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/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:50:38,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:50:38,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:50:38,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:50:38,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:50:38,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:50:38,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:50:38,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:50:38,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:50:38,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:50:38,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:50:38,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:50:38,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:50:38,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:50:38,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:50:38,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:50:38,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:50:38,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:50:38,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:50:38,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:50:38,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:50:38,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:50:38,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:50:38,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:50:38,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:50:38,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:50:38,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:50:38,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:50:38,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:50:38,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:50:38,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:50:38,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:50:38,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:50:38,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:50:38,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:50:38,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:50:38,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:50:38,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:50:38,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:50:38,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:50:38,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:50:38,097 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 17:50:38,124 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:50:38,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:50:38,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:50:38,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:50:38,125 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:50:38,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:50:38,126 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:50:38,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:50:38,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:50:38,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:50:38,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:50:38,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:50:38,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:50:38,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:50:38,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:50:38,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:50:38,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:38,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:50:38,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:50:38,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:50:38,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:50:38,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:50:38,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:50:38,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:50:38,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:50:38,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:50:38,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:50:38,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:50:38,423 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:50:38,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2019-10-13 17:50:38,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913f1c9d9/f5b1d00cd374458289bb807d1a4dcaa4/FLAGd1e5323ff [2019-10-13 17:50:38,949 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:50:38,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c [2019-10-13 17:50:38,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913f1c9d9/f5b1d00cd374458289bb807d1a4dcaa4/FLAGd1e5323ff [2019-10-13 17:50:39,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913f1c9d9/f5b1d00cd374458289bb807d1a4dcaa4 [2019-10-13 17:50:39,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:50:39,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:50:39,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:39,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:50:39,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:50:39,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39, skipping insertion in model container [2019-10-13 17:50:39,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,357 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:50:39,378 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:50:39,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:39,584 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:50:39,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:39,749 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:50:39,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39 WrapperNode [2019-10-13 17:50:39,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:39,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:50:39,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:50:39,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:50:39,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (1/1) ... [2019-10-13 17:50:39,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:50:39,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:50:39,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:50:39,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:50:39,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (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 17:50:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:50:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:50:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:50:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:50:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:50:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:50:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:50:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:50:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:50:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:50:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:50:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:50:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:50:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:50:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:50:40,306 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:50:40,307 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 17:50:40,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:40 BoogieIcfgContainer [2019-10-13 17:50:40,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:50:40,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:50:40,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:50:40,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:50:40,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:50:39" (1/3) ... [2019-10-13 17:50:40,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370fba2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:40, skipping insertion in model container [2019-10-13 17:50:40,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:39" (2/3) ... [2019-10-13 17:50:40,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370fba2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:40, skipping insertion in model container [2019-10-13 17:50:40,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:40" (3/3) ... [2019-10-13 17:50:40,316 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2019-10-13 17:50:40,323 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:50:40,329 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:50:40,339 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:50:40,363 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:50:40,363 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:50:40,363 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:50:40,363 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:50:40,363 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:50:40,363 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:50:40,364 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:50:40,364 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:50:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-10-13 17:50:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:50:40,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:40,389 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 17:50:40,391 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064678, now seen corresponding path program 1 times [2019-10-13 17:50:40,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:40,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95632688] [2019-10-13 17:50:40,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:40,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:40,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:40,609 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 17:50:40,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95632688] [2019-10-13 17:50:40,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:40,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:40,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619984075] [2019-10-13 17:50:40,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:40,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:40,634 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2019-10-13 17:50:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:40,824 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2019-10-13 17:50:40,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:40,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-13 17:50:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:40,836 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:50:40,837 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:50:40,842 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 17:50:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:50:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 17:50:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:50:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-10-13 17:50:40,900 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 24 [2019-10-13 17:50:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:40,901 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-10-13 17:50:40,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-10-13 17:50:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:50:40,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:40,905 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 17:50:40,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash 625586285, now seen corresponding path program 1 times [2019-10-13 17:50:40,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:40,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-13 17:50:40,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:40,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:40,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:41,084 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 