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/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:50:33,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:50:33,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:50:33,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:50:33,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:50:33,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:50:33,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:50:33,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:50:33,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:50:33,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:50:33,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:50:33,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:50:33,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:50:33,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:50:33,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:50:33,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:50:33,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:50:33,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:50:33,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:50:33,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:50:33,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:50:33,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:50:33,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:50:33,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:50:33,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:50:33,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:50:33,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:50:33,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:50:33,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:50:33,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:50:33,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:50:33,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:50:33,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:50:33,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:50:33,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:50:33,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:50:33,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:50:33,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:50:33,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:50:33,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:50:33,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:50:33,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:50:33,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:50:33,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:50:33,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:50:33,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:50:33,629 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:50:33,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:50:33,629 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:50:33,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:50:33,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:50:33,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:50:33,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:50:33,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:50:33,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:50:33,631 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:50:33,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:50:33,631 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:50:33,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:50:33,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:50:33,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:50:33,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:50:33,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:50:33,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:33,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:50:33,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:50:33,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:50:33,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:50:33,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:50:33,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:50:33,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:50:33,916 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:50:33,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:50:33,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:50:33,933 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:50:33,934 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:50:33,934 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2019-10-13 17:50:33,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe634fd2/7588d4574ba84753942cffc496f1e8ba/FLAGb4e66f9f8 [2019-10-13 17:50:34,400 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:50:34,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2019-10-13 17:50:34,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe634fd2/7588d4574ba84753942cffc496f1e8ba/FLAGb4e66f9f8 [2019-10-13 17:50:34,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe634fd2/7588d4574ba84753942cffc496f1e8ba [2019-10-13 17:50:34,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:50:34,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:50:34,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:34,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:50:34,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:50:34,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:34" (1/1) ... [2019-10-13 17:50:34,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7e0ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:34, skipping insertion in model container [2019-10-13 17:50:34,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:34" (1/1) ... [2019-10-13 17:50:34,776 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:50:34,796 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:50:35,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:35,046 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:50:35,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:35,192 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:50:35,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35 WrapperNode [2019-10-13 17:50:35,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:35,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:50:35,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:50:35,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:50:35,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... [2019-10-13 17:50:35,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:50:35,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:50:35,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:50:35,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:50:35,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:35,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:50:35,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:50:35,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:50:35,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:50:35,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:50:35,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:50:35,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:50:35,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:50:35,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:50:35,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:50:35,697 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:50:35,698 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:50:35,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:35 BoogieIcfgContainer [2019-10-13 17:50:35,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:50:35,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:50:35,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:50:35,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:50:35,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:50:34" (1/3) ... [2019-10-13 17:50:35,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27834154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:35, skipping insertion in model container [2019-10-13 17:50:35,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:35" (2/3) ... [2019-10-13 17:50:35,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27834154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:35, skipping insertion in model container [2019-10-13 17:50:35,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:35" (3/3) ... [2019-10-13 17:50:35,707 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-10-13 17:50:35,716 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:50:35,723 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:50:35,740 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:50:35,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:50:35,765 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:50:35,765 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:50:35,765 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:50:35,765 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:50:35,765 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:50:35,766 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:50:35,766 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:50:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-13 17:50:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:50:35,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:35,791 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:35,793 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1961398023, now seen corresponding path program 1 times [2019-10-13 17:50:35,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:35,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851804571] [2019-10-13 17:50:35,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:35,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:35,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:36,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851804571] [2019-10-13 17:50:36,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:36,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:36,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405895998] [2019-10-13 17:50:36,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:36,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:36,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:36,031 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-13 17:50:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:36,221 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2019-10-13 17:50:36,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:36,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-10-13 17:50:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:36,234 INFO L225 Difference]: With dead ends: 78 [2019-10-13 17:50:36,234 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 17:50:36,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 17:50:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 17:50:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:50:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-10-13 17:50:36,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 22 [2019-10-13 17:50:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:36,277 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-10-13 17:50:36,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-10-13 17:50:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:50:36,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:36,279 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:36,280 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1084797805, now seen corresponding path program 1 times [2019-10-13 17:50:36,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:36,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91774254] [2019-10-13 17:50:36,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:36,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:36,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:36,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91774254] [2019-10-13 17:50:36,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:36,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:50:36,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830721092] [2019-10-13 