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 0.1.24-13a467a-m [2019-10-14 21:49:28,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:28,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:29,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:29,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:29,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:29,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:29,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:29,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:29,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:29,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:29,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:29,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:29,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:29,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:29,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:29,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:29,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:29,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:29,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:29,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:29,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:29,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:29,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:29,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:49:29,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:29,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:29,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:29,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:29,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:29,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:29,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:29,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:29,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:29,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:29,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:29,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:49:29,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:29,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:29,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:29,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:29,089 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:29,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:29,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:29,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:29,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:29,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:29,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:29,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:29,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:29,091 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:29,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:29,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:29,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:29,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:29,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:29,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:29,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:29,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:29,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:29,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:29,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:29,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:29,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:29,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:29,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:29,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:29,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:29,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:29,389 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:29,390 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:29,390 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2019-10-14 21:49:29,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dee3e52/e5bad3de4d424323be3a7380d0a16e3f/FLAG8cb250ae4 [2019-10-14 21:49:29,920 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:29,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2019-10-14 21:49:29,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dee3e52/e5bad3de4d424323be3a7380d0a16e3f/FLAG8cb250ae4 [2019-10-14 21:49:30,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dee3e52/e5bad3de4d424323be3a7380d0a16e3f [2019-10-14 21:49:30,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:30,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:30,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:30,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:30,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:30,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b67f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30, skipping insertion in model container [2019-10-14 21:49:30,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,283 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:30,305 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:30,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:30,505 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:30,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:30,649 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:30,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30 WrapperNode [2019-10-14 21:49:30,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:30,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:30,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:30,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:30,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... [2019-10-14 21:49:30,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:30,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:30,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:30,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:30,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:30,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:30,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:30,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:31,148 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:31,148 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:49:31,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:31 BoogieIcfgContainer [2019-10-14 21:49:31,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:31,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:31,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:31,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:31,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:30" (1/3) ... [2019-10-14 21:49:31,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368cab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:31, skipping insertion in model container [2019-10-14 21:49:31,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:30" (2/3) ... [2019-10-14 21:49:31,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368cab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:31, skipping insertion in model container [2019-10-14 21:49:31,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:31" (3/3) ... [2019-10-14 21:49:31,160 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2019-10-14 21:49:31,171 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:31,178 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:31,190 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:31,215 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:31,215 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:31,215 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:31,215 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:31,216 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:31,216 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:31,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:31,216 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-14 21:49:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:49:31,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:31,242 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] [2019-10-14 21:49:31,244 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1164915713, now seen corresponding path program 1 times [2019-10-14 21:49:31,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:31,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350287841] [2019-10-14 21:49:31,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:31,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350287841] [2019-10-14 21:49:31,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:31,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:31,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104109264] [2019-10-14 21:49:31,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:31,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:31,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:31,493 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2019-10-14 21:49:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:31,647 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2019-10-14 21:49:31,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:31,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 21:49:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:31,659 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:49:31,659 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:49:31,663 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 [2019-10-14 21:49:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:49:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:49:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:49:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-14 21:49:31,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2019-10-14 21:49:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:31,706 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-14 21:49:31,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-14 21:49:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:49:31,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:31,708 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] [2019-10-14 21:49:31,709 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 208061977, now seen corresponding path program 1 times [2019-10-14 21:49:31,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:31,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187229107] [2019-10-14 21:49:31,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:31,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187229107] [2019-10-14 21:49:31,896 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:31,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:49:31,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109302696] [2019-10-14 21:49:31,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:49:31,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:31,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:49:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:31,903 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2019-10-14 21:49:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,115 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-10-14 21:49:32,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:49:32,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:49:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,117 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:49:32,118 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:49:32,119 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 [2019-10-14 21:49:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:49:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 21:49:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:49:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-10-14 21:49:32,130 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2019-10-14 21:49:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,131 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-10-14 21:49:32,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:49:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-10-14 21:49:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:49:32,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,133 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] [2019-10-14 21:49:32,133 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash 209909019, now seen corresponding path program 1 times [2019-10-14 21:49:32,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:32,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140860547] [2019-10-14 21:49:32,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:32,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140860547] [2019-10-14 21:49:32,517 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:32,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:49:32,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979251859] [2019-10-14 21:49:32,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:49:32,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:49:32,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:32,519 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2019-10-14 21:49:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,759 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-10-14 21:49:32,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:32,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 21:49:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,766 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:49:32,766 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:49:32,767 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 [2019-10-14 21:49:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:49:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-14 21:49:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:49:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-14 21:49:32,785 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2019-10-14 21:49:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,787 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-14 21:49:32,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:49:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-14 21:49:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:49:32,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,790 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] [2019-10-14 21:49:32,790 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2624448, now seen corresponding path program 1 times [2019-10-14 21:49:32,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:32,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179807434] [2019-10-14 21:49:32,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:32,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179807434] [2019-10-14 21:49:32,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670959665] [2019-10-14 21:49:32,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:33,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:49:33,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:33,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:33,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:33,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:49:33,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553781916] [2019-10-14 21:49:33,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:33,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:33,094 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 8 states. [2019-10-14 21:49:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:33,326 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-10-14 21:49:33,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:49:33,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:49:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:33,331 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:49:33,333 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:49:33,334 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 [2019-10-14 21:49:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:49:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-10-14 21:49:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:49:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-10-14 21:49:33,369 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2019-10-14 21:49:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:33,369 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-10-14 21:49:33,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-10-14 21:49:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:49:33,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:33,374 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] [2019-10-14 21:49:33,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:33,579 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -342662518, now seen corresponding path program 1 times [2019-10-14 21:49:33,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:33,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000056072] [2019-10-14 21:49:33,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:49:33,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000056072] [2019-10-14 21:49:33,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:33,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:33,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471967953] [2019-10-14 21:49:33,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:33,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:33,690 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 4 states. [2019-10-14 21:49:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:33,779 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-10-14 21:49:33,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:33,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 21:49:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:33,781 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:49:33,781 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:49:33,781 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 [2019-10-14 21:49:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:49:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 21:49:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:49:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-14 21:49:33,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2019-10-14 21:49:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:33,791 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-14 21:49:33,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-14 21:49:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:49:33,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:33,794 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] [2019-10-14 21:49:33,795 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash 358402060, now seen corresponding path program 1 times [2019-10-14 21:49:33,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:33,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731981643] [2019-10-14 21:49:33,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:35,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731981643] [2019-10-14 21:49:35,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073713078] [2019-10-14 21:49:35,126 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 [2019-10-14 21:49:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:35,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:49:35,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:35,279 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 [2019-10-14 21:49:35,280 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:35,290 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:35,291 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:35,292 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-14 21:49:35,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:35,533 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 [2019-10-14 21:49:35,539 INFO L168 Benchmark]: Toolchain (without parser) took 5269.19 ms. Allocated memory was 146.3 MB in the beginning and 244.3 MB in the end (delta: 98.0 MB). Free memory was 103.4 MB in the beginning and 157.0 MB in the end (delta: -53.6 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,540 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.50 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.2 MB in the beginning and 182.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,542 INFO L168 Benchmark]: Boogie Preprocessor took 45.51 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,543 INFO L168 Benchmark]: RCFGBuilder took 453.88 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 160.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,544 INFO L168 Benchmark]: TraceAbstraction took 4385.31 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 160.3 MB in the beginning and 157.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2019-10-14 21:49:35,552 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.50 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.2 MB in the beginning and 182.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.51 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.88 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 160.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4385.31 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 160.3 MB in the beginning and 157.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 44.1 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...