/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/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:55:54,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:55:54,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:55:54,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:55:54,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:55:54,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:55:54,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:55:54,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:55:54,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:55:54,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:55:54,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:55:54,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:55:54,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:55:54,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:55:54,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:55:54,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:55:54,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:55:54,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:55:54,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:55:54,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:55:54,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:55:54,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:55:54,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:55:54,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:55:54,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 17:55:54,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 17:55:54,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 17:55:54,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 17:55:54,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 17:55:54,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 17:55:54,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 17:55:54,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 17:55:54,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 17:55:54,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 17:55:54,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 17:55:54,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 17:55:54,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 17:55:54,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 17:55:54,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:55:54,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:55:54,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:55:54,991 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 17:55:55,019 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:55:55,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:55:55,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:55:55,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:55:55,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:55:55,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:55:55,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:55:55,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:55:55,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:55:55,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:55:55,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:55:55,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:55:55,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:55:55,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:55:55,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:55:55,032 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:55:55,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:55:55,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:55:55,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:55:55,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:55:55,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:55:55,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:55:55,034 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:55:55,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:55:55,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:55:55,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:55:55,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:55:55,715 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:55:55,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-04 17:55:55,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/475dfb316/40ad3862c2ea4d31860a5966f6a86f57/FLAG8b032b95f [2020-09-04 17:55:56,807 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:55:56,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-04 17:55:56,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/475dfb316/40ad3862c2ea4d31860a5966f6a86f57/FLAG8b032b95f [2020-09-04 17:55:57,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/475dfb316/40ad3862c2ea4d31860a5966f6a86f57 [2020-09-04 17:55:57,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:55:57,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:55:57,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:55:57,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:55:57,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:55:57,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2283f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57, skipping insertion in model container [2020-09-04 17:55:57,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:55:57,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:55:57,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:55:57,493 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:55:57,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:55:57,556 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:55:57,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57 WrapperNode [2020-09-04 17:55:57,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:55:57,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:55:57,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:55:57,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:55:57,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (1/1) ... [2020-09-04 17:55:57,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:55:57,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:55:57,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:55:57,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:55:57,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (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 17:55:57,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:55:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:55:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:55:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:55:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:55:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:55:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:55:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:55:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:55:58,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:55:58,287 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-04 17:55:58,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:55:58 BoogieIcfgContainer [2020-09-04 17:55:58,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:55:58,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:55:58,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:55:58,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:55:58,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:55:57" (1/3) ... [2020-09-04 17:55:58,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb15fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:55:58, skipping insertion in model container [2020-09-04 17:55:58,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:55:57" (2/3) ... [2020-09-04 17:55:58,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb15fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:55:58, skipping insertion in model container [2020-09-04 17:55:58,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:55:58" (3/3) ... [2020-09-04 17:55:58,322 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-09-04 17:55:58,357 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:55:58,401 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:55:58,484 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:55:58,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:55:58,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:55:58,531 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:55:58,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:55:58,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:55:58,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:55:58,532 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:55:58,532 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:55:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-09-04 17:55:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 17:55:58,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:55:58,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:55:58,581 