/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:48:50,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:48:50,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:48:50,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:48:50,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:48:50,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:48:50,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:48:50,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:48:50,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:48:50,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:48:50,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:48:50,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:48:50,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:48:50,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:48:50,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:48:50,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:48:50,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:48:50,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:48:50,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:48:50,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:48:50,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:48:50,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:48:50,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:48:50,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:48:50,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:48:50,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:48:50,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:48:50,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:48:50,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:48:50,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:48:50,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:48:50,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:48:50,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:48:50,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:48:50,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:48:50,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:48:50,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:48:50,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:48:50,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:48:50,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:48:50,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:48:50,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:48:50,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:48:50,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:48:50,335 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:48:50,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:48:50,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:48:50,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:48:50,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:48:50,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:48:50,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:48:50,336 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:48:50,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:48:50,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:48:50,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:48:50,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:48:50,854 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:48:50,855 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-09-04 17:48:50,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031ad1975/747faac3983b49c0a226ebcc20fc90b4/FLAG304fb6f35 [2020-09-04 17:48:51,525 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:48:51,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_build.i [2020-09-04 17:48:51,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031ad1975/747faac3983b49c0a226ebcc20fc90b4/FLAG304fb6f35 [2020-09-04 17:48:51,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031ad1975/747faac3983b49c0a226ebcc20fc90b4 [2020-09-04 17:48:51,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:48:51,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:48:51,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:48:51,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:48:51,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:48:51,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:48:51" (1/1) ... [2020-09-04 17:48:51,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2641392f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:51, skipping insertion in model container [2020-09-04 17:48:51,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:48:51" (1/1) ... [2020-09-04 17:48:51,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:48:51,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:48:52,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:48:52,166 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:48:52,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:48:52,200 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:48:52,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52 WrapperNode [2020-09-04 17:48:52,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:48:52,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:48:52,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:48:52,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:48:52,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... [2020-09-04 17:48:52,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:48:52,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:48:52,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:48:52,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:48:52,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:48:52,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:48:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:48:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:48:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:48:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:48:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:48:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:48:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:48:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:48:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:48:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:48:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:48:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:48:52,662 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:48:52,663 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 17:48:52,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:48:52 BoogieIcfgContainer [2020-09-04 17:48:52,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:48:52,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:48:52,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:48:52,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:48:52,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:48:51" (1/3) ... [2020-09-04 17:48:52,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a101b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:48:52, skipping insertion in model container [2020-09-04 17:48:52,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:48:52" (2/3) ... [2020-09-04 17:48:52,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a101b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:48:52, skipping insertion in model container [2020-09-04 17:48:52,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:48:52" (3/3) ... [2020-09-04 17:48:52,703 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-09-04 17:48:52,728 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:48:52,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:48:52,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:48:52,798 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:48:52,798 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:48:52,798 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:48:52,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:48:52,798 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:48:52,799 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:48:52,799 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:48:52,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:48:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-04 17:48:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 17:48:52,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:52,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:52,836 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2141903635, now seen corresponding path program 1 times [2020-09-04 17:48:52,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:52,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611263625] [2020-09-04 17:48:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:52,935 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:53,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611263625] [2020-09-04 17:48:53,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:53,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:48:53,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623291959] [2020-09-04 17:48:53,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:48:53,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:53,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:48:53,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:48:53,175 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-09-04 17:48:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,312 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-09-04 17:48:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:48:53,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-04 17:48:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,325 INFO L225 Difference]: With dead ends: 60 [2020-09-04 17:48:53,325 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 17:48:53,329 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 [2020-09-04 17:48:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 17:48:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 17:48:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 17:48:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 17:48:53,380 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 19 [2020-09-04 17:48:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:53,381 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 17:48:53,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:48:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 17:48:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 17:48:53,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:53,383 