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-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:34,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:34,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:34,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:34,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:34,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:34,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:34,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:34,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:34,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:34,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:34,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:34,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:34,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:34,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:34,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:34,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:34,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:34,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:34,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:34,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:34,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:34,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:34,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:34,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:34,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:34,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:34,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:34,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:34,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:34,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:34,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:34,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:34,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:34,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:34,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:34,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:15:34,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:34,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:34,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:34,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:34,840 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:34,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:34,841 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:34,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:34,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:34,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:34,842 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:34,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:34,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:34,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:34,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:34,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:34,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:34,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:34,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:34,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:34,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:34,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:34,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:34,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:35,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:35,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:35,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:35,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:35,127 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:35,127 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-14 23:15:35,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2d490eba/610dd2c0fd5640d49afdd5f00c6d8e5e/FLAG6c4ec34ae [2019-10-14 23:15:35,675 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:35,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-14 23:15:35,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2d490eba/610dd2c0fd5640d49afdd5f00c6d8e5e/FLAG6c4ec34ae [2019-10-14 23:15:36,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2d490eba/610dd2c0fd5640d49afdd5f00c6d8e5e [2019-10-14 23:15:36,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:36,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:36,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:36,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:36,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:36,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a84088d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36, skipping insertion in model container [2019-10-14 23:15:36,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,083 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:36,100 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:36,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:36,280 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:36,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:36,314 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:36,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36 WrapperNode [2019-10-14 23:15:36,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:36,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:36,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:36,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:36,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... [2019-10-14 23:15:36,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:36,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:36,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:36,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:36,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:36,685 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:36,685 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:15:36,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:36 BoogieIcfgContainer [2019-10-14 23:15:36,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:36,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:36,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:36,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:36,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:36" (1/3) ... [2019-10-14 23:15:36,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d341470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:36, skipping insertion in model container [2019-10-14 23:15:36,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:36" (2/3) ... [2019-10-14 23:15:36,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d341470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:36, skipping insertion in model container [2019-10-14 23:15:36,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:36" (3/3) ... [2019-10-14 23:15:36,695 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-10-14 23:15:36,703 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:36,710 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:36,722 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:36,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:36,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:36,748 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:36,748 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:36,748 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:36,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:36,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:36,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-14 23:15:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:15:36,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:36,769 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:36,771 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2019-10-14 23:15:36,783 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:36,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769453020] [2019-10-14 23:15:36,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:36,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:36,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:36,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769453020] [2019-10-14 23:15:36,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:36,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:15:36,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989406319] [2019-10-14 23:15:36,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:15:36,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:15:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:36,902 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-14 23:15:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:36,922 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-10-14 23:15:36,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:15:36,924 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-14 23:15:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:36,931 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:15:36,932 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:15:36,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:15:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-14 23:15:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:15:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-14 23:15:36,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-10-14 23:15:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:36,969 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-14 23:15:36,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:15:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-14 23:15:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:15:36,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:36,970 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:36,971 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2019-10-14 23:15:36,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:36,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347080176] [2019-10-14 23:15:36,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:36,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:36,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:37,297 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-10-14 23:15:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:37,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347080176] [2019-10-14 23:15:37,322 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:37,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:15:37,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381032041] [2019-10-14 23:15:37,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:15:37,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:37,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:15:37,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:37,326 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-10-14 23:15:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:37,381 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-14 23:15:37,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:15:37,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-14 23:15:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:37,383 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:15:37,383 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:15:37,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:15:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:15:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:15:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-14 23:15:37,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-10-14 23:15:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:37,389 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-14 23:15:37,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:15:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-14 23:15:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:37,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:37,391 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:37,391 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2019-10-14 23:15:37,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:37,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442246571] [2019-10-14 23:15:37,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:37,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:37,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,790 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2019-10-14 23:15:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442246571] [2019-10-14 23:15:39,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218006985] [2019-10-14 23:15:39,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:15:39,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,023 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 23:15:40,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195223327] [2019-10-14 23:15:40,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:15:40,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:15:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:40,026 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2019-10-14 23:15:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,097 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-10-14 23:15:40,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:40,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-10-14 23:15:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,098 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:15:40,098 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:40,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-10-14 23:15:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-14 23:15:40,104 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2019-10-14 23:15:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,104 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-14 23:15:40,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:15:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-14 23:15:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:40,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,106 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,310 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash -945074988, now seen corresponding path program 1 times [2019-10-14 23:15:40,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472642549] [2019-10-14 