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:55:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:55:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1562147583, now seen corresponding path program 1 times [2020-09-04 17:55:58,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:55:58,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606945047] [2020-09-04 17:55:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:55:58,713 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:55:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:58,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:55:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,017 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 17:55:59,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606945047] [2020-09-04 17:55:59,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:59,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:55:59,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907851076] [2020-09-04 17:55:59,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:55:59,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:55:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:55:59,079 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-09-04 17:55:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:55:59,267 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-09-04 17:55:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:55:59,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-04 17:55:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:55:59,292 INFO L225 Difference]: With dead ends: 105 [2020-09-04 17:55:59,293 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 17:55:59,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:55:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 17:55:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-09-04 17:55:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 17:55:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-04 17:55:59,388 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2020-09-04 17:55:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:55:59,389 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-04 17:55:59,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:55:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-04 17:55:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:55:59,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:55:59,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:55:59,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:55:59,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:55:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:55:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 42061886, now seen corresponding path program 1 times [2020-09-04 17:55:59,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:55:59,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11796683] [2020-09-04 17:55:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:55:59,457 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:55:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:55:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,667 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 17:55:59,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11796683] [2020-09-04 17:55:59,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:59,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:55:59,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608489953] [2020-09-04 17:55:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:55:59,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:55:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:55:59,675 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-04 17:55:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:55:59,823 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-09-04 17:55:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:55:59,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-04 17:55:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:55:59,828 INFO L225 Difference]: With dead ends: 97 [2020-09-04 17:55:59,828 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 17:55:59,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:55:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 17:55:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2020-09-04 17:55:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 17:55:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-04 17:55:59,853 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 27 [2020-09-04 17:55:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:55:59,854 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-04 17:55:59,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:55:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-04 17:55:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 17:55:59,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:55:59,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:55:59,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:55:59,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:55:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:55:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2023869189, now seen corresponding path program 2 times [2020-09-04 17:55:59,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:55:59,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957809848] [2020-09-04 17:55:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:55:59,869 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:55:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,110 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 17:56:00,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957809848] [2020-09-04 17:56:00,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:00,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:56:00,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88736510] [2020-09-04 17:56:00,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:56:00,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:00,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:56:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:56:00,116 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-09-04 17:56:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:00,352 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-09-04 17:56:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:56:00,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-04 17:56:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:00,355 INFO L225 Difference]: With dead ends: 105 [2020-09-04 17:56:00,355 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 17:56:00,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:56:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 17:56:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-09-04 17:56:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 17:56:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-04 17:56:00,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2020-09-04 17:56:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:00,409 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-04 17:56:00,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:56:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-04 17:56:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:56:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:00,412 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:00,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:56:00,413 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash -909118664, now seen corresponding path program 3 times [2020-09-04 17:56:00,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:00,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4695869] [2020-09-04 17:56:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:00,424 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,657 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 17:56:00,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4695869] [2020-09-04 17:56:00,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:00,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:56:00,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220589220] [2020-09-04 17:56:00,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:56:00,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:56:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:56:00,660 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-04 17:56:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:00,865 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-09-04 17:56:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:56:00,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-04 17:56:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:00,868 INFO L225 Difference]: With dead ends: 113 [2020-09-04 17:56:00,869 INFO L226 Difference]: Without dead ends: 73 [2020-09-04 17:56:00,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:56:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-04 