/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:49:35,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:49:35,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:49:35,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:49:35,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:49:35,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:49:35,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:49:35,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:49:35,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:49:35,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:49:35,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:49:35,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:49:35,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:49:35,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:49:35,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:49:35,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:49:35,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:49:35,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:49:35,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:49:35,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:49:35,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:49:35,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:49:35,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:49:35,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:49:35,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 17:49:35,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 17:49:35,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 17:49:35,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 17:49:35,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 17:49:35,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 17:49:35,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 17:49:35,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 17:49:35,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 17:49:35,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 17:49:35,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 17:49:35,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 17:49:35,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 17:49:35,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 17:49:35,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:49:35,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:49:35,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:49:35,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:49:35,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:49:35,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:49:35,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:49:35,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:49:35,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:49:35,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:49:35,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:49:35,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:49:35,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:49:35,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:49:35,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:49:35,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:49:35,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:49:35,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:49:35,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:49:35,977 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:49:35,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:49:35,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:49:35,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:35,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:49:35,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:49:35,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:49:35,978 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:49:36,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:49:36,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:49:36,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:49:36,454 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:49:36,455 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:49:36,456 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-04 17:49:36,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d50e7db/a2840a5668d445c386db568e0addc586/FLAG0dc5008db [2020-09-04 17:49:37,110 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:49:37,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-04 17:49:37,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d50e7db/a2840a5668d445c386db568e0addc586/FLAG0dc5008db [2020-09-04 17:49:37,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d50e7db/a2840a5668d445c386db568e0addc586 [2020-09-04 17:49:37,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:49:37,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:49:37,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:37,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:49:37,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:49:37,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc106bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37, skipping insertion in model container [2020-09-04 17:49:37,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:49:37,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:49:37,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:37,763 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:49:37,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:37,804 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:49:37,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37 WrapperNode [2020-09-04 17:49:37,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:37,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:49:37,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:49:37,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:49:37,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... [2020-09-04 17:49:37,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:49:37,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:49:37,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:49:37,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:49:37,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:49:38,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:49:38,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:49:38,010 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:49:38,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:49:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:49:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:49:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:49:38,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:49:38,241 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 17:49:38,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:38 BoogieIcfgContainer [2020-09-04 17:49:38,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:49:38,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:49:38,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:49:38,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:49:38,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:49:37" (1/3) ... [2020-09-04 17:49:38,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6474ebce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:38, skipping insertion in model container [2020-09-04 17:49:38,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:37" (2/3) ... [2020-09-04 17:49:38,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6474ebce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:38, skipping insertion in model container [2020-09-04 17:49:38,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:38" (3/3) ... [2020-09-04 17:49:38,255 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2020-09-04 17:49:38,264 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:49:38,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:49:38,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:49:38,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:49:38,321 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:49:38,321 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:49:38,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:49:38,322 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:49:38,322 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:49:38,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:49:38,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:49:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-04 17:49:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 17:49:38,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:38,355 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] [2020-09-04 17:49:38,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:38,362 INFO L82 PathProgramCache]: Analyzing trace with hash 341466613, now seen corresponding path program 1 times [2020-09-04 17:49:38,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:38,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493907038] [2020-09-04 17:49:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:38,446 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:38,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:38,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493907038] [2020-09-04 17:49:38,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:38,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:49:38,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477426970] [2020-09-04 