/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:25,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:25,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:25,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:05:25,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:05:25,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:05:25,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:05:25,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:05:25,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:05:25,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:05:25,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:05:25,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:05:25,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:25,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:25,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:25,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:25,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:25,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:25,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:25,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:25,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:25,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:25,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:25,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:25,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 23:05:25,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 23:05:25,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 23:05:25,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 23:05:25,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 23:05:25,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 23:05:25,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 23:05:25,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 23:05:25,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 23:05:25,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 23:05:25,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 23:05:25,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 23:05:25,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 23:05:25,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 23:05:25,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:25,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:25,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:25,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:05:25,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:25,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:25,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:25,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:25,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:25,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:25,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:25,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:25,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:25,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:25,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:25,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:25,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:25,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:25,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:25,361 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:25,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:25,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:25,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:25,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:25,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:25,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:25,362 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 23:05:25,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:25,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:25,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:25,698 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:25,699 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:25,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-22 23:05:25,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a9c211f/3b0abd6dd0d44059b91162fa8a4725bb/FLAG28d6c9843 [2020-08-22 23:05:26,221 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:26,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-22 23:05:26,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a9c211f/3b0abd6dd0d44059b91162fa8a4725bb/FLAG28d6c9843 [2020-08-22 23:05:26,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a9c211f/3b0abd6dd0d44059b91162fa8a4725bb [2020-08-22 23:05:26,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:26,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:26,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:26,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:26,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:26,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:26,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75abdb36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26, skipping insertion in model container [2020-08-22 23:05:26,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:26,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:26,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:26,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:26,931 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:26,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:26,966 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:26,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26 WrapperNode [2020-08-22 23:05:26,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:26,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:26,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:26,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:26,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:26,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:27,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:27,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:27,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:27,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:27,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:27,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:27,389 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:27,389 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:27,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:27 BoogieIcfgContainer [2020-08-22 23:05:27,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:27,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:27,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:27,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:27,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:26" (1/3) ... [2020-08-22 23:05:27,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d19b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:27, skipping insertion in model container [2020-08-22 23:05:27,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26" (2/3) ... [2020-08-22 23:05:27,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d19b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:27, skipping insertion in model container [2020-08-22 23:05:27,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:27" (3/3) ... [2020-08-22 23:05:27,403 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-08-22 23:05:27,413 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:27,421 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:27,435 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:27,459 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:27,459 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:27,460 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:27,460 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:27,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:27,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:27,462 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:27,462 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 23:05:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 23:05:27,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:27,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:27,488 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-08-22 23:05:27,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:27,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870334134] [2020-08-22 23:05:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:27,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870334134] [2020-08-22 23:05:27,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:27,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:05:27,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473142752] [2020-08-22 23:05:27,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:05:27,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:05:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:27,662 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 23:05:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:27,691 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-08-22 23:05:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:05:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 23:05:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:27,702 INFO L225 Difference]: With dead ends: 42 [2020-08-22 23:05:27,703 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 23:05:27,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 23:05:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 23:05:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 23:05:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 23:05:27,747 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-08-22 23:05:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:27,748 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 23:05:27,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:05:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 23:05:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 23:05:27,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:27,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:27,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:27,750 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash 993822854, now seen corresponding path program 1 times [2020-08-22 23:05:27,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:27,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699248378] [2020-08-22 23:05:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:27,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699248378] [2020-08-22 23:05:27,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:27,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:05:27,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847702686] [2020-08-22 23:05:27,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:05:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:05:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:05:27,876 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-08-22 23:05:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,016 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-22 23:05:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:05:28,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 23:05:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,022 INFO L225 Difference]: With dead ends: 39 [2020-08-22 23:05:28,022 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 23:05:28,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 23:05:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-08-22 23:05:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 23:05:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-22 23:05:28,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-08-22 23:05:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,043 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-22 23:05:28,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:05:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-22 23:05:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 