/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/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:30:01,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:30:01,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:30:01,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 16:30:01,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:30:01,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:30:01,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:30:01,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:30:01,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:30:01,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:30:01,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:30:01,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:30:01,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:30:01,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:30:01,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:30:01,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:30:01,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:30:01,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:30:01,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:30:01,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:30:01,770 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 16:30:01,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:30:01,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:30:01,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:30:01,787 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:30:01,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:30:01,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:30:01,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:30:01,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:30:01,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:30:01,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:30:01,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:30:01,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:30:01,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:30:01,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:30:01,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:30:01,790 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:30:01,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:30:01,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:30:01,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:30:01,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:30:01,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:30:01,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:30:01,792 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:30:02,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:30:02,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:30:02,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:30:02,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:30:02,293 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:30:02,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-09-04 16:30:02,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f625e56ee/0b0a8af90a1542eb9eacbe1ccaa288f5/FLAG3ae847770 [2020-09-04 16:30:03,037 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:30:03,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-09-04 16:30:03,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f625e56ee/0b0a8af90a1542eb9eacbe1ccaa288f5/FLAG3ae847770 [2020-09-04 16:30:03,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f625e56ee/0b0a8af90a1542eb9eacbe1ccaa288f5 [2020-09-04 16:30:03,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:30:03,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:30:03,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:30:03,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:30:03,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:30:03,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51dbc2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03, skipping insertion in model container [2020-09-04 16:30:03,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:30:03,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:30:03,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:30:03,637 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:30:03,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:30:03,677 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:30:03,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03 WrapperNode [2020-09-04 16:30:03,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:30:03,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:30:03,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:30:03,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:30:03,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (1/1) ... [2020-09-04 16:30:03,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:30:03,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:30:03,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:30:03,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:30:03,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (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 16:30:03,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:30:03,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:30:03,918 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 16:30:03,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:30:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 16:30:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:30:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 16:30:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:30:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:30:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:30:04,121 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:30:04,122 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:30:04,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:30:04 BoogieIcfgContainer [2020-09-04 16:30:04,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:30:04,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:30:04,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:30:04,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:30:04,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:30:03" (1/3) ... [2020-09-04 16:30:04,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae6e6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:30:04, skipping insertion in model container [2020-09-04 16:30:04,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:03" (2/3) ... [2020-09-04 16:30:04,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae6e6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:30:04, skipping insertion in model container [2020-09-04 16:30:04,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:30:04" (3/3) ... [2020-09-04 16:30:04,140 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-09-04 16:30:04,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:30:04,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:30:04,187 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:30:04,218 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:30:04,218 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:30:04,218 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:30:04,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:30:04,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:30:04,219 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:30:04,219 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:30:04,219 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:30:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 16:30:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 16:30:04,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:04,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:04,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-09-04 16:30:04,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:04,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949996309] [2020-09-04 16:30:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:04,346 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:04,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:04,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:04,615 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 16:30:04,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949996309] [2020-09-04 16:30:04,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:04,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:30:04,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083736972] [2020-09-04 16:30:04,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:30:04,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:30:04,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:30:04,692 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-04 16:30:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:04,873 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-04 16:30:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:30:04,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-04 16:30:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:04,892 INFO L225 Difference]: With dead ends: 37 [2020-09-04 16:30:04,892 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 16:30:04,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:30:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 16:30:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 16:30:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 16:30:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-04 16:30:04,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-09-04 16:30:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:04,954 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-04 16:30:04,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:30:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-04 16:30:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 16:30:04,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:04,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:04,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:30:04,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-09-04 16:30:04,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:04,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792580915] [2020-09-04 16:30:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:04,965 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:30:05,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792580915] [2020-09-04 16:30:05,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:05,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:30:05,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007383469] [2020-09-04 16:30:05,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:30:05,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:30:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:30:05,231 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-09-04 16:30:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:05,351 