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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:00,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:00,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:00,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:00,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:00,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:00,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:00,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:00,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:00,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:00,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:00,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:00,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:00,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:00,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:00,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:00,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:00,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:00,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:00,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:00,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:00,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:00,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:00,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:00,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 12:59:00,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 12:59:00,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 12:59:00,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 12:59:00,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 12:59:00,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 12:59:00,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:00,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:00,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:00,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:00,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:00,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:00,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:00,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:00,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:00,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:00,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:00,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:59:00,397 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:00,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:00,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:00,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:00,399 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:00,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:00,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:00,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:00,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:00,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:00,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:00,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:00,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:00,401 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:00,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:00,401 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:00,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:00,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:00,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:00,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:00,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:00,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:00,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:00,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:00,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:00,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:00,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:00,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:00,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:00,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:00,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:00,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:00,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:00,448 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:00,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2019-09-20 12:59:00,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdd77d36/abbfed9a17a94c61b80a50e2402401e5/FLAGe42b8b58c [2019-09-20 12:59:00,932 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:00,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2019-09-20 12:59:00,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdd77d36/abbfed9a17a94c61b80a50e2402401e5/FLAGe42b8b58c [2019-09-20 12:59:01,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdd77d36/abbfed9a17a94c61b80a50e2402401e5 [2019-09-20 12:59:01,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:01,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:01,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:01,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:01,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:01,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308413e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01, skipping insertion in model container [2019-09-20 12:59:01,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,351 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:01,367 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:01,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:01,542 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:01,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:01,573 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:01,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01 WrapperNode [2019-09-20 12:59:01,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:01,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:01,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:01,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:01,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (1/1) ... [2019-09-20 12:59:01,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:01,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:01,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:01,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:01,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (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 [2019-09-20 12:59:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:01,925 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:01,926 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:59:01,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:01 BoogieIcfgContainer [2019-09-20 12:59:01,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:01,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:01,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:01,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:01,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:01" (1/3) ... [2019-09-20 12:59:01,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ac085b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:01, skipping insertion in model container [2019-09-20 12:59:01,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:01" (2/3) ... [2019-09-20 12:59:01,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ac085b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:01, skipping insertion in model container [2019-09-20 12:59:01,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:01" (3/3) ... [2019-09-20 12:59:01,935 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2019-09-20 12:59:01,945 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:01,953 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:01,969 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:02,000 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:02,001 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:02,001 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:02,002 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:02,002 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:02,002 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:02,002 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:02,002 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:02,003 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-20 12:59:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:59:02,024 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:02,025 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:02,027 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1712389503, now seen corresponding path program 1 times [2019-09-20 12:59:02,033 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:02,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:02,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:02,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:02,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:02,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:02,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:02,162 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-20 12:59:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:02,186 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2019-09-20 12:59:02,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:02,187 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:59:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:02,197 INFO L225 Difference]: With dead ends: 35 [2019-09-20 12:59:02,198 INFO L226 Difference]: Without dead ends: 15 [2019-09-20 12:59:02,201 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-20 12:59:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-20 12:59:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 12:59:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-20 12:59:02,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-20 12:59:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:02,246 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-20 12:59:02,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-20 12:59:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:59:02,247 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:02,247 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:02,247 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1704941753, now seen corresponding path program 1 times [2019-09-20 12:59:02,248 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:02,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:02,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:02,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,256 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:02,257 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:02,257 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-20 12:59:02,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:02,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:59:02,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:02,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:02,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:59:02,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:59:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:59:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:02,405 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-09-20 12:59:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:02,522 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-09-20 12:59:02,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:02,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 12:59:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:02,523 INFO L225 Difference]: With dead ends: 25 [2019-09-20 12:59:02,524 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 12:59:02,525 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 12:59:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-20 12:59:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-20 12:59:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-09-20 12:59:02,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2019-09-20 12:59:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:02,536 