17:56:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-04 17:56:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 17:56:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-09-04 17:56:00,884 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2020-09-04 17:56:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:00,885 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-09-04 17:56:00,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:56:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-09-04 17:56:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 17:56:00,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:00,888 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:00,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:56:00,890 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -460436747, now seen corresponding path program 4 times [2020-09-04 17:56:00,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:00,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510078341] [2020-09-04 17:56:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:00,899 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:01,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:01,135 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 17:56:01,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510078341] [2020-09-04 17:56:01,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:01,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:56:01,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880098767] [2020-09-04 17:56:01,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:56:01,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:56:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:56:01,138 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-09-04 17:56:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:01,504 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-09-04 17:56:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:56:01,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-04 17:56:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:01,508 INFO L225 Difference]: With dead ends: 121 [2020-09-04 17:56:01,508 INFO L226 Difference]: Without dead ends: 77 [2020-09-04 17:56:01,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:56:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-04 17:56:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-09-04 17:56:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-04 17:56:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-09-04 17:56:01,528 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 39 [2020-09-04 17:56:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:01,529 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-09-04 17:56:01,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:56:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-09-04 17:56:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 17:56:01,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:01,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:56:01,533 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1152416818, now seen corresponding path program 5 times [2020-09-04 17:56:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:01,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230975055] [2020-09-04 17:56:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:01,548 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:02,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:02,122 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 17:56:02,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230975055] [2020-09-04 17:56:02,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:02,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:56:02,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067171104] [2020-09-04 17:56:02,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:56:02,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:56:02,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:56:02,134 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 13 states. [2020-09-04 17:56:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:02,635 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-09-04 17:56:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:56:02,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-09-04 17:56:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:02,639 INFO L225 Difference]: With dead ends: 129 [2020-09-04 17:56:02,639 INFO L226 Difference]: Without dead ends: 81 [2020-09-04 17:56:02,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:56:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-04 17:56:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-04 17:56:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 17:56:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-04 17:56:02,655 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2020-09-04 17:56:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:02,656 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-04 17:56:02,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:56:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-04 17:56:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 17:56:02,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:02,658 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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 17:56:02,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:56:02,659 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2041431791, now seen corresponding path program 6 times [2020-09-04 17:56:02,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:02,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179389976] [2020-09-04 17:56:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:02,669 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:03,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:03,151 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 17:56:03,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179389976] [2020-09-04 17:56:03,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:03,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:56:03,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636690458] [2020-09-04 17:56:03,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:56:03,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:56:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:56:03,164 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-09-04 17:56:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:03,900 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-09-04 17:56:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:56:03,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-09-04 17:56:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:03,907 INFO L225 Difference]: With dead ends: 137 [2020-09-04 17:56:03,908 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 17:56:03,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:56:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 17:56:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-09-04 17:56:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 17:56:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-09-04 17:56:03,950 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 47 [2020-09-04 17:56:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:03,954 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-09-04 17:56:03,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:56:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-09-04 17:56:03,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 17:56:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:03,967 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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 17:56:03,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:56:03,968 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 90008364, now seen corresponding path program 7 times [2020-09-04 17:56:03,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:03,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804537793] [2020-09-04 17:56:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:03,979 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:04,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:04,430 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 17:56:04,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804537793] [2020-09-04 17:56:04,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:04,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 17:56:04,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155002576] [2020-09-04 17:56:04,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 17:56:04,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 17:56:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:56:04,437 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 17 states. [2020-09-04 17:56:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:05,269 