/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/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:57:51,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:57:51,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:57:51,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:57:51,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:57:51,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:57:51,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:57:51,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:57:51,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:57:51,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:57:51,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:57:51,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:57:51,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:57:51,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:57:51,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:57:51,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:57:51,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:57:51,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:57:51,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:57:51,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:57:51,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:57:51,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:57:51,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:57:51,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:57:51,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:57:51,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:57:51,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:57:51,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:57:51,916 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 [2020-08-22 16:57:51,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:57:51,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:57:51,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:57:51,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:57:51,960 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:57:51,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:57:51,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:57:51,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:57:51,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:57:51,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:57:51,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:57:51,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:57:51,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:57:51,963 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:57:51,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:57:51,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:57:51,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:57:51,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:57:51,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:57:51,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:57:51,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:57:51,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:51,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:57:51,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:57:51,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:57:51,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:57:51,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:57:51,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:57:51,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:57:51,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:57:52,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:57:52,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:57:52,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:57:52,315 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:57:52,316 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:57:52,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-22 16:57:52,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165fc4226/767bc44a07cd4061af2a093c8a88e418/FLAG2c0cba108 [2020-08-22 16:57:52,829 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:57:52,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-22 16:57:52,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165fc4226/767bc44a07cd4061af2a093c8a88e418/FLAG2c0cba108 [2020-08-22 16:57:53,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165fc4226/767bc44a07cd4061af2a093c8a88e418 [2020-08-22 16:57:53,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:53,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:53,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:53,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:53,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:53,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a007d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53, skipping insertion in model container [2020-08-22 16:57:53,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:53,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:53,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:53,476 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:53,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:53,509 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:53,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53 WrapperNode [2020-08-22 16:57:53,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:53,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:53,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:53,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:53,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (1/1) ... [2020-08-22 16:57:53,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:53,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:53,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:53,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:53,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (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 [2020-08-22 16:57:53,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:57:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:53,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:53,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:53,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:53,924 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:57:53,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:53 BoogieIcfgContainer [2020-08-22 16:57:53,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:53,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:53,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:53,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:53,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:53" (1/3) ... [2020-08-22 16:57:53,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399fdfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:53, skipping insertion in model container [2020-08-22 16:57:53,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:53" (2/3) ... [2020-08-22 16:57:53,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399fdfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:53, skipping insertion in model container [2020-08-22 16:57:53,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:53" (3/3) ... [2020-08-22 16:57:53,937 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-08-22 16:57:53,948 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:53,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:53,973 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:54,007 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:54,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:54,008 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:54,008 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:54,008 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:54,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:54,009 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:54,009 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 16:57:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:57:54,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:54,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:54,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-08-22 16:57:54,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:54,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654502123] [2020-08-22 16:57:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:54,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654502123] [2020-08-22 16:57:54,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:54,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:57:54,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323568497] [2020-08-22 16:57:54,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:54,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:54,299 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-08-22 16:57:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:54,407 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-08-22 16:57:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:54,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-22 16:57:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:54,419 INFO L225 Difference]: With dead ends: 57 [2020-08-22 16:57:54,419 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 16:57:54,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 16:57:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 16:57:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 16:57:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 16:57:54,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-08-22 16:57:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:54,471 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 16:57:54,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 16:57:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:57:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:54,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:54,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:54,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-08-22 16:57:54,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:54,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095766730] [2020-08-22 16:57:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:54,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095766730] [2020-08-22 16:57:54,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:54,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:57:54,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46584758] [2020-08-22 16:57:54,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:54,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:54,576 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-22 16:57:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:54,719 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-22 16:57:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:54,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 16:57:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:54,722 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:57:54,722 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 16:57:54,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 16:57:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-08-22 16:57:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 16:57:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-22 16:57:54,733 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-08-22 16:57:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:54,734 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-22 16:57:54,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-22 16:57:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:57:54,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:54,735 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:54,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:57:54,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-08-22 16:57:54,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:54,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851645283] [2020-08-22 16:57:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 16:57:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:54,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851645283] [2020-08-22 16:57:54,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:54,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:57:54,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022333660] [2020-08-22 16:57:54,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:54,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:54,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:54,847 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-08-22 16:57:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:54,919 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-08-22 16:57:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:54,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 16:57:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:54,921 INFO L225 Difference]: With dead ends: 45 [2020-08-22 16:57:54,921 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 16:57:54,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 16:57:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 16:57:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 16:57:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-08-22 16:57:54,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-08-22 16:57:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:54,935 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-08-22 16:57:54,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-08-22 