/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 0.1.25-86f66a4 [2020-07-07 13:57:34,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:57:34,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:57:34,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:57:34,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:57:34,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:57:34,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:57:34,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:57:34,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:57:34,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:57:34,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:57:34,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:57:34,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:57:34,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:57:34,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:57:34,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:57:34,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:57:34,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:57:34,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:57:34,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:57:34,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:57:34,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:57:34,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:57:34,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:57:34,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:57:34,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:57:34,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:57:34,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:57:34,407 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 13:57:34,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:57:34,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:57:34,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:57:34,425 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:57:34,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:57:34,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:57:34,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:57:34,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:57:34,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:57:34,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:57:34,431 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:57:34,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:57:34,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:57:34,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:57:34,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:57:34,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:57:34,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:57:34,432 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:57:34,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:57:34,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:57:34,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:57:34,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:57:34,697 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:57:34,698 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-07-07 13:57:34,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21476ce29/75c4c743f914460085bbb66a7664f00d/FLAGd1a91c375 [2020-07-07 13:57:35,303 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:57:35,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-07-07 13:57:35,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21476ce29/75c4c743f914460085bbb66a7664f00d/FLAGd1a91c375 [2020-07-07 13:57:35,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21476ce29/75c4c743f914460085bbb66a7664f00d [2020-07-07 13:57:35,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:57:35,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:57:35,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:57:35,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:57:35,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:57:35,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c02ec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35, skipping insertion in model container [2020-07-07 13:57:35,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:57:35,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:57:35,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:57:35,965 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:57:36,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:57:36,028 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:57:36,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36 WrapperNode [2020-07-07 13:57:36,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:57:36,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:57:36,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:57:36,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:57:36,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (1/1) ... [2020-07-07 13:57:36,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:57:36,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:57:36,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:57:36,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:57:36,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (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 13:57:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:57:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:57:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:57:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure printEven [2020-07-07 13:57:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure printOdd [2020-07-07 13:57:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:57:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:57:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:57:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:57:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure printEven [2020-07-07 13:57:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure printOdd [2020-07-07 13:57:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:57:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:57:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:57:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:57:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:57:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:57:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:57:36,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:57:36,533 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 13:57:36,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:57:36 BoogieIcfgContainer [2020-07-07 13:57:36,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:57:36,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:57:36,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:57:36,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:57:36,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:57:35" (1/3) ... [2020-07-07 13:57:36,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d324b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:57:36, skipping insertion in model container [2020-07-07 13:57:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:36" (2/3) ... [2020-07-07 13:57:36,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d324b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:57:36, skipping insertion in model container [2020-07-07 13:57:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:57:36" (3/3) ... [2020-07-07 13:57:36,548 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2020-07-07 13:57:36,561 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:57:36,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:57:36,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:57:36,615 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:57:36,615 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:57:36,615 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:57:36,615 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:57:36,616 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:57:36,616 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:57:36,616 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:57:36,616 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:57:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-07 13:57:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:57:36,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:36,661 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] [2020-07-07 13:57:36,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1447674201, now seen corresponding path program 1 times [2020-07-07 13:57:36,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:36,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25109484] [2020-07-07 13:57:36,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,900 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 13:57:36,900 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:36,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25109484] [2020-07-07 13:57:36,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:36,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:57:36,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665226430] [2020-07-07 13:57:36,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:57:36,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:36,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:57:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:57:36,927 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-07 13:57:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:37,167 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-07-07 13:57:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:57:37,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-07 13:57:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:37,181 INFO L225 Difference]: With dead ends: 110 [2020-07-07 13:57:37,181 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 13:57:37,186 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 [2020-07-07 13:57:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 13:57:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-07 13:57:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-07 13:57:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-07-07 13:57:37,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2020-07-07 13:57:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:37,244 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-07-07 13:57:37,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:57:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-07-07 13:57:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:57:37,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:37,246 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] [2020-07-07 13:57:37,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:57:37,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:37,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1779758876, now seen corresponding path program 1 times [2020-07-07 13:57:37,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:37,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957872429] [2020-07-07 13:57:37,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,383 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 13:57:37,383 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:37,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957872429] [2020-07-07 13:57:37,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:37,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:57:37,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141982843] [2020-07-07 13:57:37,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:57:37,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:57:37,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:57:37,387 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2020-07-07 13:57:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:37,646 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-07-07 13:57:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:57:37,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-07-07 13:57:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:37,649 INFO L225 Difference]: With dead ends: 125 [2020-07-07 13:57:37,650 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 13:57:37,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:57:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 13:57:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-07-07 13:57:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 13:57:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-07-07 13:57:37,691 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 26 [2020-07-07 13:57:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:37,691 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-07-07 13:57:37,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:57:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-07-07 13:57:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:57:37,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:37,693 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] [2020-07-07 13:57:37,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:57:37,694 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1567937856, now seen corresponding path program 1 times [2020-07-07 13:57:37,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:37,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713998858] [2020-07-07 13:57:37,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,088 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 13:57:38,089 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:38,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713998858] [2020-07-07 13:57:38,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:38,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:57:38,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103335039] [2020-07-07 13:57:38,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:57:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:57:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:57:38,091 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 10 states. [2020-07-07 13:57:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:38,454 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-07-07 13:57:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:57:38,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-07-07 13:57:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:38,456 INFO L225 Difference]: With dead ends: 68 [2020-07-07 13:57:38,456 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 13:57:38,457 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 [2020-07-07 13:57:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 13:57:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-07 13:57:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 13:57:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-07-07 13:57:38,470 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 33 [2020-07-07 13:57:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:38,470 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-07-07 13:57:38,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:57:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-07-07 13:57:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 13:57:38,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:38,472 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] [2020-07-07 13:57:38,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:57:38,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -741681537, now seen corresponding path program 1 times [2020-07-07 13:57:38,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:38,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375285440] [2020-07-07 13:57:38,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:38,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:57:38,481 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 13:57:38,487 INFO L168 Benchmark]: Toolchain (without parser) took 2827.07 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 102.7 MB in the beginning and 123.5 MB in the end (delta: -20.8 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,488 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.75 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,490 INFO L168 Benchmark]: Boogie Preprocessor took 144.69 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 181.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,491 INFO L168 Benchmark]: RCFGBuilder took 363.88 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 163.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,492 INFO L168 Benchmark]: TraceAbstraction took 1943.99 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 162.3 MB in the beginning and 123.5 MB in the end (delta: 38.9 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:38,497 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.75 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.69 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 181.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.88 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 163.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1943.99 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 162.3 MB in the beginning and 123.5 MB in the end (delta: 38.9 MB). Peak memory consumption was 69.8 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...