17:50:36,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:50:36,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:50:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:50:36,439 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 6 states. [2019-10-13 17:50:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:36,605 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-10-13 17:50:36,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:50:36,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-13 17:50:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:36,607 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:50:36,607 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 17:50:36,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:50:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 17:50:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-13 17:50:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:50:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-13 17:50:36,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2019-10-13 17:50:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:36,619 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-13 17:50:36,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:50:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-13 17:50:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:50:36,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:36,621 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:36,621 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1082950763, now seen corresponding path program 1 times [2019-10-13 17:50:36,623 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:36,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190631548] [2019-10-13 17:50:36,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:36,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:36,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:36,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190631548] [2019-10-13 17:50:36,835 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:36,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:50:36,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179466143] [2019-10-13 17:50:36,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:50:36,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:50:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:50:36,837 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2019-10-13 17:50:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:37,041 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-10-13 17:50:37,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:50:37,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-13 17:50:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:37,047 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:50:37,047 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:50:37,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:50:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:50:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-13 17:50:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:50:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2019-10-13 17:50:37,070 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 22 [2019-10-13 17:50:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:37,070 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2019-10-13 17:50:37,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:50:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2019-10-13 17:50:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:50:37,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:37,073 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:37,074 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1675538566, now seen corresponding path program 1 times [2019-10-13 17:50:37,075 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:37,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002241127] [2019-10-13 17:50:37,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:37,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:37,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:37,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002241127] [2019-10-13 17:50:37,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994668459] [2019-10-13 17:50:37,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:37,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:50:37,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:37,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:50:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:37,403 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:37,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-10-13 17:50:37,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408367840] [2019-10-13 17:50:37,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:50:37,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:50:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:50:37,406 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 9 states. [2019-10-13 17:50:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:37,642 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2019-10-13 17:50:37,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:50:37,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-13 17:50:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:37,647 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:50:37,647 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:50:37,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:50:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:50:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2019-10-13 17:50:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:50:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-10-13 17:50:37,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 26 [2019-10-13 17:50:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:37,675 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-10-13 17:50:37,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:50:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-10-13 17:50:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:50:37,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:37,679 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:37,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:37,883 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1636442583, now seen corresponding path program 1 times [2019-10-13 17:50:37,883 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:37,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182462401] [2019-10-13 17:50:37,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:37,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:37,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:50:38,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182462401] [2019-10-13 17:50:38,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:38,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:50:38,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653942455] [2019-10-13 17:50:38,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:50:38,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:50:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:38,031 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 4 states. [2019-10-13 17:50:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:38,123 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-10-13 17:50:38,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:50:38,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-13 17:50:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:38,124 INFO L225 Difference]: With dead ends: 69 [2019-10-13 17:50:38,125 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:50:38,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:50:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-13 17:50:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:50:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-13 17:50:38,133 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2019-10-13 17:50:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:38,134 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-13 17:50:38,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:50:38,134 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-13 17:50:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:50:38,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:38,136 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:38,136 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash -935378005, now seen corresponding path program 1 times [2019-10-13 17:50:38,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:38,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839129271] [2019-10-13 17:50:38,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:38,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:38,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:38,833 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2019-10-13 17:50:39,064 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2019-10-13 17:50:39,192 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-10-13 17:50:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:39,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839129271] [2019-10-13 17:50:39,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354568957] [2019-10-13 17:50:39,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:39,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:50:39,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:39,885 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-13 17:50:39,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:39,899 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:39,901 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:39,901 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-13 17:50:40,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:40,142 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 17:50:40,148 INFO L168 Benchmark]: Toolchain (without parser) took 5387.05 ms. Allocated memory was 134.7 MB in the beginning and 255.3 MB in the end (delta: 120.6 MB). Free memory was 97.8 MB in the beginning and 161.6 MB in the end (delta: -63.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,151 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory was 116.7 MB in the beginning and 116.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.80 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 97.6 MB in the beginning and 175.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,160 INFO L168 Benchmark]: Boogie Preprocessor took 72.53 ms. Allocated memory is still 198.2 MB. Free memory was 175.7 MB in the beginning and 172.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,161 INFO L168 Benchmark]: RCFGBuilder took 433.69 ms. Allocated memory is still 198.2 MB. Free memory was 172.9 MB in the beginning and 151.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,163 INFO L168 Benchmark]: TraceAbstraction took 4444.93 ms. Allocated memory was 198.2 MB in the beginning and 255.3 MB in the end (delta: 57.1 MB). Free memory was 151.5 MB in the beginning and 161.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:40,172 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory was 116.7 MB in the beginning and 116.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 431.80 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 97.6 MB in the beginning and 175.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.53 ms. Allocated memory is still 198.2 MB. Free memory was 175.7 MB in the beginning and 172.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.69 ms. Allocated memory is still 198.2 MB. Free memory was 172.9 MB in the beginning and 151.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4444.93 ms. Allocated memory was 198.2 MB in the beginning and 255.3 MB in the end (delta: 57.1 MB). Free memory was 151.5 MB in the beginning and 161.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.NullPointerException de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.NullPointerException: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...