16:57:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:57:54,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:54,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:54,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:57:54,937 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-08-22 16:57:54,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:54,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27352757] [2020-08-22 16:57:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 16:57:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:55,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27352757] [2020-08-22 16:57:55,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:55,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:57:55,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100288827] [2020-08-22 16:57:55,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:55,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:55,014 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-08-22 16:57:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:55,158 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-08-22 16:57:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:55,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 16:57:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:55,160 INFO L225 Difference]: With dead ends: 97 [2020-08-22 16:57:55,160 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 16:57:55,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 16:57:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-08-22 16:57:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 16:57:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-22 16:57:55,174 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-08-22 16:57:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:55,174 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-22 16:57:55,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-22 16:57:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:57:55,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:55,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:55,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:57:55,177 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-08-22 16:57:55,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:55,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162596766] [2020-08-22 16:57:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:57:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:57:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:57:55,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162596766] [2020-08-22 16:57:55,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427723725] [2020-08-22 16:57:55,245 INFO L95 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 [2020-08-22 16:57:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:55,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-08-22 16:57:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340535147] [2020-08-22 16:57:55,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:55,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:55,358 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2020-08-22 16:57:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:55,431 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-08-22 16:57:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:55,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-22 16:57:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:55,433 INFO L225 Difference]: With dead ends: 80 [2020-08-22 16:57:55,433 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 16:57:55,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 16:57:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-08-22 16:57:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:57:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-08-22 16:57:55,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2020-08-22 16:57:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:55,446 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-08-22 16:57:55,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-08-22 16:57:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:57:55,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:55,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:55,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:55,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-08-22 16:57:55,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:55,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993399818] [2020-08-22 16:57:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:57:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 16:57:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:57:55,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993399818] [2020-08-22 16:57:55,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120934934] [2020-08-22 16:57:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:57:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:55,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:55,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-08-22 16:57:55,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604298621] [2020-08-22 16:57:55,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:57:55,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:57:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:57:55,947 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 13 states. [2020-08-22 16:57:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:56,168 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-08-22 16:57:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:57:56,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-22 16:57:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:56,170 INFO L225 Difference]: With dead ends: 120 [2020-08-22 16:57:56,170 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 16:57:56,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:57:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 16:57:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-08-22 16:57:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 16:57:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-22 16:57:56,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 34 [2020-08-22 16:57:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:56,185 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-22 16:57:56,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:57:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-22 16:57:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:57:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:56,187 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:56,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:56,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-08-22 16:57:56,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:56,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029693655] [2020-08-22 16:57:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:56,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:57:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:56,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:57:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:56,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:57:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 16:57:56,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029693655] [2020-08-22 16:57:56,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:56,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:57:56,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525829931] [2020-08-22 16:57:56,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:56,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:56,520 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-08-22 16:57:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:56,590 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-22 16:57:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:56,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 16:57:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:56,592 INFO L225 Difference]: With dead ends: 56 [2020-08-22 16:57:56,592 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:57:56,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:57:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:57:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:57:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:57:56,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-08-22 16:57:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:56,604 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:57:56,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:57:56,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:57:56,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:57:56,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:57:56,941 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:57:56,942 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:56,942 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:56,942 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:57:56,942 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:57:56,942 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:57:56,942 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-08-22 16:57:56,943 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= .cse2 main_~j~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 .cse1 (<= main_~k~0 main_~n~0)) (and (<= main_~i~0 0) .cse0 .cse1 (<= main_~k~0 (+ .cse2 1)) (<= main_~k~0 main_~j~0))))) [2020-08-22 16:57:56,943 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-08-22 16:57:56,944 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-08-22 16:57:56,944 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-22 16:57:56,944 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-08-22 16:57:56,944 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 16:57:56,944 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-08-22 16:57:56,944 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 16:57:56,945 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-08-22 16:57:56,945 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-08-22 16:57:56,945 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-08-22 16:57:56,945 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse2 (<= main_~n~0 main_~j~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and (<= main_~i~0 0) .cse0 .cse1) (let ((.cse3 (div (+ (* main_~n~0 (- 1)) 1) (- 2)))) (and .cse2 .cse0 (<= (+ .cse3 1) main_~i~0) (<= .cse3 0) (<= main_~k~0 main_~i~0))) (and .cse2 .cse0 .cse1))) [2020-08-22 16:57:56,945 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-08-22 16:57:56,946 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-08-22 16:57:56,946 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-08-22 16:57:56,946 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 16:57:56,946 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-22 16:57:56,946 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 16:57:56,946 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-22 16:57:56,946 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-22 16:57:56,947 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-22 16:57:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:56 BoogieIcfgContainer [2020-08-22 16:57:56,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:56,971 INFO L168 Benchmark]: Toolchain (without parser) took 3749.57 ms. Allocated memory was 146.8 MB in the beginning and 244.3 MB in the end (delta: 97.5 MB). Free memory was 102.1 MB in the beginning and 168.4 MB in the end (delta: -66.4 MB). Peak memory consumption was 31.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,972 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.92 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,974 INFO L168 Benchmark]: Boogie Preprocessor took 120.94 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,975 INFO L168 Benchmark]: RCFGBuilder took 296.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,976 INFO L168 Benchmark]: TraceAbstraction took 3037.78 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 165.2 MB in the beginning and 168.4 MB in the end (delta: -3.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:56,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.92 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.94 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3037.78 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 165.2 MB in the beginning and 168.4 MB in the end (delta: -3.2 MB). Peak memory consumption was 38.8 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: 25]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((i <= 0 && n <= k) && k <= n) || ((((n <= j && n <= k) && (n * -1 + 1) / -2 + 1 <= i) && (n * -1 + 1) / -2 <= 0) && k <= i)) || ((n <= j && n <= k) && k <= n) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((2 * i <= j && n <= k) && k <= n) || ((((i <= 0 && 2 * i <= j) && n <= k) && k <= 2 * i + 1) && k <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 96 SDslu, 493 SDs, 0 SdLazy, 375 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 56 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 33 PreInvPairs, 56 NumberOfFragments, 166 HoareAnnotationTreeSize, 33 FomulaSimplifications, 1880 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 373 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 14154 SizeOfPredicates, 7 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 73/81 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...