/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:27:08,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:27:08,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:27:08,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:27:08,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:27:08,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:27:08,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:27:08,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:27:08,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:27:08,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:27:08,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:27:08,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:27:08,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:27:08,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:27:08,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:27:08,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:27:08,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:27:08,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:27:08,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:27:08,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:27:08,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:27:08,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:27:08,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:27:08,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:27:08,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:27:08,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:27:08,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:27:08,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:27:08,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:27:08,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:27:08,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:27:08,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:27:08,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:27:08,422 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:27:08,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:27:08,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:27:08,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:27:08,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:27:08,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:27:08,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:27:08,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:27:08,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:27:08,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:27:08,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:27:08,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:27:08,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:27:08,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:27:08,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:27:08,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:27:08,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:27:08,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:27:08,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:27:08,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:27:08,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:27:08,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:27:08,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:27:08,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:27:08,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:27:08,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:27:08,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:27:08,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:27:08,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:27:08,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:27:08,723 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:27:08,724 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-21 13:27:08,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74e5aac3/33a374dc73fb49009d4a7f732f76ea97/FLAGa73977cdc [2020-08-21 13:27:09,224 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:27:09,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-21 13:27:09,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74e5aac3/33a374dc73fb49009d4a7f732f76ea97/FLAGa73977cdc [2020-08-21 13:27:09,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74e5aac3/33a374dc73fb49009d4a7f732f76ea97 [2020-08-21 13:27:09,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:27:09,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:27:09,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:27:09,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:27:09,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:27:09,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:09,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1190dd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09, skipping insertion in model container [2020-08-21 13:27:09,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:09,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:27:09,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:27:09,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:27:09,908 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:27:09,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:27:09,939 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:27:09,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09 WrapperNode [2020-08-21 13:27:09,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:27:09,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:27:09,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:27:09,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:27:09,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:09,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (1/1) ... [2020-08-21 13:27:10,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:27:10,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:27:10,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:27:10,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:27:10,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (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 [2020-08-21 13:27:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:27:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:27:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:27:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:27:10,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:27:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:27:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:27:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:27:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:27:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:27:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:27:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:27:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:27:10,301 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:27:10,301 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:27:10,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:27:10 BoogieIcfgContainer [2020-08-21 13:27:10,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:27:10,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:27:10,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:27:10,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:27:10,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:27:09" (1/3) ... [2020-08-21 13:27:10,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fd318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:27:10, skipping insertion in model container [2020-08-21 13:27:10,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:09" (2/3) ... [2020-08-21 13:27:10,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fd318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:27:10, skipping insertion in model container [2020-08-21 13:27:10,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:27:10" (3/3) ... [2020-08-21 13:27:10,335 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-08-21 13:27:10,364 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:27:10,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:27:10,409 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:27:10,430 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:27:10,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:27:10,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:27:10,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:27:10,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:27:10,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:27:10,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:27:10,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:27:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 13:27:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 13:27:10,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:10,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:10,451 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-08-21 13:27:10,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:10,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325169019] [2020-08-21 13:27:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:10,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325169019] [2020-08-21 13:27:10,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:27:10,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:27:10,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651554806] [2020-08-21 13:27:10,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:27:10,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:27:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:27:10,616 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-08-21 13:27:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:10,645 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-08-21 13:27:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:27:10,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-21 13:27:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:10,654 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:27:10,655 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 13:27:10,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:27:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 13:27:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 13:27:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 13:27:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-21 13:27:10,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-21 13:27:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:10,698 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-21 13:27:10,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:27:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-21 13:27:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 13:27:10,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:10,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:10,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:27:10,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:10,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-08-21 13:27:10,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:10,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165016065] [2020-08-21 13:27:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:10,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:10,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165016065] [2020-08-21 13:27:10,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:10,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:27:10,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39419746] [2020-08-21 13:27:10,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:27:10,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:27:10,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:27:10,834 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-08-21 13:27:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:10,899 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-21 13:27:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:27:10,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 13:27:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:10,901 INFO L225 Difference]: With dead ends: 19 [2020-08-21 13:27:10,901 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 13:27:10,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:27:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 13:27:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 13:27:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 13:27:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-21 13:27:10,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-21 13:27:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:10,908 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-21 13:27:10,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:27:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-21 13:27:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:27:10,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:10,910 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:10,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:27:10,910 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-08-21 13:27:10,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:10,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147223069] [2020-08-21 13:27:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:11,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147223069] [2020-08-21 13:27:11,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:11,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:27:11,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331506724] [2020-08-21 