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] [2020-09-04 17:48:53,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:48:53,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1520201371, now seen corresponding path program 1 times [2020-09-04 17:48:53,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:53,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182917750] [2020-09-04 17:48:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:53,388 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:53,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182917750] [2020-09-04 17:48:53,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:53,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:48:53,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650323789] [2020-09-04 17:48:53,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:48:53,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:53,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:48:53,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:48:53,503 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2020-09-04 17:48:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,593 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-04 17:48:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:48:53,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 17:48:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,598 INFO L225 Difference]: With dead ends: 49 [2020-09-04 17:48:53,598 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 17:48:53,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:48:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 17:48:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-09-04 17:48:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 17:48:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-09-04 17:48:53,623 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 24 [2020-09-04 17:48:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:53,623 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-09-04 17:48:53,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:48:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-09-04 17:48:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 17:48:53,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:53,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:53,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:48:53,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1589830701, now seen corresponding path program 1 times [2020-09-04 17:48:53,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:53,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358997589] [2020-09-04 17:48:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:53,663 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 17:48:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:53,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358997589] [2020-09-04 17:48:53,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:53,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:48:53,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165584968] [2020-09-04 17:48:53,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:48:53,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:53,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:48:53,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:48:53,728 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 3 states. [2020-09-04 17:48:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,755 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-09-04 17:48:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:48:53,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 17:48:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,758 INFO L225 Difference]: With dead ends: 76 [2020-09-04 17:48:53,758 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 17:48:53,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:48:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 17:48:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-09-04 17:48:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:48:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-09-04 17:48:53,776 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-09-04 17:48:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:53,776 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-09-04 17:48:53,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:48:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-09-04 17:48:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 17:48:53,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:53,778 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:53,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:48:53,785 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash 156681780, now seen corresponding path program 1 times [2020-09-04 17:48:53,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:53,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734389941] [2020-09-04 17:48:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:53,795 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 17:48:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 17:48:53,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734389941] [2020-09-04 17:48:53,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:53,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:48:53,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124050307] [2020-09-04 17:48:53,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:48:53,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:48:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:48:53,889 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-09-04 17:48:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,975 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-09-04 17:48:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:48:53,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-09-04 17:48:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,978 INFO L225 Difference]: With dead ends: 89 [2020-09-04 17:48:53,979 INFO L226 Difference]: Without dead ends: 67 [2020-09-04 17:48:53,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:48:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-04 17:48:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-09-04 17:48:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 17:48:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-09-04 17:48:54,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 44 [2020-09-04 17:48:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:54,001 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-09-04 17:48:54,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:48:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-09-04 17:48:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 17:48:54,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:54,004 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:54,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:48:54,004 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1839058219, now seen corresponding path program 2 times [2020-09-04 17:48:54,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:54,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796729804] [2020-09-04 17:48:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:54,017 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 17:48:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 17:48:54,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796729804] [2020-09-04 17:48:54,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:54,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:48:54,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880098767] [2020-09-04 17:48:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:48:54,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:48:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:48:54,178 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 7 states. [2020-09-04 17:48:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:54,287 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-09-04 17:48:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:48:54,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-09-04 17:48:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:54,291 INFO L225 Difference]: With dead ends: 107 [2020-09-04 17:48:54,291 INFO L226 Difference]: Without dead ends: 79 [2020-09-04 17:48:54,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:48:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-04 17:48:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-04 17:48:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 17:48:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-09-04 17:48:54,311 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 58 [2020-09-04 17:48:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:54,312 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-09-04 17:48:54,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:48:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-09-04 17:48:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 17:48:54,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:54,315 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:54,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:48:54,318 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash -101962, now seen corresponding path program 3 times [2020-09-04 17:48:54,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:54,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507004369] [2020-09-04 17:48:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:54,335 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 17:48:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-04 17:48:54,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507004369] [2020-09-04 17:48:54,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:54,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:48:54,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747969078] [2020-09-04 17:48:54,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:48:54,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:48:54,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:48:54,515 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 9 states. [2020-09-04 17:48:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:54,688 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2020-09-04 17:48:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:48:54,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-09-04 