23:05:28,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:28,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1988212296, now seen corresponding path program 1 times [2020-08-22 23:05:28,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345051776] [2020-08-22 23:05:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 23:05:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345051776] [2020-08-22 23:05:28,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:28,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:05:28,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064815302] [2020-08-22 23:05:28,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:28,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:28,133 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-08-22 23:05:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,225 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-08-22 23:05:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:05:28,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 23:05:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,229 INFO L225 Difference]: With dead ends: 54 [2020-08-22 23:05:28,229 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 23:05:28,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 23:05:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-08-22 23:05:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 23:05:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 23:05:28,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-08-22 23:05:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,244 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 23:05:28,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 23:05:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:05:28,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:28,247 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-08-22 23:05:28,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226970283] [2020-08-22 23:05:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226970283] [2020-08-22 23:05:28,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:28,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:05:28,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372666924] [2020-08-22 23:05:28,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:28,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:28,328 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-08-22 23:05:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,396 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-08-22 23:05:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:05:28,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 23:05:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,398 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:05:28,398 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 23:05:28,399 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 [2020-08-22 23:05:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 23:05:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-08-22 23:05:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:05:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 23:05:28,410 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-08-22 23:05:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,410 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 23:05:28,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 23:05:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:05:28,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:28,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1883436929, now seen corresponding path program 1 times [2020-08-22 23:05:28,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200857545] [2020-08-22 23:05:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:05:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200857545] [2020-08-22 23:05:28,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:28,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:05:28,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020619157] [2020-08-22 23:05:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:05:28,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:05:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:28,537 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-08-22 23:05:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,717 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-08-22 23:05:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:05:28,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 23:05:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,719 INFO L225 Difference]: With dead ends: 35 [2020-08-22 23:05:28,720 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 23:05:28,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 23:05:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-22 23:05:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 23:05:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 23:05:28,729 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-08-22 23:05:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,730 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 23:05:28,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:05:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 23:05:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 23:05:28,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,731 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:28,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1649594383, now seen corresponding path program 1 times [2020-08-22 23:05:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228661730] [2020-08-22 23:05:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 23:05:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228661730] [2020-08-22 23:05:28,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:28,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:05:28,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882827812] [2020-08-22 23:05:28,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:28,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:28,809 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 6 states. [2020-08-22 23:05:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,884 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-08-22 23:05:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:05:28,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 23:05:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,886 INFO L225 Difference]: With dead ends: 35 [2020-08-22 23:05:28,886 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:05:28,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:05:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:05:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:05:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:05:28,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 23:05:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,888 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:05:28,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:05:28,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:05:28,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:28,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:05:29,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,377 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:29,377 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:29,378 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:29,378 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:05:29,378 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:05:29,378 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:29,378 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 26) the Hoare annotation is: true [2020-08-22 23:05:29,379 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (<= 0 main_~m~0)) (.cse2 (<= main_~m~0 main_~x~0)) (.cse0 (<= main_~n~0 0))) (or (and .cse0 (<= main_~x~0 0)) (and .cse1 .cse2 (<= (+ main_~m~0 1) main_~n~0)) (and .cse1 .cse2 .cse0))) [2020-08-22 23:05:29,379 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,379 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 23:05:29,379 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= main_~m~0 main_~x~0))) (or (and .cse0 .cse1 (<= (+ main_~m~0 1) main_~n~0)) (and .cse0 .cse1 (<= main_~n~0 0)))) [2020-08-22 23:05:29,380 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse2 (<= main_~m~0 main_~x~0)) (.cse1 (<= main_~n~0 0))) (or (and .cse0 .cse1 (<= main_~x~0 0)) (and .cse0 .cse2 (<= (+ main_~m~0 1) main_~n~0)) (and .cse0 .cse2 .cse1))) [2020-08-22 23:05:29,380 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 26) the Hoare annotation is: true [2020-08-22 23:05:29,380 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-08-22 23:05:29,381 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-08-22 23:05:29,381 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,381 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,381 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 23:05:29,382 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,382 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 23:05:29,382 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 23:05:29,383 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,383 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= main_~m~0 main_~x~0) (<= (+ main_~x~0 1) main_~n~0)) [2020-08-22 23:05:29,383 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:29,383 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:29,384 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:29,384 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:29,384 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:29,385 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:29,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:29 BoogieIcfgContainer [2020-08-22 23:05:29,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:29,434 INFO L168 Benchmark]: Toolchain (without parser) took 2778.93 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 101.6 MB in the beginning and 121.1 MB in the end (delta: -19.5 MB). Peak memory consumption was 75.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,435 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.15 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,437 INFO L168 Benchmark]: Boogie Preprocessor took 147.56 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 92.1 MB in the beginning and 181.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,438 INFO L168 Benchmark]: RCFGBuilder took 277.90 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,439 INFO L168 Benchmark]: TraceAbstraction took 2035.17 ms. Allocated memory was 202.4 MB in the beginning and 232.3 MB in the end (delta: 29.9 MB). Free memory was 167.1 MB in the beginning and 121.1 MB in the end (delta: 46.0 MB). Peak memory consumption was 75.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:29,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.15 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.56 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 92.1 MB in the beginning and 181.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.90 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2035.17 ms. Allocated memory was 202.4 MB in the beginning and 232.3 MB in the end (delta: 29.9 MB). Free memory was 167.1 MB in the beginning and 121.1 MB in the end (delta: 46.0 MB). Peak memory consumption was 75.9 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: 17]: Loop Invariant Derived loop invariant: ((0 <= m && m <= x) && m + 1 <= n) || ((0 <= m && m <= x) && n <= 0) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 81 SDslu, 338 SDs, 0 SdLazy, 137 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 71 PreInvPairs, 111 NumberOfFragments, 236 HoareAnnotationTreeSize, 71 FomulaSimplifications, 411 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 29 FomulaSimplificationsInter, 162 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 5512 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 7/9 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...