23:15:40,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:15:40,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472642549] [2019-10-14 23:15:40,354 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:40,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:15:40,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885360740] [2019-10-14 23:15:40,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:15:40,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:15:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:40,356 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-10-14 23:15:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,366 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-10-14 23:15:40,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:15:40,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 23:15:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,368 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:15:40,368 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:40,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 23:15:40,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2019-10-14 23:15:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,373 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 23:15:40,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:15:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 23:15:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:15:40,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,374 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,374 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1104392731, now seen corresponding path program 2 times [2019-10-14 23:15:40,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19553161] [2019-10-14 23:15:40,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19553161] [2019-10-14 23:15:40,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43829169] [2019-10-14 23:15:40,744 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:40,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:40,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:15:40,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,969 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-14 23:15:40,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644177241] [2019-10-14 23:15:40,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:40,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:40,972 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 16 states. [2019-10-14 23:15:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:41,081 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-14 23:15:41,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:15:41,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-10-14 23:15:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:41,083 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:15:41,083 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:15:41,084 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:15:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:15:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:15:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:15:41,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2019-10-14 23:15:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:41,091 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:15:41,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:15:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:15:41,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:41,094 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:41,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,298 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1468987726, now seen corresponding path program 3 times [2019-10-14 23:15:41,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:41,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476394647] [2019-10-14 23:15:41,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:41,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476394647] [2019-10-14 23:15:41,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444511589] [2019-10-14 23:15:41,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:15:41,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:41,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 23:15:41,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:42,254 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:42,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-10-14 23:15:42,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361259686] [2019-10-14 23:15:42,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:15:42,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:42,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:15:42,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:42,257 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 20 states. [2019-10-14 23:15:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:44,759 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2019-10-14 23:15:44,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:44,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2019-10-14 23:15:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:44,761 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:15:44,761 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:15:44,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:15:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:15:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:15:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:15:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-10-14 23:15:44,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-10-14 23:15:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:44,767 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-10-14 23:15:44,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:15:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-10-14 23:15:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:15:44,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:44,772 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:44,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:44,975 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash 755794836, now seen corresponding path program 1 times [2019-10-14 23:15:44,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:44,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588588048] [2019-10-14 23:15:44,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:44,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:44,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:45,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588588048] [2019-10-14 23:15:45,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381353208] [2019-10-14 23:15:45,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:15:45,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:15:45,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:45,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2019-10-14 23:15:45,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043534112] [2019-10-14 23:15:45,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:45,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:45,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:45,364 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2019-10-14 23:15:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:45,504 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-14 23:15:45,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:15:45,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-14 23:15:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:45,505 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:15:45,505 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:15:45,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:15:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:15:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:15:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-14 23:15:45,519 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2019-10-14 23:15:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:45,520 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-14 23:15:45,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-14 23:15:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:15:45,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:45,521 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:45,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:45,722 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -306838693, now seen corresponding path program 4 times [2019-10-14 23:15:45,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:45,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998334282] [2019-10-14 23:15:45,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:46,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998334282] [2019-10-14 23:15:46,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612501724] [2019-10-14 23:15:46,447 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:46,484 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:46,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:46,485 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-14 23:15:46,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:47,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:47,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2019-10-14 23:15:47,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679416504] [2019-10-14 23:15:47,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:15:47,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:15:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:15:47,020 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2019-10-14 23:15:49,342 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2019-10-14 23:15:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:49,684 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-10-14 23:15:49,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:15:49,689 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2019-10-14 23:15:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:49,689 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:15:49,689 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:15:49,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:15:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:15:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:15:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:15:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:15:49,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-10-14 23:15:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:49,691 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:15:49,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:15:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:15:49,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:15:49,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:49,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:15:49,958 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:15:49,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:49,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:49,959 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:15:49,959 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:15:49,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2019-10-14 23:15:49,960 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2019-10-14 23:15:49,961 INFO L439 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (= (+ main_~a~0 (* 4294967296 (div main_~b~0 4294967296))) (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0)) [2019-10-14 23:15:49,961 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2019-10-14 23:15:49,961 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-10-14 23:15:49,961 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:15:49,964 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:49,964 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:15:49,964 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:15:49,965 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:15:49,965 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:49,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:15:49 BoogieIcfgContainer [2019-10-14 23:15:49,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:15:49,972 INFO L168 Benchmark]: Toolchain (without parser) took 13906.08 ms. Allocated memory was 141.0 MB in the beginning and 269.0 MB in the end (delta: 127.9 MB). Free memory was 103.4 MB in the beginning and 124.9 MB in the end (delta: -21.5 MB). Peak memory consumption was 106.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,973 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 141.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.13 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,976 INFO L168 Benchmark]: Boogie Preprocessor took 114.58 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.6 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,982 INFO L168 Benchmark]: RCFGBuilder took 256.27 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,982 INFO L168 Benchmark]: TraceAbstraction took 13282.51 ms. Allocated memory was 202.9 MB in the beginning and 269.0 MB in the end (delta: 66.1 MB). Free memory was 169.3 MB in the beginning and 124.9 MB in the end (delta: 44.3 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:49,993 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 141.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.13 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.58 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.6 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.27 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13282.51 ms. Allocated memory was 202.9 MB in the beginning and 269.0 MB in the end (delta: 66.1 MB). Free memory was 169.3 MB in the beginning and 124.9 MB in the end (delta: 44.3 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 13.2s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 66 SDslu, 741 SDs, 0 SdLazy, 578 SolverSat, 32 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 18 PreInvPairs, 26 NumberOfFragments, 20 HoareAnnotationTreeSize, 18 FomulaSimplifications, 98 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 61252 SizeOfPredicates, 13 NumberOfNonLiveVariables, 405 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 32/244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...