/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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:44:59,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:59,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:59,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:44:59,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:44:59,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:44:59,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:44:59,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:44:59,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:44:59,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:44:59,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:44:59,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:44:59,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:44:59,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:44:59,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:44:59,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:44:59,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:44:59,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:44:59,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:44:59,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:44:59,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:44:59,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:44:59,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:44:59,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:44:59,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:44:59,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:59,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:59,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:59,453 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 19:44:59,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:59,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:59,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:59,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:59,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:59,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:59,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:59,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:59,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:59,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:59,466 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:59,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:59,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:59,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:59,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:59,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:59,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:59,467 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:59,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:59,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:59,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:59,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:59,782 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:59,783 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-08-22 19:44:59,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ff1884d/db9e6fd634b2462ea309ee2e7b413595/FLAGa0f7f3db2 [2020-08-22 19:45:00,293 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:00,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-08-22 19:45:00,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ff1884d/db9e6fd634b2462ea309ee2e7b413595/FLAGa0f7f3db2 [2020-08-22 19:45:00,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ff1884d/db9e6fd634b2462ea309ee2e7b413595 [2020-08-22 19:45:00,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:00,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:00,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:00,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:00,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:00,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:00,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72808bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00, skipping insertion in model container [2020-08-22 19:45:00,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:00,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:00,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:00,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:00,947 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:00,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:00,984 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:00,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00 WrapperNode [2020-08-22 19:45:00,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:00,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:00,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:00,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:01,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (1/1) ... [2020-08-22 19:45:01,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:01,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:01,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:01,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:01,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (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 19:45:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:45:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:45:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:45:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:45:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:45:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:45:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:45:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:01,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:01,481 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:45:01,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:01 BoogieIcfgContainer [2020-08-22 19:45:01,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:01,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:01,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:01,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:01,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:00" (1/3) ... [2020-08-22 19:45:01,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20825d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:01, skipping insertion in model container [2020-08-22 19:45:01,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:00" (2/3) ... [2020-08-22 19:45:01,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20825d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:01, skipping insertion in model container [2020-08-22 19:45:01,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:01" (3/3) ... [2020-08-22 19:45:01,493 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-08-22 19:45:01,503 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:01,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:01,537 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:01,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:01,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:01,560 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:01,561 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:01,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:01,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:01,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:01,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-08-22 19:45:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:45:01,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:01,590 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] [2020-08-22 19:45:01,590 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:01,595 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-08-22 19:45:01,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:01,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358505088] [2020-08-22 19:45:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:01,653 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:01,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 19:45:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:01,814 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 19:45:01,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358505088] [2020-08-22 19:45:01,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:01,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:45:01,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92866290] [2020-08-22 19:45:01,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:45:01,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:45:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:01,841 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-08-22 19:45:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:02,022 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-08-22 19:45:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:45:02,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 19:45:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:02,033 INFO L225 Difference]: With dead ends: 113 [2020-08-22 19:45:02,034 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 19:45:02,038 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 19:45:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 19:45:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 19:45:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 19:45:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-08-22 19:45:02,087 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-08-22 19:45:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:02,088 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-08-22 19:45:02,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:45:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-08-22 19:45:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:45:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:02,090 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] [2020-08-22 19:45:02,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:02,091 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-08-22 19:45:02,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:02,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821453883] [2020-08-22 19:45:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:02,095 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:02,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 19:45:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:02,213 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 19:45:02,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821453883] [2020-08-22 19:45:02,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:02,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:45:02,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561659421] [2020-08-22 19:45:02,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:45:02,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:45:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:02,216 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-08-22 19:45:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:02,398 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-08-22 19:45:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:45:02,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-22 19:45:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:02,400 INFO L225 Difference]: With dead ends: 99 [2020-08-22 19:45:02,401 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 19:45:02,402 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 19:45:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 19:45:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-08-22 19:45:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 19:45:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-08-22 19:45:02,419 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-08-22 19:45:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:02,419 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-08-22 19:45:02,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:45:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-08-22 19:45:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 19:45:02,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:02,422 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] [2020-08-22 19:45:02,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:02,422 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-08-22 19:45:02,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:02,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324951896] [2020-08-22 19:45:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:02,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:45:02,469 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 19:45:02,475 INFO L168 Benchmark]: Toolchain (without parser) took 1739.96 ms. Allocated memory was 139.5 MB in the beginning and 235.9 MB in the end (delta: 96.5 MB). Free memory was 102.8 MB in the beginning and 205.7 MB in the end (delta: -102.9 MB). Peak memory consumption was 83.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,476 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.83 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,478 INFO L168 Benchmark]: Boogie Preprocessor took 125.07 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.2 MB in the beginning and 179.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,479 INFO L168 Benchmark]: RCFGBuilder took 375.10 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 160.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,480 INFO L168 Benchmark]: TraceAbstraction took 985.35 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 159.4 MB in the beginning and 205.7 MB in the end (delta: -46.3 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:02,484 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.83 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.07 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.2 MB in the beginning and 179.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.10 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 160.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 985.35 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 159.4 MB in the beginning and 205.7 MB in the end (delta: -46.3 MB). Peak memory consumption was 76.7 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:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...