/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/ms2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:58:02,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:58:02,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:58:02,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:58:02,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:58:02,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:58:02,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:58:02,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:58:02,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:58:02,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:58:02,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:58:02,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:58:02,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:58:02,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:58:02,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:58:02,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:58:02,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:58:02,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:58:02,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:58:02,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:58:02,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:58:02,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:58:02,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:58:02,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:58:02,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:58:02,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:58:02,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:58:02,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:58:02,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:58:02,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-07 13:58:02,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:58:02,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:58:02,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:58:02,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:58:02,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:58:02,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:58:02,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:58:02,910 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:58:02,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:58:02,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:58:02,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:58:02,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:58:02,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:58:02,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:58:02,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:58:02,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:58:02,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:58:02,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:58:02,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:58:02,913 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:58:02,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:58:02,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:58:02,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:02,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:58:02,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:58:02,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:58:02,914 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:58:03,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:58:03,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:58:03,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:58:03,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:58:03,225 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:58:03,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-07 13:58:03,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac778e4ce/5e7faa6114584db8abd47c7402ca9d9e/FLAGad6b8213e [2020-07-07 13:58:03,759 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:58:03,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-07 13:58:03,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac778e4ce/5e7faa6114584db8abd47c7402ca9d9e/FLAGad6b8213e [2020-07-07 13:58:04,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac778e4ce/5e7faa6114584db8abd47c7402ca9d9e [2020-07-07 13:58:04,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:58:04,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:58:04,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:04,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:58:04,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:58:04,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe97047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04, skipping insertion in model container [2020-07-07 13:58:04,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:58:04,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:58:04,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:04,343 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:58:04,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:04,381 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:58:04,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04 WrapperNode [2020-07-07 13:58:04,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:04,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:58:04,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:58:04,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:58:04,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (1/1) ... [2020-07-07 13:58:04,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:58:04,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:58:04,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:58:04,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:58:04,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (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 [2020-07-07 13:58:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:58:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:58:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 13:58:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:58:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:58:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:58:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 13:58:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 13:58:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:58:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:58:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:58:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:58:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:58:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:58:04,898 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:58:04,898 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:58:04,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:04 BoogieIcfgContainer [2020-07-07 13:58:04,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:58:04,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:58:04,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:58:04,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:58:04,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:58:04" (1/3) ... [2020-07-07 13:58:04,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c9e2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:04, skipping insertion in model container [2020-07-07 13:58:04,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:04" (2/3) ... [2020-07-07 13:58:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c9e2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:04, skipping insertion in model container [2020-07-07 13:58:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:04" (3/3) ... [2020-07-07 13:58:04,912 INFO L109 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-07-07 13:58:04,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:58:04,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:58:04,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:58:04,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:58:04,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:58:04,968 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:58:04,968 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:58:04,968 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:58:04,969 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:58:04,969 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:58:04,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:58:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-07-07 13:58:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 13:58:04,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:05,000 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] [2020-07-07 13:58:05,001 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash -845632023, now seen corresponding path program 1 times [2020-07-07 13:58:05,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:05,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760151442] [2020-07-07 13:58:05,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:05,304 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:05,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760151442] [2020-07-07 13:58:05,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:05,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:58:05,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661426282] [2020-07-07 13:58:05,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:58:05,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:05,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:58:05,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:58:05,328 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-07-07 13:58:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:05,496 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-07-07 13:58:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:58:05,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-07 13:58:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:05,508 INFO L225 Difference]: With dead ends: 97 [2020-07-07 13:58:05,508 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 13:58:05,513 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 [2020-07-07 13:58:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 13:58:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 13:58:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 13:58:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-07 13:58:05,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 30 [2020-07-07 13:58:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:05,564 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-07 13:58:05,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:58:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-07 13:58:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 13:58:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:05,567 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] [2020-07-07 13:58:05,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:58:05,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 104990277, now seen corresponding path program 1 times [2020-07-07 13:58:05,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:05,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497389973] [2020-07-07 13:58:05,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:05,717 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:05,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497389973] [2020-07-07 13:58:05,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:05,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:05,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720637527] [2020-07-07 13:58:05,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:05,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:05,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:05,722 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 5 states. [2020-07-07 13:58:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:05,943 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-07-07 13:58:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:58:05,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-07 13:58:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:05,945 INFO L225 Difference]: With dead ends: 71 [2020-07-07 13:58:05,946 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 13:58:05,947 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 [2020-07-07 13:58:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 13:58:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-07 13:58:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 13:58:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-07 13:58:05,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 30 [2020-07-07 13:58:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:05,962 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-07 13:58:05,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-07 13:58:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:58:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:05,964 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] [2020-07-07 13:58:05,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:58:05,965 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1687643347, now seen corresponding path program 1 times [2020-07-07 13:58:05,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:05,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951809848] [2020-07-07 13:58:05,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:05,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:58:05,992 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:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:58:05,997 INFO L168 Benchmark]: Toolchain (without parser) took 1871.42 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.1 MB in the beginning and 97.6 MB in the end (delta: 4.5 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:05,999 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:58:06,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.31 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 91.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:06,001 INFO L168 Benchmark]: Boogie Preprocessor took 137.69 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:06,002 INFO L168 Benchmark]: RCFGBuilder took 383.20 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:06,003 INFO L168 Benchmark]: TraceAbstraction took 1090.20 ms. Allocated memory is still 202.4 MB. Free memory was 161.4 MB in the beginning and 97.6 MB in the end (delta: 63.8 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:06,007 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.31 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 91.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.69 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.20 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1090.20 ms. Allocated memory is still 202.4 MB. Free memory was 161.4 MB in the beginning and 97.6 MB in the end (delta: 63.8 MB). Peak memory consumption was 63.8 MB. 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:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...