/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s42iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:53:26,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:53:26,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:53:26,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:53:26,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:53:26,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:53:26,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:53:26,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:53:26,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:53:26,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:53:26,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:53:26,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:53:26,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:53:26,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:53:26,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:53:26,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:53:26,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:53:26,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:53:26,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:53:26,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:53:26,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:53:26,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:53:26,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:53:26,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:53:26,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 14:53:26,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 14:53:26,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 14:53:26,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 14:53:26,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 14:53:26,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 14:53:26,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:53:26,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:53:26,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:53:26,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:53:26,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:53:26,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:53:26,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:53:26,588 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:53:26,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:53:26,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:53:26,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:53:26,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:53:26,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:53:26,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:53:26,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:53:26,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:53:26,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:53:26,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:53:26,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:53:26,592 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:53:26,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:53:26,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:53:26,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:53:26,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:53:26,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:53:26,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:53:26,593 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:53:26,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:53:26,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:53:26,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:53:26,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:53:26,927 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:53:26,928 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-17 14:53:27,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50742c364/3420fc07d9e44a8dab1447bf95621eea/FLAG8f03feaa2 [2020-07-17 14:53:27,501 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:53:27,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-17 14:53:27,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50742c364/3420fc07d9e44a8dab1447bf95621eea/FLAG8f03feaa2 [2020-07-17 14:53:27,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50742c364/3420fc07d9e44a8dab1447bf95621eea [2020-07-17 14:53:27,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:53:27,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:53:27,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:27,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:53:27,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:53:27,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:27" (1/1) ... [2020-07-17 14:53:27,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252aaefd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:27, skipping insertion in model container [2020-07-17 14:53:27,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:27" (1/1) ... [2020-07-17 14:53:27,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:53:27,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:53:28,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:28,189 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:53:28,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:28,232 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:53:28,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28 WrapperNode [2020-07-17 14:53:28,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:28,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:53:28,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:53:28,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:53:28,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (1/1) ... [2020-07-17 14:53:28,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:53:28,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:53:28,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:53:28,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:53:28,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (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 [2020-07-17 14:53:28,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:53:28,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:53:28,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 14:53:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:53:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:53:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:53:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 14:53:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 14:53:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:53:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 14:53:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 14:53:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:53:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:53:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 14:53:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 14:53:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 14:53:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:53:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:53:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:53:28,765 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:53:28,766 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 14:53:28,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:28 BoogieIcfgContainer [2020-07-17 14:53:28,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:53:28,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:53:28,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:53:28,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:53:28,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:53:27" (1/3) ... [2020-07-17 14:53:28,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69bdea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:28, skipping insertion in model container [2020-07-17 14:53:28,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:28" (2/3) ... [2020-07-17 14:53:28,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69bdea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:28, skipping insertion in model container [2020-07-17 14:53:28,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:28" (3/3) ... [2020-07-17 14:53:28,779 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2020-07-17 14:53:28,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:53:28,822 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:53:28,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:53:28,871 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:53:28,871 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:53:28,871 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:53:28,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:53:28,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:53:28,872 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:53:28,872 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:53:28,872 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:53:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-07-17 14:53:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 14:53:28,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:28,904 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] [2020-07-17 14:53:28,904 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 350973390, now seen corresponding path program 1 times [2020-07-17 14:53:28,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:28,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525848360] [2020-07-17 14:53:28,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:29,152 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:29,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525848360] [2020-07-17 14:53:29,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:29,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 14:53:29,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921917726] [2020-07-17 14:53:29,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 14:53:29,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 14:53:29,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:29,183 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-07-17 14:53:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:29,428 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-07-17 14:53:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 14:53:29,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-17 14:53:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:29,442 INFO L225 Difference]: With dead ends: 143 [2020-07-17 14:53:29,443 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 14:53:29,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 14:53:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-17 14:53:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 14:53:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-07-17 14:53:29,506 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 33 [2020-07-17 14:53:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:29,507 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-07-17 14:53:29,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 14:53:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-07-17 14:53:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 14:53:29,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:29,509 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] [2020-07-17 14:53:29,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:53:29,510 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:29,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1688115303, now seen corresponding path program 1 times [2020-07-17 14:53:29,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:29,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506634711] [2020-07-17 14:53:29,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:29,655 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:29,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506634711] [2020-07-17 14:53:29,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:29,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:53:29,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984782833] [2020-07-17 14:53:29,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:53:29,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:29,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:53:29,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:53:29,659 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-07-17 14:53:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:29,997 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-07-17 14:53:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 14:53:29,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-17 14:53:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:30,000 INFO L225 Difference]: With dead ends: 142 [2020-07-17 14:53:30,000 INFO L226 Difference]: Without dead ends: 102 [2020-07-17 14:53:30,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:53:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-17 14:53:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-07-17 14:53:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-17 14:53:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-07-17 14:53:30,018 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 33 [2020-07-17 14:53:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:30,019 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-07-17 14:53:30,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:53:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-07-17 14:53:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 14:53:30,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:30,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:30,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:53:30,022 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1790069826, now seen corresponding path program 1 times [2020-07-17 14:53:30,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:30,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713153088] [2020-07-17 14:53:30,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:30,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:53:30,065 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:458) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:290) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) 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) [2020-07-17 14:53:30,075 INFO L168 Benchmark]: Toolchain (without parser) took 2130.57 ms. Allocated memory was 137.9 MB in the beginning and 233.3 MB in the end (delta: 95.4 MB). Free memory was 103.2 MB in the beginning and 193.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:30,077 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 14:53:30,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.65 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 92.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:30,080 INFO L168 Benchmark]: Boogie Preprocessor took 123.16 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 178.7 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:30,081 INFO L168 Benchmark]: RCFGBuilder took 414.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 157.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:30,083 INFO L168 Benchmark]: TraceAbstraction took 1298.39 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 193.0 MB in the end (delta: -36.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 14:53:30,093 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 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.65 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 92.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.16 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 178.7 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 157.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1298.39 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 193.0 MB in the end (delta: -36.3 MB). There was no memory consumed. 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:458) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...