17:48:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:54,691 INFO L225 Difference]: With dead ends: 125 [2020-09-04 17:48:54,691 INFO L226 Difference]: Without dead ends: 91 [2020-09-04 17:48:54,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:48:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-04 17:48:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-09-04 17:48:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-04 17:48:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-09-04 17:48:54,710 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 72 [2020-09-04 17:48:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:54,711 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-09-04 17:48:54,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:48:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-09-04 17:48:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 17:48:54,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:54,714 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:54,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:48:54,715 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:54,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:54,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1976659241, now seen corresponding path program 4 times [2020-09-04 17:48:54,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:54,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605709858] [2020-09-04 17:48:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:54,728 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 17:48:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:48:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 17:48:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-04 17:48:54,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605709858] [2020-09-04 17:48:54,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:54,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:48:54,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433244082] [2020-09-04 17:48:54,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:48:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:48:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:48:54,923 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 11 states. [2020-09-04 17:48:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:55,117 INFO L93 Difference]: Finished difference Result 143 states and 175 transitions. [2020-09-04 17:48:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:48:55,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-09-04 17:48:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:55,120 INFO L225 Difference]: With dead ends: 143 [2020-09-04 17:48:55,120 INFO L226 Difference]: Without dead ends: 103 [2020-09-04 17:48:55,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:48:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-04 17:48:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-09-04 17:48:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-04 17:48:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-09-04 17:48:55,140 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 86 [2020-09-04 17:48:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:55,141 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-09-04 17:48:55,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:48:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-09-04 17:48:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 17:48:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:55,143 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:55,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:48:55,144 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:55,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1582933560, now seen corresponding path program 5 times [2020-09-04 17:48:55,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:55,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362357292] [2020-09-04 17:48:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:55,160 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 17:48:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:48:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-04 17:48:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 17:48:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-04 17:48:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 17:48:55,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362357292] [2020-09-04 17:48:55,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:55,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:48:55,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152304897] [2020-09-04 17:48:55,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:48:55,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:55,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:48:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:48:55,458 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 13 states. [2020-09-04 17:48:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:55,712 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2020-09-04 17:48:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:48:55,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2020-09-04 17:48:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:55,716 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:48:55,716 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 17:48:55,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:48:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 17:48:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-09-04 17:48:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-04 17:48:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-09-04 17:48:55,765 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 100 [2020-09-04 17:48:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:55,767 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-09-04 17:48:55,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:48:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-09-04 17:48:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 17:48:55,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:55,777 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:55,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:48:55,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:55,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1615510489, now seen corresponding path program 6 times [2020-09-04 17:48:55,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:55,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542964989] [2020-09-04 17:48:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:55,806 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 17:48:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:48:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-04 17:48:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 17:48:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-04 17:48:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 17:48:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-04 17:48:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-04 17:48:56,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542964989] [2020-09-04 17:48:56,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:56,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:48:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837297288] [2020-09-04 17:48:56,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:48:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:48:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:48:56,118 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 15 states. [2020-09-04 17:48:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:56,443 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-09-04 17:48:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:48:56,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-09-04 17:48:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:56,449 INFO L225 Difference]: With dead ends: 179 [2020-09-04 17:48:56,449 INFO L226 Difference]: Without dead ends: 127 [2020-09-04 17:48:56,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:48:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-04 17:48:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-09-04 17:48:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-04 17:48:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2020-09-04 17:48:56,485 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 114 [2020-09-04 17:48:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:56,487 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2020-09-04 17:48:56,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:48:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2020-09-04 17:48:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-04 17:48:56,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:56,495 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:56,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:48:56,495 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:56,496 INFO L82 PathProgramCache]: Analyzing trace with hash 724624314, now seen corresponding path program 7 times [2020-09-04 17:48:56,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:56,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271125262] [2020-09-04 17:48:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:56,518 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 17:48:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:48:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-04 17:48:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 17:48:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-04 17:48:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 17:48:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-04 17:48:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 17:48:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-04 17:48:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-09-04 17:48:56,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271125262] [2020-09-04 17:48:56,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:56,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 17:48:56,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698029171] [2020-09-04 17:48:56,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 17:48:56,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 17:48:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:48:56,863 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand 17 states. [2020-09-04 17:48:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:57,188 