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/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:50:29,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:50:29,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:50:29,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:50:29,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:50:29,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:50:29,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:50:29,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:50:29,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:50:29,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:50:29,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:50:29,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:50:29,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:50:29,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:50:29,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:50:29,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:50:29,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:50:29,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:50:29,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:50:29,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:50:29,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:50:29,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:50:29,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:50:29,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:50:29,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:50:29,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:50:29,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:50:29,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:50:29,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:50:29,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:50:29,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:50:29,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:50:29,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:50:29,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:50:29,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:50:29,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:50:29,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:50:29,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:50:29,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:50:29,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:50:29,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:50:29,543 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 17:50:29,562 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:50:29,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:50:29,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:50:29,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:50:29,564 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:50:29,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:50:29,564 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:50:29,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:50:29,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:50:29,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:50:29,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:50:29,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:50:29,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:50:29,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:50:29,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:50:29,567 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:50:29,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:50:29,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:50:29,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:50:29,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:50:29,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:50:29,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:29,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:50:29,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:50:29,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:50:29,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:50:29,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:50:29,912 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:50:29,912 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:50:29,913 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2019-10-13 17:50:29,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49fab0fcb/d7a0b7970cb54fe982be2b695ce18b0a/FLAG09905d08a [2019-10-13 17:50:30,427 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:50:30,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2019-10-13 17:50:30,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49fab0fcb/d7a0b7970cb54fe982be2b695ce18b0a/FLAG09905d08a [2019-10-13 17:50:30,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49fab0fcb/d7a0b7970cb54fe982be2b695ce18b0a [2019-10-13 17:50:30,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:50:30,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:50:30,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:30,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:50:30,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:50:30,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:30" (1/1) ... [2019-10-13 17:50:30,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:30, skipping insertion in model container [2019-10-13 17:50:30,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:30" (1/1) ... [2019-10-13 17:50:30,874 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:50:30,892 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:50:31,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:31,084 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:50:31,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:31,213 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:50:31,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31 WrapperNode [2019-10-13 17:50:31,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:31,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:50:31,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:50:31,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:50:31,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (1/1) ... [2019-10-13 17:50:31,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:50:31,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:50:31,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:50:31,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:50:31,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (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 17:50:31,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:50:31,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:50:31,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:50:31,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:50:31,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:50:31,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:50:31,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:50:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:50:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:50:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:50:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:50:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:50:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:50:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:50:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:50:31,691 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:50:31,691 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 17:50:31,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:31 BoogieIcfgContainer [2019-10-13 17:50:31,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:50:31,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:50:31,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:50:31,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:50:31,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:50:30" (1/3) ... [2019-10-13 17:50:31,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216c254d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:31, skipping insertion in model container [2019-10-13 17:50:31,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:31" (2/3) ... [2019-10-13 17:50:31,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216c254d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:31, skipping insertion in model container [2019-10-13 17:50:31,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:31" (3/3) ... [2019-10-13 17:50:31,700 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2019-10-13 17:50:31,709 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:50:31,721 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:50:31,735 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:50:31,760 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:50:31,761 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:50:31,761 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:50:31,761 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:50:31,761 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:50:31,761 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:50:31,761 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:50:31,761 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:50:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-13 17:50:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:50:31,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:31,783 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] [2019-10-13 17:50:31,785 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1164915713, now seen corresponding path program 1 times [2019-10-13 17:50:31,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:31,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785190495] [2019-10-13 17:50:31,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:31,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:31,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:31,997 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 17:50:31,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785190495] [2019-10-13 17:50:31,999 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:31,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:32,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494266682] [2019-10-13 17:50:32,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:32,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:32,017 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2019-10-13 17:50:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:32,174 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2019-10-13 17:50:32,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:32,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 17:50:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:32,188 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:50:32,188 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:50:32,191 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 17:50:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:50:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-13 17:50:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:50:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:50:32,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2019-10-13 17:50:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:32,229 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:50:32,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:50:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:50:32,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:32,231 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] [2019-10-13 17:50:32,231 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash 208061977, now seen corresponding path program 1 times [2019-10-13 17:50:32,232 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:32,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261464372] [2019-10-13 17:50:32,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:32,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:32,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:32,369 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 17:50:32,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261464372] [2019-10-13 