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2020-09-04 17:56:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:56:05,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-09-04 17:56:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:05,276 INFO L225 Difference]: With dead ends: 145 [2020-09-04 17:56:05,277 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 17:56:05,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:56:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 17:56:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2020-09-04 17:56:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 17:56:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-09-04 17:56:05,314 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 51 [2020-09-04 17:56:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:05,314 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-09-04 17:56:05,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 17:56:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-09-04 17:56:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 17:56:05,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:05,317 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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 17:56:05,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:56:05,318 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash 737585385, now seen corresponding path program 8 times [2020-09-04 17:56:05,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:05,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784562300] [2020-09-04 17:56:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:05,327 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:05,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:05,791 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 17:56:05,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784562300] [2020-09-04 17:56:05,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:05,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-04 17:56:05,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155230136] [2020-09-04 17:56:05,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 17:56:05,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 17:56:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:56:05,796 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 19 states. [2020-09-04 17:56:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:06,802 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-09-04 17:56:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 17:56:06,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-09-04 17:56:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:06,805 INFO L225 Difference]: With dead ends: 153 [2020-09-04 17:56:06,806 INFO L226 Difference]: Without dead ends: 93 [2020-09-04 17:56:06,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 17:56:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-04 17:56:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-04 17:56:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 17:56:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-09-04 17:56:06,822 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2020-09-04 17:56:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:06,822 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-09-04 17:56:06,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 17:56:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-09-04 17:56:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 17:56:06,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:06,824 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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 17:56:06,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:56:06,825 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1005535194, now seen corresponding path program 9 times [2020-09-04 17:56:06,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:06,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331183272] [2020-09-04 17:56:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:06,834 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:07,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:07,464 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 17:56:07,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331183272] [2020-09-04 17:56:07,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:07,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-04 17:56:07,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327378973] [2020-09-04 17:56:07,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 17:56:07,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 17:56:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-04 17:56:07,472 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 21 states. [2020-09-04 17:56:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:08,598 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2020-09-04 17:56:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 17:56:08,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-09-04 17:56:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:08,601 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:56:08,601 INFO L226 Difference]: Without dead ends: 97 [2020-09-04 17:56:08,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 17:56:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-04 17:56:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2020-09-04 17:56:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 17:56:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-09-04 17:56:08,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 59 [2020-09-04 17:56:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:08,618 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-09-04 17:56:08,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 17:56:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-09-04 17:56:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 17:56:08,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:08,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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 17:56:08,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:56:08,621 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 111341795, now seen corresponding path program 10 times [2020-09-04 17:56:08,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:08,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303587357] [2020-09-04 17:56:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:08,634 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:09,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:09,402 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 17:56:09,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303587357] [2020-09-04 17:56:09,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:09,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-09-04 17:56:09,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989686712] [2020-09-04 17:56:09,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 17:56:09,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 17:56:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:56:09,408 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 25 states. [2020-09-04 17:56:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:10,843 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2020-09-04 17:56:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 17:56:10,844 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-09-04 17:56:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:10,845 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:56:10,845 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:56:10,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 17:56:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:56:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:56:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:56:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:56:10,847 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2020-09-04 17:56:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:10,848 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:56:10,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 17:56:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:56:10,848 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:56:10,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:56:10,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:56:11,479 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2020-09-04 17:56:11,712 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-09-04 17:56:11,818 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-09-04 17:56:11,934 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,934 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,934 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,935 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,935 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,935 