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 16:30:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:30:05,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-04 16:30:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:05,354 INFO L225 Difference]: With dead ends: 31 [2020-09-04 16:30:05,355 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 16:30:05,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:30:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 16:30:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-04 16:30:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 16:30:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-04 16:30:05,384 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-09-04 16:30:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:05,386 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-04 16:30:05,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:30:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-04 16:30:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 16:30:05,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:05,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:05,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:30:05,393 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1416732684, now seen corresponding path program 2 times [2020-09-04 16:30:05,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:05,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776137996] [2020-09-04 16:30:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:05,403 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 16:30:05,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776137996] [2020-09-04 16:30:05,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:05,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:30:05,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480537698] [2020-09-04 16:30:05,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:30:05,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:30:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:30:05,718 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-09-04 16:30:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:05,855 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-09-04 16:30:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:30:05,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-04 16:30:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:05,857 INFO L225 Difference]: With dead ends: 35 [2020-09-04 16:30:05,857 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 16:30:05,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:30:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 16:30:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 16:30:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 16:30:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 16:30:05,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 30 [2020-09-04 16:30:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:05,868 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 16:30:05,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:30:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 16:30:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 16:30:05,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:05,870 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:05,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:30:05,871 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:05,871 INFO L82 PathProgramCache]: Analyzing trace with hash -209476043, now seen corresponding path program 3 times [2020-09-04 16:30:05,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:05,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699378203] [2020-09-04 16:30:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:05,874 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:05,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 16:30:06,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699378203] [2020-09-04 16:30:06,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:06,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 16:30:06,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303931019] [2020-09-04 16:30:06,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 16:30:06,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 16:30:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:30:06,155 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-09-04 16:30:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:06,332 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-09-04 16:30:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 16:30:06,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-04 16:30:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:06,335 INFO L225 Difference]: With dead ends: 39 [2020-09-04 16:30:06,336 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 16:30:06,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:30:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 16:30:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-04 16:30:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 16:30:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-04 16:30:06,356 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 37 [2020-09-04 16:30:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:06,357 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-04 16:30:06,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 16:30:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-04 16:30:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 16:30:06,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:06,362 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:06,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:30:06,363 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1007399302, now seen corresponding path program 4 times [2020-09-04 16:30:06,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:06,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547841037] [2020-09-04 16:30:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:06,367 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 16:30:06,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547841037] [2020-09-04 16:30:06,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:06,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 16:30:06,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659694526] [2020-09-04 16:30:06,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 16:30:06,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 16:30:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-04 16:30:06,673 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-04 16:30:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:06,873 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 16:30:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 16:30:06,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-09-04 16:30:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:06,877 INFO L225 Difference]: With dead ends: 43 [2020-09-04 16:30:06,877 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 16:30:06,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:30:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 16:30:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-04 16:30:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 16:30:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-04 16:30:06,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 44 [2020-09-04 16:30:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:06,896 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-04 16:30:06,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 16:30:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-04 16:30:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 16:30:06,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:06,902 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:06,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:30:06,905 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1787659065, now seen corresponding path program 5 times [2020-09-04 16:30:06,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:06,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934809642] [2020-09-04 16:30:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:06,919 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 16:30:07,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934809642] [2020-09-04 16:30:07,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:07,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:30:07,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289408009] [2020-09-04 16:30:07,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:30:07,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:30:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:30:07,379 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-09-04 16:30:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:07,698 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-09-04 16:30:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:30:07,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-09-04 16:30:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:07,701 INFO L225 Difference]: With dead ends: 47 [2020-09-04 16:30:07,701 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 16:30:07,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-04 16:30:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 16:30:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 16:30:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 16:30:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 16:30:07,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 51 [2020-09-04 16:30:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:07,720 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 16:30:07,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:30:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 16:30:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 16:30:07,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:07,724 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:07,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:30:07,724 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1360883432, now seen corresponding path program 6 times [2020-09-04 16:30:07,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:07,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799632429] [2020-09-04 16:30:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:07,728 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:07,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 16:30:08,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799632429] [2020-09-04 16:30:08,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:08,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:30:08,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217968449] [2020-09-04 16:30:08,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:30:08,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:30:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:30:08,257 