17:49:38,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:49:38,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:49:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:49:38,675 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-09-04 17:49:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:38,862 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-04 17:49:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:49:38,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-04 17:49:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:38,879 INFO L225 Difference]: With dead ends: 51 [2020-09-04 17:49:38,879 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 17:49:38,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 17:49:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-04 17:49:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 17:49:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-04 17:49:38,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2020-09-04 17:49:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:38,940 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-04 17:49:38,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:49:38,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-04 17:49:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 17:49:38,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:38,942 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] [2020-09-04 17:49:38,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:49:38,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash 178703795, now seen corresponding path program 1 times [2020-09-04 17:49:38,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:38,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521587621] [2020-09-04 17:49:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:38,969 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:39,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:39,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521587621] [2020-09-04 17:49:39,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:39,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:49:39,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672533690] [2020-09-04 17:49:39,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:49:39,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:49:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:49:39,159 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-04 17:49:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:39,409 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-04 17:49:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:49:39,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-04 17:49:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:39,411 INFO L225 Difference]: With dead ends: 38 [2020-09-04 17:49:39,411 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 17:49:39,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:49:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 17:49:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-04 17:49:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 17:49:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-09-04 17:49:39,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-09-04 17:49:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:39,425 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-09-04 17:49:39,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:49:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-09-04 17:49:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:49:39,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:39,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:39,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:49:39,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 563687025, now seen corresponding path program 2 times [2020-09-04 17:49:39,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:39,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960068924] [2020-09-04 17:49:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:39,434 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:39,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960068924] [2020-09-04 17:49:39,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:49:39,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774430072] [2020-09-04 17:49:39,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:49:39,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:49:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:49:39,663 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-09-04 17:49:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:39,933 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-04 17:49:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:49:39,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-04 17:49:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:39,935 INFO L225 Difference]: With dead ends: 42 [2020-09-04 17:49:39,935 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 17:49:39,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:49:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 17:49:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-04 17:49:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 17:49:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-04 17:49:39,946 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2020-09-04 17:49:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:39,946 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-04 17:49:39,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:49:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-04 17:49:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 17:49:39,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:39,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:39,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:49:39,948 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1026490321, now seen corresponding path program 3 times [2020-09-04 17:49:39,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:39,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700059399] [2020-09-04 17:49:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:39,953 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:40,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700059399] [2020-09-04 17:49:40,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:40,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:49:40,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804327519] [2020-09-04 17:49:40,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:49:40,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:49:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:49:40,117 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2020-09-04 17:49:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:40,469 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-04 17:49:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 17:49:40,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-04 17:49:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:40,472 INFO L225 Difference]: With dead ends: 46 [2020-09-04 17:49:40,472 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 17:49:40,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:49:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 17:49:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-04 17:49:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 17:49:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-04 17:49:40,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2020-09-04 17:49:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:40,494 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-04 17:49:40,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:49:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-04 17:49:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 17:49:40,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:40,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:40,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:49:40,499 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2083373805, now seen corresponding path program 4 times [2020-09-04 17:49:40,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:40,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206162786] [2020-09-04 17:49:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:40,506 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:40,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:40,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206162786] [2020-09-04 17:49:40,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:40,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:49:40,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118267092] [2020-09-04 17:49:40,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:49:40,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:49:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:49:40,800 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2020-09-04 17:49:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:41,227 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-04 17:49:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:49:41,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-04 17:49:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:41,229 INFO L225 Difference]: With dead ends: 50 [2020-09-04 