,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-17 12:16:40,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39879608e/cb10fafac4af444e8a8e2d717b4d20b2/FLAGbbe65df4d [2020-07-17 12:16:41,100 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:41,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-17 12:16:41,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39879608e/cb10fafac4af444e8a8e2d717b4d20b2/FLAGbbe65df4d [2020-07-17 12:16:41,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39879608e/cb10fafac4af444e8a8e2d717b4d20b2 [2020-07-17 12:16:41,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:41,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:41,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:41,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:41,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:41,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ad145c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41, skipping insertion in model container [2020-07-17 12:16:41,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:41,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:41,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:41,691 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:41,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:41,724 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:41,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41 WrapperNode [2020-07-17 12:16:41,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:41,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:41,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:41,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:41,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:41,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:41,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:41,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:41,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (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 [2020-07-17 12:16:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:16:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:16:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:16:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:16:41,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:41,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:41,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:42,119 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:42,120 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:16:42,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:42 BoogieIcfgContainer [2020-07-17 12:16:42,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:42,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:42,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:42,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:42,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:41" (1/3) ... [2020-07-17 12:16:42,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d4dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:42, skipping insertion in model container [2020-07-17 12:16:42,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41" (2/3) ... [2020-07-17 12:16:42,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d4dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:42, skipping insertion in model container [2020-07-17 12:16:42,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:42" (3/3) ... [2020-07-17 12:16:42,130 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-07-17 12:16:42,139 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:42,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:42,158 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:42,179 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:42,179 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:42,179 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:42,179 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:42,179 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:42,179 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:42,180 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:42,180 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-17 12:16:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 12:16:42,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:42,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:42,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1671060194, now seen corresponding path program 1 times [2020-07-17 12:16:42,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:42,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367217508] [2020-07-17 12:16:42,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367217508] [2020-07-17 12:16:42,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:42,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 12:16:42,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122444654] [2020-07-17 12:16:42,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:16:42,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:16:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:42,553 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-07-17 12:16:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:42,933 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2020-07-17 12:16:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:16:42,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-17 12:16:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:42,944 INFO L225 Difference]: With dead ends: 68 [2020-07-17 12:16:42,944 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:16:42,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:16:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:16:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-17 12:16:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 12:16:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-17 12:16:42,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2020-07-17 12:16:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:42,993 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-17 12:16:42,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:16:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-17 12:16:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:16:42,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:42,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:42,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:42,996 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:42,996 INFO L82 PathProgramCache]: Analyzing trace with hash -764881689, now seen corresponding path program 1 times [2020-07-17 12:16:42,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:42,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130883622] [2020-07-17 12:16:42,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:16:43,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130883622] [2020-07-17 12:16:43,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:43,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:16:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030451771] [2020-07-17 12:16:43,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:16:43,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:16:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:43,088 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-07-17 12:16:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,270 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-07-17 12:16:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:43,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-17 12:16:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,275 INFO L225 Difference]: With dead ends: 57 [2020-07-17 12:16:43,275 INFO L226 Difference]: Without dead ends: 38 [2020-07-17 12:16:43,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-17 12:16:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-17 12:16:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-17 12:16:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-17 12:16:43,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-07-17 12:16:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,299 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-17 12:16:43,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:16:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-17 12:16:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:16:43,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:43,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:43,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1134636734, now seen corresponding path program 1 times [2020-07-17 12:16:43,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:43,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250520896] [2020-07-17 12:16:43,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:43,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250520896] [2020-07-17 12:16:43,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650378679] [2020-07-17 12:16:43,415 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 [2020-07-17 12:16:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:16:43,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:43,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:43,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-17 12:16:43,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744927292] [2020-07-17 12:16:43,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:16:43,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:16:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:43,556 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 10 states. [2020-07-17 12:16:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,972 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-07-17 12:16:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:16:43,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-17 12:16:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,975 INFO L225 Difference]: With dead ends: 70 [2020-07-17 12:16:43,975 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 12:16:43,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:16:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 12:16:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-07-17 12:16:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 12:16:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-17 12:16:44,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 28 [2020-07-17 12:16:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:44,004 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-17 12:16:44,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:16:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-17 12:16:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 