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-09-04 16:30:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:08,550 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-09-04 16:30:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 16:30:08,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-04 16:30:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:08,552 INFO L225 Difference]: With dead ends: 51 [2020-09-04 16:30:08,552 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 16:30:08,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-09-04 16:30:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 16:30:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-04 16:30:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 16:30:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-09-04 16:30:08,562 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 58 [2020-09-04 16:30:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:08,563 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-09-04 16:30:08,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:30:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-09-04 16:30:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 16:30:08,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:08,564 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:08,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:30:08,565 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -807968423, now seen corresponding path program 7 times [2020-09-04 16:30:08,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116170937] [2020-09-04 16:30:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:08,568 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 16:30:09,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116170937] [2020-09-04 16:30:09,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:09,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-04 16:30:09,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036761235] [2020-09-04 16:30:09,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 16:30:09,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 16:30:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-04 16:30:09,108 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 19 states. [2020-09-04 16:30:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:09,449 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 16:30:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 16:30:09,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-09-04 16:30:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:09,451 INFO L225 Difference]: With dead ends: 55 [2020-09-04 16:30:09,451 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 16:30:09,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-09-04 16:30:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 16:30:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-04 16:30:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 16:30:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-04 16:30:09,468 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 65 [2020-09-04 16:30:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:09,468 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-04 16:30:09,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 16:30:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-04 16:30:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 16:30:09,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:09,471 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:09,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:30:09,471 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash -705364310, now seen corresponding path program 8 times [2020-09-04 16:30:09,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:09,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272998769] [2020-09-04 16:30:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:09,475 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:09,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,132 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 16:30:10,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272998769] [2020-09-04 16:30:10,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:10,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-04 16:30:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102400685] [2020-09-04 16:30:10,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 16:30:10,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 16:30:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-04 16:30:10,145 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2020-09-04 16:30:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:10,570 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-09-04 16:30:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 16:30:10,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-09-04 16:30:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:10,572 INFO L225 Difference]: With dead ends: 59 [2020-09-04 16:30:10,572 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 16:30:10,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-09-04 16:30:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 16:30:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 16:30:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 16:30:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 16:30:10,584 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 72 [2020-09-04 16:30:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:10,584 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 16:30:10,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 16:30:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 16:30:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:30:10,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:10,589 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:10,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:30:10,589 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439701, now seen corresponding path program 9 times [2020-09-04 16:30:10,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:10,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042837135] [2020-09-04 16:30:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:10,593 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:10,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:30:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 16:30:11,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042837135] [2020-09-04 16:30:11,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:11,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-09-04 16:30:11,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270381339] [2020-09-04 16:30:11,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 16:30:11,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 16:30:11,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-04 16:30:11,427 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 23 states. [2020-09-04 16:30:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:11,923 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-09-04 16:30:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 16:30:11,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2020-09-04 16:30:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:11,925 INFO L225 Difference]: With dead ends: 63 [2020-09-04 16:30:11,925 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 16:30:11,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 16:30:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 16:30:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-04 16:30:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-04 16:30:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-09-04 16:30:11,945 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 79 [2020-09-04 16:30:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:11,947 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-09-04 16:30:11,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 16:30:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-09-04 16:30:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 16:30:11,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:11,950 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:11,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:30:11,953 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash -182126020, now seen corresponding path program 10 times [2020-09-04 16:30:11,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:11,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377534954] [2020-09-04 16:30:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:11,958 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:30:12,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:30:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:30:12,074 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:30:12,102 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:30:12,102 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:30:12,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:30:12,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:30:12 BoogieIcfgContainer [2020-09-04 16:30:12,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:30:12,133 INFO L168 Benchmark]: Toolchain (without parser) took 8767.74 ms. Allocated memory was 137.9 MB in the beginning and 313.5 MB in the end (delta: 175.6 MB). Free memory was 101.9 MB in the beginning and 138.4 MB in the end (delta: -36.6 MB). Peak memory consumption was 139.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,134 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.70 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 92.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,136 INFO L168 Benchmark]: Boogie Preprocessor took 143.77 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,137 INFO L168 Benchmark]: RCFGBuilder took 304.01 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,137 INFO L168 Benchmark]: TraceAbstraction took 8000.81 ms. Allocated memory was 201.9 MB in the beginning and 313.5 MB in the end (delta: 111.7 MB). Free memory was 168.8 MB in the beginning and 138.4 MB in the end (delta: 30.4 MB). Peak memory consumption was 142.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:12,140 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.70 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 92.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.77 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.01 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8000.81 ms. Allocated memory was 201.9 MB in the beginning and 313.5 MB in the end (delta: 111.7 MB). Free memory was 168.8 MB in the beginning and 138.4 MB in the end (delta: 30.4 MB). Peak memory consumption was 142.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 320 SDtfs, 57 SDslu, 3501 SDs, 0 SdLazy, 1432 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 325 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...