/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-examples/sanfoundry_24-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:44:12,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:12,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:12,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:44:12,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:44:12,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:44:12,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:44:12,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:44:12,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:44:12,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:44:12,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:44:12,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:44:12,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:44:12,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:44:12,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:44:12,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:44:12,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:44:12,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:44:12,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:44:12,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:44:12,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:44:12,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:44:12,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:44:12,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:44:12,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:44:12,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:12,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:12,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:12,648 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 19:44:12,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:12,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:12,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:12,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:12,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:12,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:12,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:12,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:12,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:12,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:12,661 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:12,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:12,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:12,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:12,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:12,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:12,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:12,662 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:12,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:12,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:12,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:12,985 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:12,986 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:12,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-08-22 19:44:13,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7663ee1dd/f664678d769b420f887d31b01ca3d363/FLAGbf0d247bd [2020-08-22 19:44:13,511 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:44:13,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-08-22 19:44:13,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7663ee1dd/f664678d769b420f887d31b01ca3d363/FLAGbf0d247bd [2020-08-22 19:44:13,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7663ee1dd/f664678d769b420f887d31b01ca3d363 [2020-08-22 19:44:13,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:44:13,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:44:13,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:13,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:44:13,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:44:13,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:13,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f34280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13, skipping insertion in model container [2020-08-22 19:44:13,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:13,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:44:13,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:44:14,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:14,144 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:44:14,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:14,192 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:44:14,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14 WrapperNode [2020-08-22 19:44:14,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:14,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:44:14,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:44:14,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:44:14,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (1/1) ... [2020-08-22 19:44:14,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:44:14,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:44:14,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:44:14,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:44:14,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (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 19:44:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:44:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:44:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:44:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure printEven [2020-08-22 19:44:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure printOdd [2020-08-22 19:44:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:44:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:44:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:44:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure printEven [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure printOdd [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:44:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:44:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:44:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:44:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:44:14,726 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:44:14,726 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:44:14,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:14 BoogieIcfgContainer [2020-08-22 19:44:14,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:44:14,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:44:14,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:44:14,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:44:14,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:44:13" (1/3) ... [2020-08-22 19:44:14,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5147f03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:14, skipping insertion in model container [2020-08-22 19:44:14,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:14" (2/3) ... [2020-08-22 19:44:14,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5147f03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:14, skipping insertion in model container [2020-08-22 19:44:14,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:14" (3/3) ... [2020-08-22 19:44:14,739 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2020-08-22 19:44:14,750 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:44:14,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:44:14,773 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:44:14,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:44:14,799 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:44:14,799 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:44:14,799 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:44:14,799 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:44:14,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:44:14,800 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:44:14,800 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:44:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-08-22 19:44:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:44:14,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:14,833 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] [2020-08-22 19:44:14,834 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1447674201, now seen corresponding path program 1 times [2020-08-22 19:44:14,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:14,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180702579] [2020-08-22 19:44:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:14,915 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,057 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 19:44:15,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180702579] [2020-08-22 19:44:15,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:15,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:44:15,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447233806] [2020-08-22 19:44:15,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:44:15,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:44:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:15,084 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-08-22 19:44:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:15,297 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-08-22 19:44:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:44:15,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 19:44:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:15,310 INFO L225 Difference]: With dead ends: 110 [2020-08-22 19:44:15,310 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 19:44:15,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 19:44:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-22 19:44:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 19:44:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-08-22 19:44:15,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2020-08-22 19:44:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:15,374 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-08-22 19:44:15,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:44:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-08-22 19:44:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:44:15,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:15,377 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] [2020-08-22 19:44:15,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:44:15,378 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1779758876, now seen corresponding path program 1 times [2020-08-22 19:44:15,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:15,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154460374] [2020-08-22 19:44:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:15,382 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,496 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 19:44:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154460374] [2020-08-22 19:44:15,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:15,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:44:15,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106537534] [2020-08-22 19:44:15,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:44:15,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:15,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:44:15,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:15,500 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2020-08-22 19:44:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:15,738 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-08-22 19:44:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:44:15,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-22 19:44:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:15,742 INFO L225 Difference]: With dead ends: 125 [2020-08-22 19:44:15,742 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:44:15,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:44:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-08-22 19:44:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 19:44:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-08-22 19:44:15,763 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 26 [2020-08-22 19:44:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:15,763 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-08-22 19:44:15,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:44:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-08-22 19:44:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:44:15,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:15,765 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 19:44:15,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:44:15,766 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1567937856, now seen corresponding path program 1 times [2020-08-22 19:44:15,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:15,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819118380] [2020-08-22 19:44:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:15,803 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,249 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 19:44:16,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819118380] [2020-08-22 19:44:16,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:16,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:44:16,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392798738] [2020-08-22 19:44:16,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:44:16,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:44:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:44:16,252 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 10 states. [2020-08-22 19:44:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:16,678 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-08-22 19:44:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:44:16,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-08-22 19:44:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:16,680 INFO L225 Difference]: With dead ends: 68 [2020-08-22 19:44:16,680 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 19:44:16,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:44:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 19:44:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 19:44:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 19:44:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-08-22 19:44:16,693 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 33 [2020-08-22 19:44:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:16,694 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-08-22 19:44:16,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:44:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-08-22 19:44:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 19:44:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:16,696 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] [2020-08-22 19:44:16,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:44:16,696 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash -741681537, now seen corresponding path program 1 times [2020-08-22 19:44:16,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:16,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117972280] [2020-08-22 19:44:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:16,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:44:16,705 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 19:44:16,711 INFO L168 Benchmark]: Toolchain (without parser) took 2798.20 ms. Allocated memory was 145.2 MB in the beginning and 234.9 MB in the end (delta: 89.7 MB). Free memory was 102.3 MB in the beginning and 126.4 MB in the end (delta: -24.1 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,712 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 145.2 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.80 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,714 INFO L168 Benchmark]: Boogie Preprocessor took 172.90 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,714 INFO L168 Benchmark]: RCFGBuilder took 364.48 ms. Allocated memory is still 203.4 MB. Free memory was 180.4 MB in the beginning and 161.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,715 INFO L168 Benchmark]: TraceAbstraction took 1975.83 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 161.0 MB in the beginning and 126.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:16,720 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 145.2 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.80 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 172.90 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.48 ms. Allocated memory is still 203.4 MB. Free memory was 180.4 MB in the beginning and 161.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1975.83 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 161.0 MB in the beginning and 126.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 66.1 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...