INFO L93 Difference]: Finished difference Result 189 states and 235 transitions. [2020-09-04 17:48:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:48:57,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 128 [2020-09-04 17:48:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:57,190 INFO L225 Difference]: With dead ends: 189 [2020-09-04 17:48:57,191 INFO L226 Difference]: Without dead ends: 131 [2020-09-04 17:48:57,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:48:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-04 17:48:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-09-04 17:48:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-04 17:48:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-09-04 17:48:57,209 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 128 [2020-09-04 17:48:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:57,209 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-09-04 17:48:57,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 17:48:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-09-04 17:48:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-04 17:48:57,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:57,211 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:57,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:48:57,212 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:57,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1386163675, now seen corresponding path program 8 times [2020-09-04 17:48:57,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:57,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481399285] [2020-09-04 17:48:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:57,232 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:48:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:48:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 17:48:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:48:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 17:48:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:48:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 17:48:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:48:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-04 17:48:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 17:48:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-04 17:48:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 17:48:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-04 17:48:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 17:48:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-04 17:48:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-04 17:48:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-04 17:48:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-09-04 17:48:57,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481399285] [2020-09-04 17:48:57,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:57,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:48:57,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089989807] [2020-09-04 17:48:57,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:48:57,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:48:57,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:48:57,393 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 7 states. [2020-09-04 17:48:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:57,475 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2020-09-04 17:48:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:48:57,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-09-04 17:48:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:57,476 INFO L225 Difference]: With dead ends: 133 [2020-09-04 17:48:57,476 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:48:57,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:48:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:48:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:48:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:48:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:48:57,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2020-09-04 17:48:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:57,479 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:48:57,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:48:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:48:57,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:48:57,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:48:57,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:48:57,784 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-09-04 17:48:57,917 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-09-04 17:48:58,199 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-09-04 17:48:58,353 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-09-04 17:48:58,664 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-09-04 17:48:58,860 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-09-04 17:48:59,086 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 12 [2020-09-04 17:48:59,251 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:48:59,266 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:48:59,266 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:48:59,267 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 17:48:59,267 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 17:48:59,267 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:48:59,267 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 23) the Hoare annotation is: true [2020-09-04 17:48:59,267 INFO L264 CegarLoopResult]: At program point L19(lines 17 20) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,267 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,267 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 17:48:59,268 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-09-04 17:48:59,268 INFO L264 CegarLoopResult]: At program point L17-3(line 17) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,268 INFO L264 CegarLoopResult]: At program point L17-4(line 17) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,268 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 23) the Hoare annotation is: true [2020-09-04 17:48:59,268 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 20) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,268 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-09-04 17:48:59,268 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,269 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,269 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-04 17:48:59,269 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 17:48:59,269 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-09-04 17:48:59,269 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,269 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-09-04 17:48:59,269 INFO L264 CegarLoopResult]: At program point L16-4(line 16) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 0 |main_#t~post1|) (< main_~i~0 main_~nlen~0)) [2020-09-04 17:48:59,270 INFO L271 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: true [2020-09-04 17:48:59,270 INFO L264 CegarLoopResult]: At program point L16-5(line 16) the Hoare annotation is: (and (<= 1 main_~i~0) (<= 0 |main_#t~post1|)) [2020-09-04 17:48:59,270 INFO L264 CegarLoopResult]: At program point L16-6(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-09-04 17:48:59,270 INFO L271 CegarLoopResult]: At program point L16-7(lines 16 21) the Hoare annotation is: true [2020-09-04 17:48:59,270 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 17:48:59,270 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))) [2020-09-04 17:48:59,271 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:48:59,271 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))) [2020-09-04 17:48:59,271 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))) [2020-09-04 17:48:59,272 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:48:59,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:48:59 BoogieIcfgContainer [2020-09-04 17:48:59,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:48:59,304 INFO L168 Benchmark]: Toolchain (without parser) took 7414.60 ms. Allocated memory was 146.8 MB in the beginning and 298.8 MB in the end (delta: 152.0 MB). Free memory was 104.4 MB in the beginning and 232.3 MB in the end (delta: -127.9 MB). Peak memory consumption was 139.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:48:59,305 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:48:59,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.22 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:48:59,306 INFO L168 Benchmark]: Boogie Preprocessor took 124.64 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 94.8 MB in the beginning and 183.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:48:59,307 INFO L168 Benchmark]: RCFGBuilder took 343.72 ms. Allocated memory is still 203.4 MB. Free memory was 183.3 MB in the beginning and 168.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:48:59,308 INFO L168 Benchmark]: TraceAbstraction took 6620.63 ms. Allocated memory was 203.4 MB in the beginning and 298.8 MB in the end (delta: 95.4 MB). Free memory was 168.1 MB in the beginning and 232.3 MB in the end (delta: -64.2 MB). Peak memory consumption was 146.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:48:59,311 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.22 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.64 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 94.8 MB in the beginning and 183.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.72 ms. Allocated memory is still 203.4 MB. Free memory was 183.3 MB in the beginning and 168.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6620.63 ms. Allocated memory was 203.4 MB in the beginning and 298.8 MB in the end (delta: 95.4 MB). Free memory was 168.1 MB in the beginning and 232.3 MB in the end (delta: -64.2 MB). Peak memory consumption was 146.6 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 <= i && i < nlen - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 <= i - 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 11, TraceHistogramMax: 18, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 393 SDtfs, 133 SDslu, 1162 SDs, 0 SdLazy, 414 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 58 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 580 PreInvPairs, 756 NumberOfFragments, 144 HoareAnnotationTreeSize, 580 FomulaSimplifications, 21629 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 34 FomulaSimplificationsInter, 10425 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...