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-09-20 12:59:02,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:59:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-09-20 12:59:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 12:59:02,537 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:02,538 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:02,539 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:02,539 INFO L82 PathProgramCache]: Analyzing trace with hash 241116926, now seen corresponding path program 1 times [2019-09-20 12:59:02,539 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:02,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:02,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:02,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,555 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:02,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:02,557 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:02,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:02,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-20 12:59:02,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:02,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:02,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-20 12:59:02,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:59:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:59:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:02,725 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2019-09-20 12:59:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:02,935 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-09-20 12:59:02,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:59:02,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-20 12:59:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:02,937 INFO L225 Difference]: With dead ends: 32 [2019-09-20 12:59:02,937 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:02,937 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:59:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-20 12:59:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:59:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-20 12:59:02,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2019-09-20 12:59:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:02,945 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-20 12:59:02,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:59:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-20 12:59:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 12:59:02,946 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:02,946 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:02,947 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 311210265, now seen corresponding path program 2 times [2019-09-20 12:59:02,947 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:02,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:02,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:02,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:02,953 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:02,953 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:02,954 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:02,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:02,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:02,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:02,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:59:03,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:03,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:03,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-20 12:59:03,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:59:03,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:59:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:59:03,101 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2019-09-20 12:59:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:03,245 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-09-20 12:59:03,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:59:03,246 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-20 12:59:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:03,247 INFO L225 Difference]: With dead ends: 39 [2019-09-20 12:59:03,248 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 12:59:03,248 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:59:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 12:59:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-20 12:59:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 12:59:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-20 12:59:03,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2019-09-20 12:59:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:03,256 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-20 12:59:03,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:59:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-20 12:59:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 12:59:03,258 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:03,258 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:03,258 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -928013666, now seen corresponding path program 3 times [2019-09-20 12:59:03,259 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:03,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:03,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:03,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:03,264 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:03,264 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:03,265 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:03,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:03,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 12:59:03,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:03,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:59:03,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:03,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 12:59:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:03,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:59:03,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:03,418 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2019-09-20 12:59:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:03,491 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-09-20 12:59:03,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:03,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-09-20 12:59:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:03,492 INFO L225 Difference]: With dead ends: 36 [2019-09-20 12:59:03,493 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 12:59:03,493 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 12:59:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 12:59:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 12:59:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 12:59:03,494 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-09-20 12:59:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:03,495 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 12:59:03,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 12:59:03,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 12:59:03,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 12:59:03,570 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-20 12:59:03,570 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-20 12:59:03,570 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-20 12:59:03,570 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-20 12:59:03,570 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-20 12:59:03,571 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-20 12:59:03,571 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-09-20 12:59:03,571 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 33) the Hoare annotation is: true [2019-09-20 12:59:03,571 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 33) no Hoare annotation was computed. [2019-09-20 12:59:03,571 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (= (+ (+ (- (* 2 main_~x~0)) (* main_~y~0 main_~y~0)) main_~y~0) 0) [2019-09-20 12:59:03,571 INFO L443 ceAbstractionStarter]: For program point L21-1(lines 20 29) no Hoare annotation was computed. [2019-09-20 12:59:03,572 INFO L439 ceAbstractionStarter]: At program point L20-2(lines 20 29) the Hoare annotation is: (= (+ (+ (- (* 2 main_~x~0)) (* main_~y~0 main_~y~0)) main_~y~0) 0) [2019-09-20 12:59:03,572 INFO L439 ceAbstractionStarter]: At program point L20-3(lines 20 29) the Hoare annotation is: (= (+ (+ (- (* 2 main_~x~0)) (* main_~y~0 main_~y~0)) main_~y~0) 0) [2019-09-20 12:59:03,572 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 33) no Hoare annotation was computed. [2019-09-20 12:59:03,574 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-09-20 12:59:03,574 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 10) the Hoare annotation is: true [2019-09-20 12:59:03,575 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 10) no Hoare annotation was computed. [2019-09-20 12:59:03,575 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 7) no Hoare annotation was computed. [2019-09-20 12:59:03,575 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 8) no Hoare annotation was computed. [2019-09-20 12:59:03,575 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 10) no Hoare annotation was computed. [2019-09-20 12:59:03,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:59:03 BoogieIcfgContainer [2019-09-20 12:59:03,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 12:59:03,595 INFO L168 Benchmark]: Toolchain (without parser) took 2256.72 ms. Allocated memory was 132.6 MB in the beginning and 224.4 MB in the end (delta: 91.8 MB). Free memory was 86.7 MB in the beginning and 166.7 MB in the end (delta: -80.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-20 12:59:03,597 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 132.6 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 12:59:03,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.99 ms. Allocated memory is still 132.6 MB. Free memory was 86.3 MB in the beginning and 76.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:59:03,601 INFO L168 Benchmark]: Boogie Preprocessor took 120.60 ms. Allocated memory was 132.6 MB in the beginning and 200.3 MB in the end (delta: 67.6 MB). Free memory was 76.9 MB in the beginning and 176.5 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:59:03,609 INFO L168 Benchmark]: RCFGBuilder took 231.63 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 165.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-20 12:59:03,611 INFO L168 Benchmark]: TraceAbstraction took 1662.31 ms. Allocated memory was 200.3 MB in the beginning and 224.4 MB in the end (delta: 24.1 MB). Free memory was 165.2 MB in the beginning and 166.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2019-09-20 12:59:03,617 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 132.6 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.99 ms. Allocated memory is still 132.6 MB. Free memory was 86.3 MB in the beginning and 76.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.60 ms. Allocated memory was 132.6 MB in the beginning and 200.3 MB in the end (delta: 67.6 MB). Free memory was 76.9 MB in the beginning and 176.5 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.63 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 165.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1662.31 ms. Allocated memory was 200.3 MB in the beginning and 224.4 MB in the end (delta: 24.1 MB). Free memory was 165.2 MB in the beginning and 166.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 20]: Loop Invariant Derived loop invariant: -(2 * x) + y * y + y == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 40 SDslu, 203 SDs, 0 SdLazy, 160 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 29 NumberOfFragments, 41 HoareAnnotationTreeSize, 17 FomulaSimplifications, 130 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 92 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 5577 SizeOfPredicates, 11 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 37/52 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...