/usr/bin/java -ea -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-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:48:20,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:48:20,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:48:20,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:48:20,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:48:20,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:48:20,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:48:20,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:48:20,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:48:20,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:48:20,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:48:20,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:48:20,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:48:20,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:48:20,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:48:20,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:48:20,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:48:20,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:48:20,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:48:20,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:48:20,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:48:20,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:48:20,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:48:20,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:48:20,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:48:20,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:48:20,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:48:20,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:48:20,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:48:20,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:48:20,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:48:20,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:48:20,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:48:20,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:48:20,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:48:20,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:48:20,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:48:20,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:48:20,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:48:20,312 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:48:20,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:48:20,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:48:20,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:48:20,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:48:20,312 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:48:20,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:48:20,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:48:20,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:48:20,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:48:20,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:48:20,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:48:20,317 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:48:20,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:48:20,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:48:20,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:48:20,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:48:20,591 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:48:20,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-07-18 00:48:20,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a5f936b/b6e42ab65cd54255968def0c1c59ea30/FLAGafbc9d3ad [2020-07-18 00:48:21,143 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:48:21,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-07-18 00:48:21,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a5f936b/b6e42ab65cd54255968def0c1c59ea30/FLAGafbc9d3ad [2020-07-18 00:48:21,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a5f936b/b6e42ab65cd54255968def0c1c59ea30 [2020-07-18 00:48:21,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:48:21,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:48:21,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:48:21,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:48:21,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:48:21,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7449ceae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21, skipping insertion in model container [2020-07-18 00:48:21,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:48:21,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:48:21,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:48:21,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:48:21,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:48:21,753 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:48:21,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21 WrapperNode [2020-07-18 00:48:21,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:48:21,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:48:21,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:48:21,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:48:21,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (1/1) ... [2020-07-18 00:48:21,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:48:21,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:48:21,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:48:21,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:48:21,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (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 [2020-07-18 00:48:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 00:48:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 00:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:48:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:48:22,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:48:22,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-18 00:48:22,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:48:22 BoogieIcfgContainer [2020-07-18 00:48:22,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:48:22,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:48:22,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:48:22,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:48:22,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:48:21" (1/3) ... [2020-07-18 00:48:22,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d79d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:48:22, skipping insertion in model container [2020-07-18 00:48:22,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:21" (2/3) ... [2020-07-18 00:48:22,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d79d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:48:22, skipping insertion in model container [2020-07-18 00:48:22,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:48:22" (3/3) ... [2020-07-18 00:48:22,144 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-07-18 00:48:22,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:48:22,168 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:48:22,198 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:48:22,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:48:22,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:48:22,256 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:48:22,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:48:22,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:48:22,257 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:48:22,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:48:22,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:48:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-18 00:48:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-18 00:48:22,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:48:22,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:48:22,288 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:48:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:48:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-07-18 00:48:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:48:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235030054] [2020-07-18 00:48:22,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:48:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:48:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:48:22,451 INFO L280 TraceCheckUtils]: 0: Hoare triple {25#true} assume true; {25#true} is VALID [2020-07-18 00:48:22,452 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {25#true} {25#true} #36#return; {25#true} is VALID [2020-07-18 00:48:22,454 INFO L263 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {25#true} is VALID [2020-07-18 00:48:22,456 INFO L280 TraceCheckUtils]: 1: Hoare triple {25#true} assume true; {25#true} is VALID [2020-07-18 00:48:22,456 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} #36#return; {25#true} is VALID [2020-07-18 00:48:22,457 INFO L263 TraceCheckUtils]: 3: Hoare triple {25#true} call #t~ret1 := main(); {25#true} is VALID [2020-07-18 00:48:22,457 INFO L280 TraceCheckUtils]: 4: Hoare triple {25#true} ~x~0 := 0; {25#true} is VALID [2020-07-18 00:48:22,457 INFO L280 TraceCheckUtils]: 5: Hoare triple {25#true} ~y~0 := 1; {25#true} is VALID [2020-07-18 00:48:22,459 INFO L280 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2020-07-18 00:48:22,460 INFO L263 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 64 != ~y~0 % 4294967296 then 1 else 0)); {26#false} is VALID [2020-07-18 00:48:22,460 INFO L280 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2020-07-18 00:48:22,461 INFO L280 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2020-07-18 00:48:22,461 INFO L280 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2020-07-18 00:48:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:48:22,467 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:48:22,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235030054] [2020-07-18 00:48:22,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:48:22,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-18 00:48:22,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473239163] [2020-07-18 00:48:22,480 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-18 00:48:22,487 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:48:22,491 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-18 00:48:22,532 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:22,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-18 00:48:22,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 00:48:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-18 00:48:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 00:48:22,545 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-18 00:48:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:22,630 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-18 00:48:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-18 00:48:22,630 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-18 00:48:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 00:48:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 00:48:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-18 00:48:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 00:48:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-18 00:48:22,648 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 36 transitions. [2020-07-18 00:48:22,720 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:22,734 INFO L225 Difference]: With dead ends: 33 [2020-07-18 00:48:22,735 INFO L226 Difference]: Without dead ends: 16 [2020-07-18 00:48:22,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 00:48:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-18 00:48:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-18 00:48:22,791 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 00:48:22,792 INFO L82 GeneralOperation]: Start isEquivalent. First operand 16 states. Second operand 16 states. [2020-07-18 00:48:22,793 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-18 00:48:22,793 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-18 00:48:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:22,797 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-07-18 00:48:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-18 00:48:22,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:48:22,798 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:48:22,799 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-18 00:48:22,799 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-18 00:48:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:22,803 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-07-18 00:48:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-18 00:48:22,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:48:22,804 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:48:22,805 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 00:48:22,805 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 00:48:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-18 00:48:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-18 00:48:22,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-07-18 00:48:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 00:48:22,811 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-18 00:48:22,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-18 00:48:22,811 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 16 states and 16 transitions. [2020-07-18 00:48:22,842 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-18 00:48:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-18 00:48:22,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:48:22,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:48:22,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:48:22,844 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:48:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:48:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-07-18 00:48:22,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:48:22,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521605934] [2020-07-18 00:48:22,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:48:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:48:22,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 00:48:22,891 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.ProofTermGenerator.convert(ProofTermGenerator.java:150) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getProof(SMTInterpol.java:797) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:283) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-18 00:48:22,898 INFO L168 Benchmark]: Toolchain (without parser) took 1394.44 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 102.9 MB in the beginning and 124.5 MB in the end (delta: -21.6 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:22,899 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 00:48:22,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:22,901 INFO L168 Benchmark]: Boogie Preprocessor took 118.87 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 93.1 MB in the beginning and 184.4 MB in the end (delta: -91.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:22,902 INFO L168 Benchmark]: RCFGBuilder took 261.80 ms. Allocated memory is still 204.5 MB. Free memory was 184.4 MB in the beginning and 169.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:22,903 INFO L168 Benchmark]: TraceAbstraction took 757.60 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 124.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:22,907 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.87 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 93.1 MB in the beginning and 184.4 MB in the end (delta: -91.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.80 ms. Allocated memory is still 204.5 MB. Free memory was 184.4 MB in the beginning and 169.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 757.60 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 124.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...