/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/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:49:16,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:49:16,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:49:16,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:49:16,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:49:16,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:49:16,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:49:16,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:49:16,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:49:16,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:49:16,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:49:16,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:49:16,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:49:16,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:49:16,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:49:16,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:49:16,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:49:16,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:49:16,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:49:16,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:49:16,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:49:16,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:49:16,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:49:16,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:49:16,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:49:16,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:49:16,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:49:16,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:49:16,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:49:16,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:49:16,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:49:16,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:49:16,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:49:16,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:49:16,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:49:16,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:49:16,901 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:49:16,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:49:16,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:49:16,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:16,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:49:16,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:49:16,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:49:16,903 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:49:17,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:49:17,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:49:17,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:49:17,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:49:17,221 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:49:17,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-22 18:49:17,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8507ff1fe/8994d71abd3f4559b537469830d2c912/FLAG03941d8da [2020-08-22 18:49:17,736 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:49:17,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-22 18:49:17,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8507ff1fe/8994d71abd3f4559b537469830d2c912/FLAG03941d8da [2020-08-22 18:49:18,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8507ff1fe/8994d71abd3f4559b537469830d2c912 [2020-08-22 18:49:18,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:49:18,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:49:18,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:18,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:49:18,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:49:18,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79635ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18, skipping insertion in model container [2020-08-22 18:49:18,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:49:18,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:49:18,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:18,380 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:49:18,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:18,404 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:49:18,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18 WrapperNode [2020-08-22 18:49:18,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:18,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:49:18,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:49:18,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:49:18,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (1/1) ... [2020-08-22 18:49:18,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:49:18,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:49:18,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:49:18,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:49:18,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (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 [2020-08-22 18:49:18,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:49:18,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:49:18,577 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:49:18,577 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 18:49:18,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:49:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:49:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:49:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:49:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 18:49:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:49:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:49:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:49:18,769 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:49:18,770 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:49:18,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:18 BoogieIcfgContainer [2020-08-22 18:49:18,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:49:18,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:49:18,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:49:18,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:49:18,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:49:18" (1/3) ... [2020-08-22 18:49:18,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0f4b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:18, skipping insertion in model container [2020-08-22 18:49:18,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:18" (2/3) ... [2020-08-22 18:49:18,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0f4b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:18, skipping insertion in model container [2020-08-22 18:49:18,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:18" (3/3) ... [2020-08-22 18:49:18,783 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-08-22 18:49:18,795 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:49:18,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:49:18,818 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:49:18,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:49:18,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:49:18,862 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:49:18,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:49:18,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:49:18,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:49:18,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:49:18,864 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:49:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 18:49:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:49:18,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:18,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:18,904 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -588914908, now seen corresponding path program 1 times [2020-08-22 18:49:18,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:18,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352472771] [2020-08-22 18:49:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:18,993 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:49:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:19,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352472771] [2020-08-22 18:49:19,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:19,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965598691] [2020-08-22 18:49:19,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:19,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:19,206 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-08-22 18:49:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:19,310 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 18:49:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:49:19,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:49:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:19,322 INFO L225 Difference]: With dead ends: 46 [2020-08-22 18:49:19,322 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 18:49:19,326 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 [2020-08-22 18:49:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 18:49:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-08-22 18:49:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 18:49:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 18:49:19,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-08-22 18:49:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:19,372 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 18:49:19,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 18:49:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 18:49:19,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:19,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:19,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:49:19,376 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1852809946, now seen corresponding path program 1 times [2020-08-22 18:49:19,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:19,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271232946] [2020-08-22 18:49:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:19,380 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:49:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:19,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271232946] [2020-08-22 18:49:19,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:19,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:49:19,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034953560] [2020-08-22 18:49:19,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:49:19,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:49:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:49:19,514 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-08-22 18:49:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:19,610 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-22 18:49:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:49:19,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 18:49:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:19,613 INFO L225 Difference]: With dead ends: 45 [2020-08-22 18:49:19,613 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 18:49:19,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:49:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 18:49:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 18:49:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 18:49:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-08-22 18:49:19,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2020-08-22 18:49:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:19,629 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-08-22 18:49:19,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:49:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-08-22 18:49:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 18:49:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:19,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:19,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:49:19,632 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -238705980, now seen corresponding path program 1 times [2020-08-22 18:49:19,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:19,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066506989] [2020-08-22 18:49:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:19,726 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:49:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:49:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:49:19,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:49:19,841 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: has to be unsat by construction, we do check only for interpolant computation at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) 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:100) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:294) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:49:19,847 INFO L168 Benchmark]: Toolchain (without parser) took 1679.62 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 104.4 MB in the beginning and 106.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 54.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,848 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.01 ms. Allocated memory is still 147.3 MB. Free memory was 104.2 MB in the beginning and 94.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,850 INFO L168 Benchmark]: Boogie Preprocessor took 109.80 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 94.8 MB in the beginning and 183.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,851 INFO L168 Benchmark]: RCFGBuilder took 259.03 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 169.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,852 INFO L168 Benchmark]: TraceAbstraction took 1068.05 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 106.4 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:19,856 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.01 ms. Allocated memory is still 147.3 MB. Free memory was 104.2 MB in the beginning and 94.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.80 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 94.8 MB in the beginning and 183.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.03 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 169.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1068.05 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 106.4 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: has to be unsat by construction, we do check only for interpolant computation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: has to be unsat by construction, we do check only for interpolant computation: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...