17:50:32,370 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:32,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:50:32,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525061063] [2019-10-13 17:50:32,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:50:32,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:50:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:50:32,373 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2019-10-13 17:50:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:32,543 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-10-13 17:50:32,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:50:32,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:50:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:32,546 INFO L225 Difference]: With dead ends: 42 [2019-10-13 17:50:32,546 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 17:50:32,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:50:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 17:50:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-13 17:50:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:50:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-10-13 17:50:32,567 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2019-10-13 17:50:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:32,568 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-10-13 17:50:32,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:50:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-10-13 17:50:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:50:32,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:32,572 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] [2019-10-13 17:50:32,572 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 209909019, now seen corresponding path program 1 times [2019-10-13 17:50:32,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:32,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344893945] [2019-10-13 17:50:32,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:32,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:32,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:32,987 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 17:50:32,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344893945] [2019-10-13 17:50:32,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:32,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:50:32,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25710548] [2019-10-13 17:50:32,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:50:32,992 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:50:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:50:32,995 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2019-10-13 17:50:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:33,231 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-10-13 17:50:33,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:50:33,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 17:50:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:33,235 INFO L225 Difference]: With dead ends: 70 [2019-10-13 17:50:33,236 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 17:50:33,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:50:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 17:50:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-13 17:50:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:50:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-13 17:50:33,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2019-10-13 17:50:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:33,245 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-13 17:50:33,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:50:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-13 17:50:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:50:33,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:33,247 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] [2019-10-13 17:50:33,247 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2624448, now seen corresponding path program 1 times [2019-10-13 17:50:33,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:33,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926181748] [2019-10-13 17:50:33,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:33,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:33,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:33,365 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 17:50:33,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926181748] [2019-10-13 17:50:33,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665336287] [2019-10-13 17:50:33,366 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 17:50:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:33,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:50:33,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:33,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:50:33,515 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 17:50:33,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:33,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:50:33,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509163209] [2019-10-13 17:50:33,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:50:33,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:50:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:50:33,520 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 8 states. [2019-10-13 17:50:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:33,735 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-10-13 17:50:33,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:50:33,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-13 17:50:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:33,741 INFO L225 Difference]: With dead ends: 79 [2019-10-13 17:50:33,742 INFO L226 Difference]: Without dead ends: 57 [2019-10-13 17:50:33,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:50:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-13 17:50:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-10-13 17:50:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:50:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-10-13 17:50:33,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2019-10-13 17:50:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:33,763 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-10-13 17:50:33,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:50:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-10-13 17:50:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:50:33,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:33,765 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] [2019-10-13 17:50:33,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:33,966 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash -342662518, now seen corresponding path program 1 times [2019-10-13 17:50:33,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:33,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110918533] [2019-10-13 17:50:33,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:33,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:33,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:50:34,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110918533] [2019-10-13 17:50:34,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:34,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:50:34,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094970742] [2019-10-13 17:50:34,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:50:34,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:50:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:34,108 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 4 states. [2019-10-13 17:50:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:34,189 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-10-13 17:50:34,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:50:34,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 17:50:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:34,193 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:50:34,193 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:50:34,194 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 17:50:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:50:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-13 17:50:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:50:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-13 17:50:34,207 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2019-10-13 17:50:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:34,208 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-13 17:50:34,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:50:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-13 17:50:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:50:34,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:34,211 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] [2019-10-13 17:50:34,212 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:34,212 INFO L82 PathProgramCache]: Analyzing trace with hash 358402060, now seen corresponding path program 1 times [2019-10-13 17:50:34,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:34,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797489497] [2019-10-13 17:50:34,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:34,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:34,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:35,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797489497] [2019-10-13 17:50:35,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136885744] [2019-10-13 17:50:35,504 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 17:50:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:35,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:50:35,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:35,643 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 17:50:35,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:35,654 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:35,655 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 17:50:35,655 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-13 17:50:35,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:35,897 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$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 17:50:35,902 INFO L168 Benchmark]: Toolchain (without parser) took 5043.72 ms. Allocated memory was 137.9 MB in the beginning and 250.1 MB in the end (delta: 112.2 MB). Free memory was 102.7 MB in the beginning and 184.4 MB in the end (delta: -81.7 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,903 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.16 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 102.5 MB in the beginning and 178.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,905 INFO L168 Benchmark]: Boogie Preprocessor took 61.85 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 175.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,906 INFO L168 Benchmark]: RCFGBuilder took 414.54 ms. Allocated memory is still 199.8 MB. Free memory was 175.5 MB in the beginning and 157.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,911 INFO L168 Benchmark]: TraceAbstraction took 4206.84 ms. Allocated memory was 199.8 MB in the beginning and 250.1 MB in the end (delta: 50.3 MB). Free memory was 156.3 MB in the beginning and 184.4 MB in the end (delta: -28.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:35,915 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.16 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 102.5 MB in the beginning and 178.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.85 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 175.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.54 ms. Allocated memory is still 199.8 MB. Free memory was 175.5 MB in the beginning and 157.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4206.84 ms. Allocated memory was 199.8 MB in the beginning and 250.1 MB in the end (delta: 50.3 MB). Free memory was 156.3 MB in the beginning and 184.4 MB in the end (delta: -28.1 MB). Peak memory consumption was 22.3 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...