17:50:41,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-13 17:50:41,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:41,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:50:41,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653165642] [2019-10-13 17:50:41,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:50:41,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:50:41,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:50:41,092 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 6 states. [2019-10-13 17:50:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:41,314 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-10-13 17:50:41,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:50:41,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-13 17:50:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:41,317 INFO L225 Difference]: With dead ends: 52 [2019-10-13 17:50:41,317 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:50:41,318 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 17:50:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:50:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-13 17:50:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:50:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2019-10-13 17:50:41,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 24 [2019-10-13 17:50:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:41,338 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2019-10-13 17:50:41,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:50:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2019-10-13 17:50:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:50:41,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:41,341 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 17:50:41,342 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash 627433327, now seen corresponding path program 1 times [2019-10-13 17:50:41,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:41,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494561133] [2019-10-13 17:50:41,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:41,612 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 17:50:41,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494561133] [2019-10-13 17:50:41,613 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:41,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:50:41,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263422649] [2019-10-13 17:50:41,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:50:41,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:50:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:50:41,617 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 5 states. [2019-10-13 17:50:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:41,822 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2019-10-13 17:50:41,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:50:41,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 17:50:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:41,827 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:50:41,827 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:50:41,828 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 17:50:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:50:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-10-13 17:50:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 17:50:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-10-13 17:50:41,843 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 24 [2019-10-13 17:50:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:41,845 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-10-13 17:50:41,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:50:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-10-13 17:50:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:50:41,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:41,847 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] [2019-10-13 17:50:41,847 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 506953876, now seen corresponding path program 1 times [2019-10-13 17:50:41,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:41,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032975783] [2019-10-13 17:50:41,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,013 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 17:50:42,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032975783] [2019-10-13 17:50:42,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051381861] [2019-10-13 17:50:42,014 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 17:50:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:50:42,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:42,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:50:42,145 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 17:50:42,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:42,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-10-13 17:50:42,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342009735] [2019-10-13 17:50:42,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:50:42,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:50:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:50:42,148 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 9 states. [2019-10-13 17:50:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:42,453 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2019-10-13 17:50:42,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:50:42,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-10-13 17:50:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:42,456 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:50:42,457 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:50:42,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 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 17:50:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:50:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2019-10-13 17:50:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 17:50:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-13 17:50:42,471 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2019-10-13 17:50:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:42,472 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-13 17:50:42,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:50:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-13 17:50:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:50:42,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:42,474 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, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:42,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:42,677 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash -81151448, now seen corresponding path program 1 times [2019-10-13 17:50:42,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:42,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888649577] [2019-10-13 17:50:42,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:50:42,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888649577] [2019-10-13 17:50:42,792 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:42,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:50:42,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035218583] [2019-10-13 17:50:42,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:50:42,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:50:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:42,794 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 4 states. [2019-10-13 17:50:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:42,913 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2019-10-13 17:50:42,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:50:42,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-10-13 17:50:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:42,915 INFO L225 Difference]: With dead ends: 75 [2019-10-13 17:50:42,915 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:50:42,916 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 17:50:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:50:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-13 17:50:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 17:50:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-10-13 17:50:42,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 44 [2019-10-13 17:50:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:42,924 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-10-13 17:50:42,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:50:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-10-13 17:50:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:50:42,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:42,925 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, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:42,926 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash 619913130, now seen corresponding path program 1 times [2019-10-13 17:50:42,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:42,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887772673] [2019-10-13 17:50:42,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:43,995 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2019-10-13 17:50:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:44,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887772673] [2019-10-13 17:50:44,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15895104] [2019-10-13 17:50:44,754 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 17:50:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:44,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:50:44,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:44,926 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 17:50:44,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:44,937 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:44,938 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 17:50:44,938 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-13 17:50:45,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:45,183 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 17:50:45,189 INFO L168 Benchmark]: Toolchain (without parser) took 5849.37 ms. Allocated memory was 146.3 MB in the beginning and 272.1 MB in the end (delta: 125.8 MB). Free memory was 103.4 MB in the beginning and 201.6 MB in the end (delta: -98.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,195 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.60 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.2 MB in the beginning and 181.0 MB in the end (delta: -77.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,197 INFO L168 Benchmark]: Boogie Preprocessor took 51.29 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 178.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,201 INFO L168 Benchmark]: RCFGBuilder took 506.65 ms. Allocated memory is still 203.9 MB. Free memory was 178.4 MB in the beginning and 153.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,202 INFO L168 Benchmark]: TraceAbstraction took 4877.70 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 153.9 MB in the beginning and 201.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-10-13 17:50:45,209 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 408.60 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.2 MB in the beginning and 181.0 MB in the end (delta: -77.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.29 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 178.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.65 ms. Allocated memory is still 203.9 MB. Free memory was 178.4 MB in the beginning and 153.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4877.70 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 153.9 MB in the beginning and 201.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 20.5 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...