/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:10:41,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:10:41,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:10:41,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:10:41,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:10:42,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:10:42,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:10:42,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:10:42,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:10:42,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:10:42,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:10:42,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:10:42,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:10:42,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:10:42,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:10:42,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:10:42,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:10:42,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:10:42,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:10:42,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:10:42,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:10:42,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:10:42,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:10:42,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:10:42,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:10:42,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:10:42,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:10:42,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:10:42,072 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:10:42,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:10:42,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:10:42,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:10:42,098 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:10:42,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:10:42,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:10:42,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:10:42,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:10:42,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:10:42,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:10:42,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:10:42,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:10:42,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:10:42,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:10:42,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:10:42,102 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:10:42,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:10:42,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:10:42,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:10:42,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:10:42,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:10:42,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:10:42,104 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:10:42,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:10:42,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:10:42,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:10:42,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:10:42,481 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:10:42,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-08-22 22:10:42,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3172af21a/2c5a32582c5141c5b66696fce93eb6bd/FLAG68b6300f2 [2020-08-22 22:10:43,176 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:10:43,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-08-22 22:10:43,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3172af21a/2c5a32582c5141c5b66696fce93eb6bd/FLAG68b6300f2 [2020-08-22 22:10:43,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3172af21a/2c5a32582c5141c5b66696fce93eb6bd [2020-08-22 22:10:43,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:10:43,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:10:43,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:43,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:10:43,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:10:43,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c8aa76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43, skipping insertion in model container [2020-08-22 22:10:43,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:10:43,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:10:43,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:43,764 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:10:43,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:43,798 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:10:43,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43 WrapperNode [2020-08-22 22:10:43,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:43,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:10:43,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:10:43,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:10:43,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... [2020-08-22 22:10:43,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:10:43,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:10:43,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:10:43,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:10:43,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:10:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:10:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:10:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:10:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:10:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:10:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:10:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:10:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:10:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:10:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:10:44,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:10:44,262 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:10:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:44 BoogieIcfgContainer [2020-08-22 22:10:44,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:10:44,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:10:44,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:10:44,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:10:44,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:10:43" (1/3) ... [2020-08-22 22:10:44,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca1baf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:44, skipping insertion in model container [2020-08-22 22:10:44,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:43" (2/3) ... [2020-08-22 22:10:44,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca1baf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:44, skipping insertion in model container [2020-08-22 22:10:44,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:44" (3/3) ... [2020-08-22 22:10:44,283 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-08-22 22:10:44,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:10:44,313 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:10:44,331 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:10:44,367 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:10:44,368 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:10:44,368 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:10:44,368 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:10:44,369 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:10:44,369 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:10:44,370 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:10:44,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:10:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-22 22:10:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:10:44,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:44,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:44,413 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-08-22 22:10:44,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:44,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340305051] [2020-08-22 22:10:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:10:44,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340305051] [2020-08-22 22:10:44,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:44,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:44,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987252687] [2020-08-22 22:10:44,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:44,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:44,764 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-08-22 22:10:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:44,873 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-08-22 22:10:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:10:44,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:10:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:44,891 INFO L225 Difference]: With dead ends: 37 [2020-08-22 22:10:44,891 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 22:10:44,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 22:10:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 22:10:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 22:10:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-22 22:10:44,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-08-22 22:10:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:44,967 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-22 22:10:44,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-22 22:10:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 22:10:44,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:44,972 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, 1] [2020-08-22 22:10:44,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:10:44,973 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-08-22 22:10:44,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:44,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706839285] [2020-08-22 22:10:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:10:45,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706839285] [2020-08-22 22:10:45,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:45,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:10:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244194476] [2020-08-22 22:10:45,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:10:45,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:10:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:45,136 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-22 22:10:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:45,221 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 22:10:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:45,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-22 22:10:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:45,224 INFO L225 Difference]: With dead ends: 34 [2020-08-22 22:10:45,224 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 22:10:45,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 22:10:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 22:10:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:10:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 