12:16:44,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:44,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:44,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:16:44,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash 848296232, now seen corresponding path program 1 times [2020-07-17 12:16:44,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:44,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710383596] [2020-07-17 12:16:44,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:16:44,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710383596] [2020-07-17 12:16:44,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:44,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:16:44,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445439036] [2020-07-17 12:16:44,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:44,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:44,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:44,279 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 5 states. [2020-07-17 12:16:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:44,357 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-07-17 12:16:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:16:44,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-17 12:16:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:44,359 INFO L225 Difference]: With dead ends: 73 [2020-07-17 12:16:44,359 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 12:16:44,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 12:16:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-17 12:16:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 12:16:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-17 12:16:44,370 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2020-07-17 12:16:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:44,371 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-17 12:16:44,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-17 12:16:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 12:16:44,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:44,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:44,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:16:44,373 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:44,374 INFO L82 PathProgramCache]: Analyzing trace with hash -670641491, now seen corresponding path program 2 times [2020-07-17 12:16:44,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:44,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001604267] [2020-07-17 12:16:44,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:16:44,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001604267] [2020-07-17 12:16:44,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093417780] [2020-07-17 12:16:44,517 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 [2020-07-17 12:16:44,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-17 12:16:44,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:44,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:16:44,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:44,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:44,630 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 12:16:44,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:44,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-07-17 12:16:44,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822600180] [2020-07-17 12:16:44,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:16:44,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:16:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:16:44,680 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-07-17 12:16:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:44,950 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-07-17 12:16:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:16:44,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-07-17 12:16:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:44,952 INFO L225 Difference]: With dead ends: 68 [2020-07-17 12:16:44,952 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:16:44,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:16:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:16:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:16:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:16:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:16:44,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-17 12:16:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:44,954 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:16:44,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:16:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:16:44,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:16:45,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:45,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:16:45,431 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:45,432 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) [2020-07-17 12:16:45,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:45,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:45,432 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:16:45,432 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:16:45,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:45,433 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:45,433 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 12:16:45,433 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:45,433 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:45,433 INFO L271 CegarLoopResult]: At program point L27(lines 14 29) the Hoare annotation is: true [2020-07-17 12:16:45,433 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 29) no Hoare annotation was computed. [2020-07-17 12:16:45,434 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-07-17 12:16:45,434 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 26) the Hoare annotation is: (let ((.cse1 (<= 1 main_~i~0))) (or (and (let ((.cse0 (<= main_~i~0 1))) (or (and .cse0 (<= main_~j~0 (* 2 main_~i~0))) (and .cse0 (<= main_~j~0 (+ main_~k~0 1))))) .cse1) (and (<= 2 main_~n~0) .cse1) (and (<= main_~i~0 0) (<= 0 main_~i~0)))) [2020-07-17 12:16:45,434 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-17 12:16:45,434 INFO L268 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-07-17 12:16:45,434 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (let ((.cse3 (* 2 main_~i~0))) (let ((.cse4 (<= .cse3 main_~j~0))) (or (and (let ((.cse0 (<= main_~i~0 0)) (.cse1 (<= 0 main_~i~0)) (.cse2 (<= 1 main_~n~0))) (or (and .cse0 .cse1 .cse2 (<= main_~j~0 .cse3)) (and .cse0 .cse1 .cse2 (<= main_~j~0 (+ main_~k~0 1))))) .cse4) (and (< main_~i~0 main_~n~0) (<= 1 main_~i~0) .cse4)))) [2020-07-17 12:16:45,435 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-17 12:16:45,435 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (and (< main_~i~0 main_~n~0) (< main_~j~0 (* 3 main_~i~0)) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-17 12:16:45,435 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-17 12:16:45,435 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 29) no Hoare annotation was computed. [2020-07-17 12:16:45,435 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 29) the Hoare annotation is: true [2020-07-17 12:16:45,435 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (< main_~i~0 main_~n~0) (< main_~j~0 (* 3 main_~i~0)) (<= (+ main_~k~0 1) main_~j~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-17 12:16:45,436 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 26) no Hoare annotation was computed. [2020-07-17 12:16:45,436 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-17 12:16:45,436 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-17 12:16:45,436 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 12:16:45,436 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:45,436 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-17 12:16:45,437 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-17 12:16:45,437 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:45,437 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-17 12:16:45,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:45 BoogieIcfgContainer [2020-07-17 12:16:45,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:45,460 INFO L168 Benchmark]: Toolchain (without parser) took 3963.41 ms. Allocated memory was 140.0 MB in the beginning and 243.8 MB in the end (delta: 103.8 MB). Free memory was 103.8 MB in the beginning and 108.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,461 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 93.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,463 INFO L168 Benchmark]: Boogie Preprocessor took 29.67 ms. Allocated memory is still 140.0 MB. Free memory was 93.8 MB in the beginning and 92.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,464 INFO L168 Benchmark]: RCFGBuilder took 367.77 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 169.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,465 INFO L168 Benchmark]: TraceAbstraction took 3333.38 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 168.7 MB in the beginning and 108.1 MB in the end (delta: 60.5 MB). Peak memory consumption was 99.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:45,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 93.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.67 ms. Allocated memory is still 140.0 MB. Free memory was 93.8 MB in the beginning and 92.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.77 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 169.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3333.38 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 168.7 MB in the beginning and 108.1 MB in the end (delta: 60.5 MB). Peak memory consumption was 99.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (i < n && j < 3 * i) && 2 * i <= j - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((i <= 1 && j <= 2 * i) || (i <= 1 && j <= k + 1)) && 1 <= i) || (2 <= n && 1 <= i)) || (i <= 0 && 0 <= i) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((i <= 0 && 0 <= i) && 1 <= n) && j <= 2 * i) || (((i <= 0 && 0 <= i) && 1 <= n) && j <= k + 1)) && 2 * i <= j) || ((i < n && 1 <= i) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 214 SDslu, 184 SDs, 0 SdLazy, 597 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, 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, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 23 PreInvPairs, 43 NumberOfFragments, 129 HoareAnnotationTreeSize, 23 FomulaSimplifications, 1091 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 176 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 215 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 15510 SizeOfPredicates, 6 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 67/88 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...