/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/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:00:44,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:00:44,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:00:44,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 14:00:44,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:00:44,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:00:44,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:00:44,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:00:44,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:00:44,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:00:44,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:00:44,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:00:44,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:00:44,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:00:44,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:00:44,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:00:44,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:00:44,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:00:44,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:00:44,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:00:44,216 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 14:00:44,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:00:44,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:00:44,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:00:44,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:00:44,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:00:44,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:00:44,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:00:44,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:00:44,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:00:44,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:00:44,253 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:00:44,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:00:44,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:00:44,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:00:44,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:00:44,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:00:44,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:00:44,254 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:00:44,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:00:44,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:00:44,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:00:44,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:00:44,539 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:00:44,540 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-07 14:00:44,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540db28a1/2d98740d60f34e07946b84aa01a97df3/FLAGe5178429b [2020-07-07 14:00:45,049 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:00:45,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-07 14:00:45,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540db28a1/2d98740d60f34e07946b84aa01a97df3/FLAGe5178429b [2020-07-07 14:00:45,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540db28a1/2d98740d60f34e07946b84aa01a97df3 [2020-07-07 14:00:45,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:00:45,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:00:45,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:00:45,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:00:45,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:00:45,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4dab5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45, skipping insertion in model container [2020-07-07 14:00:45,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:00:45,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:00:45,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:00:45,665 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:00:45,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:00:45,699 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:00:45,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45 WrapperNode [2020-07-07 14:00:45,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:00:45,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:00:45,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:00:45,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:00:45,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (1/1) ... [2020-07-07 14:00:45,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:00:45,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:00:45,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:00:45,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:00:45,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (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 14:00:45,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:00:45,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:00:45,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:00:45,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:00:45,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:00:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:00:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:00:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:00:46,127 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:00:46,127 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 14:00:46,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:00:46 BoogieIcfgContainer [2020-07-07 14:00:46,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:00:46,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:00:46,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:00:46,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:00:46,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:00:45" (1/3) ... [2020-07-07 14:00:46,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f9ec7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:00:46, skipping insertion in model container [2020-07-07 14:00:46,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:45" (2/3) ... [2020-07-07 14:00:46,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f9ec7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:00:46, skipping insertion in model container [2020-07-07 14:00:46,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:00:46" (3/3) ... [2020-07-07 14:00:46,142 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-07-07 14:00:46,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:00:46,163 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:00:46,184 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:00:46,211 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:00:46,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:00:46,212 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:00:46,212 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:00:46,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:00:46,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:00:46,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:00:46,214 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:00:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-07 14:00:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 14:00:46,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,258 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] [2020-07-07 14:00:46,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash -815601615, now seen corresponding path program 1 times [2020-07-07 14:00:46,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110603042] [2020-07-07 14:00:46,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,449 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 14:00:46,450 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110603042] [2020-07-07 14:00:46,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:00:46,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571304500] [2020-07-07 14:00:46,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:00:46,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:00:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:00:46,480 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-07-07 14:00:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:46,516 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-07-07 14:00:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:00:46,518 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-07 14:00:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:46,528 INFO L225 Difference]: With dead ends: 76 [2020-07-07 14:00:46,528 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 14:00:46,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:00:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 14:00:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 14:00:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 14:00:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-07-07 14:00:46,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-07-07 14:00:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,591 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-07-07 14:00:46,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:00:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-07-07 14:00:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 14:00:46,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,594 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] [2020-07-07 14:00:46,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:00:46,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2089093357, now seen corresponding path program 1 times [2020-07-07 14:00:46,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920775790] [2020-07-07 14:00:46,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,721 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 14:00:46,722 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920775790] [2020-07-07 14:00:46,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:00:46,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596105567] [2020-07-07 14:00:46,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:00:46,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:00:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:00:46,726 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-07-07 14:00:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:46,791 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-07-07 14:00:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:00:46,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-07 14:00:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:46,793 INFO L225 Difference]: With dead ends: 51 [2020-07-07 14:00:46,794 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 14:00:46,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:00:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 14:00:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-07 14:00:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 14:00:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-07 14:00:46,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 28 [2020-07-07 14:00:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,812 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-07 14:00:46,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:00:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-07 14:00:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 14:00:46,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 14:00:46,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:00:46,814 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash -594427423, now seen corresponding path program 1 times [2020-07-07 14:00:46,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950579941] [2020-07-07 14:00:46,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,957 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 14:00:46,957 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950579941] [2020-07-07 14:00:46,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:00:46,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361880838] [2020-07-07 14:00:46,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:00:46,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:00:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:00:46,961 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-07-07 14:00:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:47,115 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-07-07 14:00:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:00:47,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-07 14:00:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:47,120 INFO L225 Difference]: With dead ends: 82 [2020-07-07 14:00:47,120 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 14:00:47,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 14:00:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-07-07 14:00:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-07 14:00:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-07-07 14:00:47,141 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 38 [2020-07-07 14:00:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:47,142 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-07-07 14:00:47,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:00:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-07-07 14:00:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 14:00:47,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:47,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 14:00:47,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:00:47,145 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1151378409, now seen corresponding path program 1 times [2020-07-07 14:00:47,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:47,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698654372] [2020-07-07 14:00:47,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:47,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:00:47,155 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 14:00:47,161 INFO L168 Benchmark]: Toolchain (without parser) took 1719.53 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.0 MB in the beginning and 106.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 54.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:47,162 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 14:00:47,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.40 ms. Allocated memory is still 146.8 MB. Free memory was 104.0 MB in the beginning and 94.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:47,164 INFO L168 Benchmark]: Boogie Preprocessor took 29.34 ms. Allocated memory is still 146.8 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:47,165 INFO L168 Benchmark]: RCFGBuilder took 402.72 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 92.4 MB in the beginning and 168.0 MB in the end (delta: -75.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:47,166 INFO L168 Benchmark]: TraceAbstraction took 1024.94 ms. Allocated memory is still 204.5 MB. Free memory was 168.0 MB in the beginning and 106.9 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:47,170 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.40 ms. Allocated memory is still 146.8 MB. Free memory was 104.0 MB in the beginning and 94.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.34 ms. Allocated memory is still 146.8 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.72 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 92.4 MB in the beginning and 168.0 MB in the end (delta: -75.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1024.94 ms. Allocated memory is still 204.5 MB. Free memory was 168.0 MB in the beginning and 106.9 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 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:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...