22:10:45,242 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-08-22 22:10:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:45,243 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 22:10:45,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:10:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 22:10:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 22:10:45,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:45,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:45,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:10:45,247 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-08-22 22:10:45,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:45,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026265392] [2020-08-22 22:10:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:10:45,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026265392] [2020-08-22 22:10:45,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:45,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:10:45,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722117395] [2020-08-22 22:10:45,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:10:45,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:10:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:10:45,520 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-08-22 22:10:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:45,603 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-08-22 22:10:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:10:45,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-08-22 22:10:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:45,606 INFO L225 Difference]: With dead ends: 39 [2020-08-22 22:10:45,606 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 22:10:45,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:10:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 22:10:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 22:10:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 22:10:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 22:10:45,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-08-22 22:10:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:45,621 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 22:10:45,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:10:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 22:10:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 22:10:45,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:45,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:45,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:10:45,625 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-08-22 22:10:45,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:45,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659052902] [2020-08-22 22:10:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 22:10:45,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659052902] [2020-08-22 22:10:45,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:45,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:10:45,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869238345] [2020-08-22 22:10:45,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:10:45,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:10:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:45,920 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-08-22 22:10:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:46,049 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-22 22:10:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:10:46,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 22:10:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:46,052 INFO L225 Difference]: With dead ends: 44 [2020-08-22 22:10:46,052 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 22:10:46,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:10:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 22:10:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 22:10:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 22:10:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-08-22 22:10:46,067 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-08-22 22:10:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:46,067 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-08-22 22:10:46,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:10:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-08-22 22:10:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:10:46,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:46,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:46,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:10:46,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-08-22 22:10:46,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:46,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900725113] [2020-08-22 22:10:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:10:46,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900725113] [2020-08-22 22:10:46,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:46,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:10:46,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90997251] [2020-08-22 22:10:46,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:10:46,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:10:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:10:46,299 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-08-22 22:10:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:46,401 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 22:10:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:10:46,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-08-22 22:10:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:46,404 INFO L225 Difference]: With dead ends: 49 [2020-08-22 22:10:46,404 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 22:10:46,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 22:10:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 22:10:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 22:10:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-22 22:10:46,417 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-08-22 22:10:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:46,418 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-22 22:10:46,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:10:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-22 22:10:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 22:10:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:46,421 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:46,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:10:46,421 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-08-22 22:10:46,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:46,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092037254] [2020-08-22 22:10:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 22:10:46,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092037254] [2020-08-22 22:10:46,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:46,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:10:46,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773224663] [2020-08-22 22:10:46,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:10:46,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:10:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:10:46,657 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2020-08-22 22:10:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:46,756 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-08-22 22:10:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:10:46,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-08-22 22:10:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:46,759 INFO L225 Difference]: With dead ends: 54 [2020-08-22 22:10:46,759 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 22:10:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:10:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 22:10:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 22:10:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 22:10:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 22:10:46,773 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 56 [2020-08-22 22:10:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:46,774 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 22:10:46,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:10:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 22:10:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 22:10:46,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:46,777 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:46,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:10:46,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1000802417, now seen corresponding path program 6 times [2020-08-22 22:10:46,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:46,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807169549] [2020-08-22 22:10:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:46,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 22:10:47,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807169549] [2020-08-22 22:10:47,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:47,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:10:47,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42935969] [2020-08-22 22:10:47,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:10:47,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:47,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:10:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:10:47,045 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2020-08-22 22:10:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:47,193 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-22 22:10:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:10:47,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-08-22 22:10:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:47,199 INFO L225 Difference]: With dead ends: 59 [2020-08-22 22:10:47,199 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:10:47,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:10:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:10:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 22:10:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:10:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-22 22:10:47,226 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 64 [2020-08-22 22:10:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:47,227 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-22 22:10:47,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:10:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-22 22:10:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 22:10:47,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:47,229 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:47,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:10:47,233 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1977618599, now seen corresponding path program 7 times [2020-08-22 22:10:47,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:47,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319354245] [2020-08-22 22:10:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 