/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/recursive-simple/fibo_2calls_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:06:14,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:06:14,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:06:14,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:06:14,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:06:14,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:06:14,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:06:14,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:06:14,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:06:14,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:06:14,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:06:14,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:06:14,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:06:14,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:06:14,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:06:14,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:06:14,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:06:14,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:06:14,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:06:14,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:06:14,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:06:14,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:06:14,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:06:14,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:06:14,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:06:14,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:06:14,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:06:14,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:06:14,577 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 13:06:14,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:06:14,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:06:14,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:06:14,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:06:14,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:06:14,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:06:14,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:06:14,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:06:14,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:06:14,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:06:14,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:06:14,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:06:14,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:06:14,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:06:14,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:06:14,612 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:06:14,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:06:14,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:06:14,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:06:14,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:06:14,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:06:14,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:06:14,615 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:06:14,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:06:14,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:06:14,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:06:14,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:06:14,940 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:06:14,941 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-07 13:06:15,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab8c90bc/40f3d56b9988494da8d80db5006a2b81/FLAG0f3d74b4d [2020-07-07 13:06:15,455 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:06:15,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-07 13:06:15,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab8c90bc/40f3d56b9988494da8d80db5006a2b81/FLAG0f3d74b4d [2020-07-07 13:06:15,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab8c90bc/40f3d56b9988494da8d80db5006a2b81 [2020-07-07 13:06:15,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:06:15,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:06:15,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:06:15,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:06:15,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:06:15,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:06:15" (1/1) ... [2020-07-07 13:06:15,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f91bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:15, skipping insertion in model container [2020-07-07 13:06:15,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:06:15" (1/1) ... [2020-07-07 13:06:15,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:06:15,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:06:16,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:06:16,063 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:06:16,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:06:16,093 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:06:16,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16 WrapperNode [2020-07-07 13:06:16,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:06:16,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:06:16,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:06:16,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:06:16,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (1/1) ... [2020-07-07 13:06:16,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:06:16,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:06:16,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:06:16,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:06:16,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (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 13:06:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:06:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:06:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 13:06:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 13:06:16,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:06:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:06:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:06:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 13:06:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 13:06:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:06:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:06:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:06:16,471 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:06:16,472 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:06:16,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:06:16 BoogieIcfgContainer [2020-07-07 13:06:16,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:06:16,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:06:16,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:06:16,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:06:16,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:06:15" (1/3) ... [2020-07-07 13:06:16,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63464cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:06:16, skipping insertion in model container [2020-07-07 13:06:16,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:06:16" (2/3) ... [2020-07-07 13:06:16,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63464cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:06:16, skipping insertion in model container [2020-07-07 13:06:16,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:06:16" (3/3) ... [2020-07-07 13:06:16,486 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2020-07-07 13:06:16,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:06:16,500 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:06:16,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:06:16,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:06:16,535 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:06:16,535 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:06:16,535 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:06:16,535 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:06:16,535 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:06:16,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:06:16,536 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:06:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-07 13:06:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:06:16,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:06:16,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:06:16,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:06:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:06:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-07 13:06:16,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:06:16,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688320289] [2020-07-07 13:06:16,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:06:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:16,784 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 13:06:16,785 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:06:16,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688320289] [2020-07-07 13:06:16,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:06:16,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:06:16,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875074291] [2020-07-07 13:06:16,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:06:16,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:06:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:06:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:06:16,826 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-07 13:06:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:06:16,967 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-07 13:06:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:06:16,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:06:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:06:16,981 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:06:16,981 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 13:06:16,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 13:06:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 13:06:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 13:06:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:06:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:06:17,034 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-07 13:06:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:06:17,034 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:06:17,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:06:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:06:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:06:17,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:06:17,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:06:17,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:06:17,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:06:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:06:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-07 13:06:17,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:06:17,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743819624] [2020-07-07 13:06:17,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:06:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:06:17,113 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 13:06:17,114 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:06:17,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743819624] [2020-07-07 13:06:17,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:06:17,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:06:17,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366738437] [2020-07-07 13:06:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:06:17,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:06:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:06:17,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:06:17,121 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-07 13:06:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:06:17,199 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 13:06:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:06:17,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-07 13:06:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:06:17,202 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:06:17,202 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:06:17,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 13:06:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:06:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-07 13:06:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:06:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:06:17,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-07 13:06:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:06:17,219 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:06:17,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:06:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:06:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:06:17,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:06:17,222 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] [2020-07-07 13:06:17,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:06:17,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:06:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:06:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-07 13:06:17,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:06:17,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955038020] [2020-07-07 13:06:17,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:06:17,245 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:133) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.fastUprAcceleration(Accelerator.java:101) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.accelerateLoop(Accelerator.java:82) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:219) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:06:17,251 INFO L168 Benchmark]: Toolchain (without parser) took 1426.27 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 103.1 MB in the beginning and 120.9 MB in the end (delta: -17.8 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,252 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.09 ms. Allocated memory is still 144.2 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,254 INFO L168 Benchmark]: Boogie Preprocessor took 26.01 ms. Allocated memory is still 144.2 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,255 INFO L168 Benchmark]: RCFGBuilder took 355.25 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 166.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,256 INFO L168 Benchmark]: TraceAbstraction took 770.73 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 120.9 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:06:17,261 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.09 ms. Allocated memory is still 144.2 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.01 ms. Allocated memory is still 144.2 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.25 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 166.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 770.73 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 120.9 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...