17:49:41,229 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 17:49:41,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:49:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 17:49:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-04 17:49:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 17:49:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-04 17:49:41,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2020-09-04 17:49:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:41,239 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-04 17:49:41,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:49:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-04 17:49:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:49:41,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:41,241 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:41,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:49:41,242 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash -540084565, now seen corresponding path program 5 times [2020-09-04 17:49:41,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:41,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386130741] [2020-09-04 17:49:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:41,246 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:41,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386130741] [2020-09-04 17:49:41,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:41,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:49:41,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716574079] [2020-09-04 17:49:41,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:49:41,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:49:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:49:41,331 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 9 states. [2020-09-04 17:49:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:41,523 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-04 17:49:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:49:41,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-04 17:49:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:41,526 INFO L225 Difference]: With dead ends: 42 [2020-09-04 17:49:41,527 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:49:41,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:49:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:49:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:49:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:49:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:49:41,528 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-04 17:49:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:41,531 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:49:41,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:49:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:49:41,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:49:41,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:49:41,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:49:42,171 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,171 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-09-04 17:49:42,171 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_144~0 |old(~__return_144~0)|)) [2020-09-04 17:49:42,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,172 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:42,172 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-04 17:49:42,173 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-04 17:49:42,173 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-04 17:49:42,173 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-04 17:49:42,173 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-04 17:49:42,173 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (and (<= (+ main_~main__x~0 1) main_~main__y~0) (= |old(~__return_144~0)| ~__return_144~0)) [2020-09-04 17:49:42,173 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,173 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 58) the Hoare annotation is: true [2020-09-04 17:49:42,175 INFO L264 CegarLoopResult]: At program point L23(lines 23 56) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,175 INFO L271 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: true [2020-09-04 17:49:42,175 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,175 INFO L264 CegarLoopResult]: At program point L17(lines 17 57) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,175 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-04 17:49:42,175 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-09-04 17:49:42,177 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 11 58) the Hoare annotation is: true [2020-09-04 17:49:42,177 INFO L264 CegarLoopResult]: At program point L44(lines 44 53) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0) .cse2) (and .cse0 .cse1 (<= 15 main_~main__y~0) (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0)) .cse2))) [2020-09-04 17:49:42,177 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0) .cse1) (and .cse0 (<= 15 main_~main__y~0) (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0)) .cse1))) [2020-09-04 17:49:42,178 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= 15 main_~main__y~0) (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0)) .cse0) (and (<= 2 main_~main__y~0) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2020-09-04 17:49:42,178 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= (+ main_~main__x~0 1) main_~main__y~0) (= |old(~__return_144~0)| ~__return_144~0)) [2020-09-04 17:49:42,178 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= (+ main_~main__x~0 1) 0) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0) (and .cse0 (<= (+ main_~main__x~0 50) 0)))) [2020-09-04 17:49:42,178 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) the Hoare annotation is: false [2020-09-04 17:49:42,178 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-04 17:49:42,179 INFO L264 CegarLoopResult]: At program point L51(line 51) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-04 17:49:42,179 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,179 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,179 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: false [2020-09-04 17:49:42,179 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-04 17:49:42,180 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (= |old(~__return_144~0)| ~__return_144~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 17:49:42,180 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0) .cse1) (and .cse0 (<= 15 main_~main__y~0) (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0)) .cse1))) [2020-09-04 17:49:42,180 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (<= 15 main_~main__y~0) (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0)) .cse0) (and (<= 2 main_~main__y~0) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2020-09-04 17:49:42,180 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2020-09-04 17:49:42,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:49:42 BoogieIcfgContainer [2020-09-04 17:49:42,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:49:42,208 INFO L168 Benchmark]: Toolchain (without parser) took 4723.63 ms. Allocated memory was 137.4 MB in the beginning and 250.6 MB in the end (delta: 113.2 MB). Free memory was 101.2 MB in the beginning and 176.0 MB in the end (delta: -74.8 MB). Peak memory consumption was 122.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:42,209 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:49:42,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.14 ms. Allocated memory is still 137.4 MB. Free memory was 100.8 MB in the beginning and 91.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:42,211 INFO L168 Benchmark]: Boogie Preprocessor took 115.13 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 179.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:42,212 INFO L168 Benchmark]: RCFGBuilder took 323.21 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 166.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:42,213 INFO L168 Benchmark]: TraceAbstraction took 3958.31 ms. Allocated memory was 200.8 MB in the beginning and 250.6 MB in the end (delta: 49.8 MB). Free memory was 165.4 MB in the beginning and 176.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:42,217 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.14 ms. Allocated memory is still 137.4 MB. Free memory was 100.8 MB in the beginning and 91.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.13 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 179.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 323.21 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 166.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3958.31 ms. Allocated memory was 200.8 MB in the beginning and 250.6 MB in the end (delta: 49.8 MB). Free memory was 165.4 MB in the beginning and 176.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (\old(__return_144) == __return_144 && main__x + 50 <= 0) || (main__x + 2 <= main__y && \old(__return_144) == __return_144) - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 259 SDslu, 209 SDs, 0 SdLazy, 851 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 34 PreInvPairs, 84 NumberOfFragments, 323 HoareAnnotationTreeSize, 34 FomulaSimplifications, 1456 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 34 FomulaSimplificationsInter, 413 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...