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:56:11,935 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 10 25) the Hoare annotation is: true [2020-09-04 17:56:11,935 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,936 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,936 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 17:56:11,936 INFO L264 CegarLoopResult]: At program point L19-4(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,937 INFO L264 CegarLoopResult]: At program point L19-5(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,937 INFO L264 CegarLoopResult]: At program point L19-6(lines 19 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,937 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,938 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-09-04 17:56:11,938 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-04 17:56:11,938 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-09-04 17:56:11,938 INFO L264 CegarLoopResult]: At program point L20-5(lines 20 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,938 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,939 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (or (and (<= 3 main_~v~0) (<= main_~v~0 3)) (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= main_~v~0 7) (<= 7 main_~v~0)) (and (<= main_~v~0 8) (<= 8 main_~v~0)) (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= 2 main_~v~0) (<= main_~v~0 2)) (and (<= 4 main_~v~0) (<= main_~v~0 4)) (and (<= main_~v~0 1) (<= 1 main_~v~0)) (and (<= main_~v~0 5) (<= 5 main_~v~0)) (and (<= 6 main_~v~0) (<= main_~v~0 6))) [2020-09-04 17:56:11,939 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (< 0 (+ (div main_~v~0 4294967296) 1)) (<= main_~v~0 0)) [2020-09-04 17:56:11,939 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (or (and (<= 4 |main_#t~post4|) (<= 4 main_~v~0) (<= |main_#t~post4| 4) (<= main_~v~0 4)) (and (<= |main_#t~post4| 6) (<= 6 main_~v~0) (<= 6 |main_#t~post4|) (<= main_~v~0 6)) (and (<= main_~v~0 7) (<= |main_#t~post4| 7) (<= 7 |main_#t~post4|) (<= 7 main_~v~0)) (and (<= 2 main_~v~0) (<= main_~v~0 2) (<= |main_#t~post4| 2) (<= 2 |main_#t~post4|)) (and (<= main_~v~0 8) (<= 8 main_~v~0) (<= 8 |main_#t~post4|) (<= |main_#t~post4| 8)) (and (<= main_~v~0 1) (<= 1 main_~v~0) (<= |main_#t~post4| 1) (<= 1 |main_#t~post4|)) (and (<= 5 |main_#t~post4|) (<= main_~v~0 5) (<= 5 main_~v~0) (<= |main_#t~post4| 5)) (and (<= |main_#t~post4| 0) (<= 0 |main_#t~post4|) (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= 3 main_~v~0) (<= main_~v~0 3) (<= 3 |main_#t~post4|) (<= |main_#t~post4| 3)) (and (<= 9 |main_#t~post4|) (<= |main_#t~post4| 9) (<= main_~v~0 9) (<= 9 main_~v~0))) [2020-09-04 17:56:11,940 INFO L264 CegarLoopResult]: At program point L21-5(line 21) the Hoare annotation is: (or (and (<= 8 |main_#t~post4|) (<= |main_#t~post4| 8) (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= 2 main_~v~0) (<= |main_#t~post4| 1) (<= main_~v~0 2) (<= 1 |main_#t~post4|)) (and (<= 3 main_~v~0) (<= main_~v~0 3) (<= |main_#t~post4| 2) (<= 2 |main_#t~post4|)) (and (<= 4 main_~v~0) (<= 3 |main_#t~post4|) (<= |main_#t~post4| 3) (<= main_~v~0 4)) (and (<= 5 |main_#t~post4|) (<= 6 main_~v~0) (<= |main_#t~post4| 5) (<= main_~v~0 6)) (and (<= main_~v~0 5) (<= 4 |main_#t~post4|) (<= 5 main_~v~0) (<= |main_#t~post4| 4)) (and (<= main_~v~0 1) (<= |main_#t~post4| 0) (<= 0 |main_#t~post4|) (<= 1 main_~v~0)) (and (<= |main_#t~post4| 6) (<= main_~v~0 7) (<= 6 |main_#t~post4|) (<= 7 main_~v~0)) (and (<= main_~v~0 8) (<= 8 main_~v~0) (<= |main_#t~post4| 7) (<= 7 |main_#t~post4|)) (and (<= 9 |main_#t~post4|) (<= |main_#t~post4| 9) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2))) [2020-09-04 17:56:11,940 INFO L264 CegarLoopResult]: At program point L21-6(line 21) the Hoare annotation is: (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= main_~v~0 8) (< 0 (+ (div main_~v~0 4294967296) 1)))) [2020-09-04 17:56:11,940 INFO L264 CegarLoopResult]: At program point L21-7(line 21) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-09-04 17:56:11,940 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,940 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-09-04 17:56:11,940 INFO L264 CegarLoopResult]: At program point L17-4(line 17) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,940 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 10 25) the Hoare annotation is: true [2020-09-04 17:56:11,941 INFO L264 CegarLoopResult]: At program point L17-5(line 17) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,941 INFO L264 CegarLoopResult]: At program point L17-6(lines 17 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,941 INFO L271 CegarLoopResult]: At program point L17-7(lines 17 23) the Hoare annotation is: true [2020-09-04 17:56:11,941 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-09-04 17:56:11,941 INFO L264 CegarLoopResult]: At program point L22(lines 20 23) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-09-04 17:56:11,941 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,941 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,942 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 17:56:11,942 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,942 INFO L264 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,942 INFO L264 CegarLoopResult]: At program point L18-6(lines 18 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-09-04 17:56:11,943 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-04 17:56:11,943 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-09-04 17:56:11,943 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2020-09-04 17:56:11,943 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-09-04 17:56:11,944 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2020-09-04 17:56:11,944 INFO L264 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-09-04 17:56:11,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:56:11 BoogieIcfgContainer [2020-09-04 17:56:11,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:56:11,984 INFO L168 Benchmark]: Toolchain (without parser) took 14913.94 ms. Allocated memory was 141.6 MB in the beginning and 310.9 MB in the end (delta: 169.3 MB). Free memory was 106.5 MB in the beginning and 195.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 154.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:56:11,985 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 141.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:56:11,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.27 ms. Allocated memory is still 141.6 MB. Free memory was 106.3 MB in the beginning and 96.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:56:11,987 INFO L168 Benchmark]: Boogie Preprocessor took 186.08 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 96.7 MB in the beginning and 184.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:56:11,987 INFO L168 Benchmark]: RCFGBuilder took 550.61 ms. Allocated memory is still 205.0 MB. Free memory was 184.9 MB in the beginning and 169.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:56:11,988 INFO L168 Benchmark]: TraceAbstraction took 13682.63 ms. Allocated memory was 205.0 MB in the beginning and 310.9 MB in the end (delta: 105.9 MB). Free memory was 169.2 MB in the beginning and 195.1 MB in the end (delta: -25.8 MB). Peak memory consumption was 153.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:56:11,992 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 141.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 484.27 ms. Allocated memory is still 141.6 MB. Free memory was 106.3 MB in the beginning and 96.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 186.08 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 96.7 MB in the beginning and 184.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 550.61 ms. Allocated memory is still 205.0 MB. Free memory was 184.9 MB in the beginning and 169.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13682.63 ms. Allocated memory was 205.0 MB in the beginning and 310.9 MB in the end (delta: 105.9 MB). Free memory was 169.2 MB in the beginning and 195.1 MB in the end (delta: -25.8 MB). Peak memory consumption was 153.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || (10 <= v && v / 4 <= 2)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - ProcedureContractResult [Line: 10]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (cond + 2 <= 0 || (!(2 <= \old(cond)) && !(\old(cond) + 2 <= 0))) || 2 <= cond - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.3s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 527 SDtfs, 496 SDslu, 4924 SDs, 0 SdLazy, 2941 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred 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, 190 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 46 LocationsWithAnnotation, 112 PreInvPairs, 201 NumberOfFragments, 796 HoareAnnotationTreeSize, 112 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 46 FomulaSimplificationsInter, 240 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...