13:27:11,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:27:11,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:27:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:27:11,023 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-08-21 13:27:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:11,095 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-21 13:27:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:27:11,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-21 13:27:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:11,096 INFO L225 Difference]: With dead ends: 20 [2020-08-21 13:27:11,097 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 13:27:11,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:27:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 13:27:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 13:27:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 13:27:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-21 13:27:11,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-21 13:27:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:11,102 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-21 13:27:11,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:27:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-21 13:27:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:27:11,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:11,103 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:11,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:27:11,104 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 3 times [2020-08-21 13:27:11,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:11,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277797446] [2020-08-21 13:27:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:11,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277797446] [2020-08-21 13:27:11,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:11,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:27:11,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435942586] [2020-08-21 13:27:11,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:27:11,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:27:11,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:27:11,205 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-08-21 13:27:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:11,283 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-21 13:27:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:27:11,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 13:27:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:11,285 INFO L225 Difference]: With dead ends: 21 [2020-08-21 13:27:11,285 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 13:27:11,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:27:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 13:27:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 13:27:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 13:27:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-21 13:27:11,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-21 13:27:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:11,291 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-21 13:27:11,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:27:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-21 13:27:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 13:27:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:11,293 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:27:11,293 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2019132945, now seen corresponding path program 4 times [2020-08-21 13:27:11,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:11,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550059944] [2020-08-21 13:27:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:11,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550059944] [2020-08-21 13:27:11,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:11,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:27:11,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124389439] [2020-08-21 13:27:11,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:27:11,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:11,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:27:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:27:11,420 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-08-21 13:27:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:11,497 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-21 13:27:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:27:11,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-08-21 13:27:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:11,499 INFO L225 Difference]: With dead ends: 22 [2020-08-21 13:27:11,499 INFO L226 Difference]: Without dead ends: 17 [2020-08-21 13:27:11,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:27:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-21 13:27:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-21 13:27:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-21 13:27:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-21 13:27:11,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-08-21 13:27:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:11,505 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-21 13:27:11,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:27:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-21 13:27:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:27:11,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:11,506 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:11,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:27:11,506 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 5 times [2020-08-21 13:27:11,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:11,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890452970] [2020-08-21 13:27:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:11,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890452970] [2020-08-21 13:27:11,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:11,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:27:11,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784349323] [2020-08-21 13:27:11,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:27:11,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:27:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:27:11,659 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-08-21 13:27:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:11,744 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-08-21 13:27:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:27:11,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-08-21 13:27:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:11,746 INFO L225 Difference]: With dead ends: 23 [2020-08-21 13:27:11,746 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:27:11,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:27:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:27:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:27:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:27:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-21 13:27:11,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-08-21 13:27:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:11,752 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-21 13:27:11,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:27:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-21 13:27:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 13:27:11,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:11,753 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:11,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:27:11,753 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:11,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2075665807, now seen corresponding path program 6 times [2020-08-21 13:27:11,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:11,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597822636] [2020-08-21 13:27:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 13:27:11,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597822636] [2020-08-21 13:27:11,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:27:11,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:27:11,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994109843] [2020-08-21 13:27:11,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:27:11,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:27:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:27:11,806 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-21 13:27:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:11,834 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-21 13:27:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:27:11,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-21 13:27:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:11,835 INFO L225 Difference]: With dead ends: 18 [2020-08-21 13:27:11,835 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:27:11,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:27:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:27:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:27:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:27:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:27:11,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-08-21 13:27:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:11,837 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:27:11,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:27:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:27:11,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:27:11,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:27:11,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:27:11,913 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:27:11,914 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:27:11,914 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:27:11,914 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:27:11,914 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:27:11,914 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:27:11,914 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:27:11,915 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 13:27:11,915 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:27:11,915 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:27:11,915 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-08-21 13:27:11,915 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-08-21 13:27:11,915 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 13:27:11,916 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 13:27:11,916 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2020-08-21 13:27:11,916 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 13 main_~y~0) (<= (+ main_~x~0 65) (* 5 main_~y~0))) (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0))) [2020-08-21 13:27:11,916 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-08-21 13:27:11,916 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 13:27:11,917 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:27:11,918 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 13:27:11,918 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 13:27:11,919 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:27:11,919 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 13:27:11,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:27:11 BoogieIcfgContainer [2020-08-21 13:27:11,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:27:11,948 INFO L168 Benchmark]: Toolchain (without parser) took 2276.74 ms. Allocated memory was 148.9 MB in the beginning and 232.8 MB in the end (delta: 83.9 MB). Free memory was 105.2 MB in the beginning and 131.2 MB in the end (delta: -26.0 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,953 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.01 ms. Allocated memory is still 148.9 MB. Free memory was 105.0 MB in the beginning and 95.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,956 INFO L168 Benchmark]: Boogie Preprocessor took 114.47 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 184.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,957 INFO L168 Benchmark]: RCFGBuilder took 252.63 ms. Allocated memory is still 205.0 MB. Free memory was 183.4 MB in the beginning and 171.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,958 INFO L168 Benchmark]: TraceAbstraction took 1634.02 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.5 MB in the beginning and 131.2 MB in the end (delta: 39.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:11,971 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.01 ms. Allocated memory is still 148.9 MB. Free memory was 105.0 MB in the beginning and 95.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.47 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 184.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.63 ms. Allocated memory is still 205.0 MB. Free memory was 183.4 MB in the beginning and 171.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1634.02 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.5 MB in the beginning and 131.2 MB in the end (delta: 39.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 18]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 14 SDslu, 300 SDs, 0 SdLazy, 298 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 25 NumberOfFragments, 37 HoareAnnotationTreeSize, 13 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/56 InterpolantCoveringCapability, 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...