/usr/bin/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s5liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:45:02,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:45:02,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:45:02,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:45:02,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:45:02,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:45:02,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:45:02,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:45:02,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:45:02,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:45:02,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:45:02,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:45:02,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:45:02,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:45:02,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:45:02,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:45:02,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:45:02,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:45:02,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:45:02,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:45:02,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:45:02,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:45:02,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:45:02,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:45:02,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:45:02,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:45:02,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:45:02,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:45:02,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:45:02,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:45:02,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:45:02,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:45:02,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:45:02,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:45:02,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:45:02,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:45:02,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:45:02,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:45:02,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:45:02,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:45:02,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:45:02,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:45:02,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:45:02,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:45:02,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:45:02,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:45:02,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:45:02,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:45:02,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:45:02,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:45:02,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:45:02,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:45:02,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:45:02,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:45:02,979 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:45:02,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:45:02,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:45:02,980 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:45:02,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:45:02,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:45:02,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:02,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:45:02,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:45:02,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:45:02,981 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:45:03,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:45:03,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:45:03,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:45:03,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:45:03,323 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:45:03,324 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s5liff.c [2020-08-22 19:45:03,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb84afe9/e53dbb3510b74e918ce752bde28ac5a3/FLAG22ce2089f [2020-08-22 19:45:03,836 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:03,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s5liff.c [2020-08-22 19:45:03,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb84afe9/e53dbb3510b74e918ce752bde28ac5a3/FLAG22ce2089f [2020-08-22 19:45:04,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb84afe9/e53dbb3510b74e918ce752bde28ac5a3 [2020-08-22 19:45:04,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:04,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:04,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:04,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:04,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:04,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246ea8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04, skipping insertion in model container [2020-08-22 19:45:04,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:04,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:04,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:04,534 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:04,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:04,573 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:04,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04 WrapperNode [2020-08-22 19:45:04,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:04,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:04,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:04,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:04,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (1/1) ... [2020-08-22 19:45:04,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:04,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:04,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:04,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:04,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (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 [2020-08-22 19:45:04,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:45:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:45:04,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:04,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:45:04,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:45:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:04,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:05,039 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:05,040 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:45:05,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:05 BoogieIcfgContainer [2020-08-22 19:45:05,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:05,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:05,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:05,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:05,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:04" (1/3) ... [2020-08-22 19:45:05,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647f8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:05, skipping insertion in model container [2020-08-22 19:45:05,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:04" (2/3) ... [2020-08-22 19:45:05,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647f8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:05, skipping insertion in model container [2020-08-22 19:45:05,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:05" (3/3) ... [2020-08-22 19:45:05,077 INFO L109 eAbstractionObserver]: Analyzing ICFG s5liff.c [2020-08-22 19:45:05,103 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:05,121 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:05,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:05,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:05,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:05,171 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:05,171 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:05,171 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:05,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:05,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:05,172 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-08-22 19:45:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:45:05,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:05,198 INFO L422 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] [2020-08-22 19:45:05,199 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-08-22 19:45:05,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:05,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957548332] [2020-08-22 19:45:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:05,275 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:05,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 19:45:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:05,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957548332] [2020-08-22 19:45:05,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:05,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:45:05,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165097526] [2020-08-22 19:45:05,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:45:05,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:45:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:05,539 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-08-22 19:45:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:05,800 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-08-22 19:45:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:45:05,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 19:45:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:05,817 INFO L225 Difference]: With dead ends: 125 [2020-08-22 19:45:05,817 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:45:05,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:45:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-22 19:45:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:45:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 19:45:05,889 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-08-22 19:45:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:05,890 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 19:45:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:45:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 19:45:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:45:05,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:05,893 INFO L422 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] [2020-08-22 19:45:05,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:05,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:05,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-08-22 19:45:05,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:05,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205737283] [2020-08-22 19:45:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:05,897 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:05,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:06,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 19:45:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:06,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205737283] [2020-08-22 19:45:06,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:06,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:45:06,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377445] [2020-08-22 19:45:06,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:45:06,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:45:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:06,014 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-08-22 19:45:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:06,280 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-08-22 19:45:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:45:06,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 19:45:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:06,283 INFO L225 Difference]: With dead ends: 115 [2020-08-22 19:45:06,283 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:45:06,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:45:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:45:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-08-22 19:45:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 19:45:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-08-22 19:45:06,301 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-08-22 19:45:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:06,302 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-08-22 19:45:06,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:45:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-08-22 19:45:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 19:45:06,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:06,304 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:06,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:06,305 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-08-22 19:45:06,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:06,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15230759] [2020-08-22 19:45:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:06,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:45:06,329 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:45:06,336 INFO L168 Benchmark]: Toolchain (without parser) took 2092.11 ms. Allocated memory was 138.4 MB in the beginning and 232.3 MB in the end (delta: 93.8 MB). Free memory was 102.7 MB in the beginning and 197.5 MB in the end (delta: -94.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:45:06,338 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:45:06,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.09 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 91.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:06,340 INFO L168 Benchmark]: Boogie Preprocessor took 125.00 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 177.0 MB in the end (delta: -85.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:06,341 INFO L168 Benchmark]: RCFGBuilder took 354.01 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 156.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:06,342 INFO L168 Benchmark]: TraceAbstraction took 1275.77 ms. Allocated memory was 199.8 MB in the beginning and 232.3 MB in the end (delta: 32.5 MB). Free memory was 155.6 MB in the beginning and 197.5 MB in the end (delta: -42.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:45:06,346 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.09 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 91.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.00 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 177.0 MB in the end (delta: -85.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.01 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 156.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1275.77 ms. Allocated memory was 199.8 MB in the beginning and 232.3 MB in the end (delta: 32.5 MB). Free memory was 155.6 MB in the beginning and 197.5 MB in the end (delta: -42.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...