22:10:47,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319354245] [2020-08-22 22:10:47,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:47,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:10:47,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503971692] [2020-08-22 22:10:47,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:10:47,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:47,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:10:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:10:47,539 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2020-08-22 22:10:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:47,679 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 22:10:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:10:47,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-08-22 22:10:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:47,681 INFO L225 Difference]: With dead ends: 64 [2020-08-22 22:10:47,681 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 22:10:47,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:10:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 22:10:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-22 22:10:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 22:10:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-22 22:10:47,693 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 72 [2020-08-22 22:10:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:47,694 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-22 22:10:47,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:10:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-22 22:10:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:10:47,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:47,696 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:47,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:10:47,696 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 555623729, now seen corresponding path program 8 times [2020-08-22 22:10:47,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:47,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783811366] [2020-08-22 22:10:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:47,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 22:10:48,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783811366] [2020-08-22 22:10:48,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:48,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:10:48,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986591134] [2020-08-22 22:10:48,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:10:48,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:10:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:10:48,012 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-08-22 22:10:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:48,157 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-08-22 22:10:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:10:48,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-08-22 22:10:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:48,160 INFO L225 Difference]: With dead ends: 69 [2020-08-22 22:10:48,161 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 22:10:48,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:10:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 22:10:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 22:10:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 22:10:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 22:10:48,173 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2020-08-22 22:10:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:48,174 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 22:10:48,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:10:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 22:10:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 22:10:48,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:48,176 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:48,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:10:48,177 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 777699815, now seen corresponding path program 9 times [2020-08-22 22:10:48,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:48,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145681059] [2020-08-22 22:10:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 22:10:48,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145681059] [2020-08-22 22:10:48,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:48,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:10:48,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255610559] [2020-08-22 22:10:48,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:10:48,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:10:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:48,589 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2020-08-22 22:10:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:48,760 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-22 22:10:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:10:48,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-08-22 22:10:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:48,762 INFO L225 Difference]: With dead ends: 74 [2020-08-22 22:10:48,762 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 22:10:48,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:10:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 22:10:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-08-22 22:10:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 22:10:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-08-22 22:10:48,774 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 88 [2020-08-22 22:10:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:48,775 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-08-22 22:10:48,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:10:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-08-22 22:10:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 22:10:48,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:48,776 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:48,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:10:48,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2145915377, now seen corresponding path program 10 times [2020-08-22 22:10:48,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:48,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808563893] [2020-08-22 22:10:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:48,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 22:10:49,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808563893] [2020-08-22 22:10:49,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:49,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:10:49,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058432287] [2020-08-22 22:10:49,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:10:49,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:10:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:10:49,325 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2020-08-22 22:10:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:49,499 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 22:10:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:10:49,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-08-22 22:10:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:49,501 INFO L225 Difference]: With dead ends: 79 [2020-08-22 22:10:49,501 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 22:10:49,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:10:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 22:10:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-22 22:10:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 22:10:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-22 22:10:49,522 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 96 [2020-08-22 22:10:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:49,522 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-22 22:10:49,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:10:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-22 22:10:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 22:10:49,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:49,524 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:49,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:10:49,524 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1180214055, now seen corresponding path program 11 times [2020-08-22 22:10:49,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:49,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551658802] [2020-08-22 22:10:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:49,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 22:10:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551658802] [2020-08-22 22:10:50,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:50,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:10:50,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493695986] [2020-08-22 22:10:50,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:10:50,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:10:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:10:50,167 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2020-08-22 22:10:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:50,378 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-08-22 22:10:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:10:50,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-08-22 22:10:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:50,380 INFO L225 Difference]: With dead ends: 84 [2020-08-22 22:10:50,380 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 22:10:50,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:10:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 22:10:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 22:10:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 22:10:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 22:10:50,394 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 104 [2020-08-22 22:10:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:50,395 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 22:10:50,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:10:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 22:10:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 22:10:50,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:50,397 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:50,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:10:50,397 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1287598415, now seen corresponding path program 12 times [2020-08-22 22:10:50,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:50,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730730944] [2020-08-22 22:10:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:50,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 22:10:51,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730730944] [2020-08-22 22:10:51,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:51,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:10:51,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675376507] [2020-08-22 22:10:51,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:10:51,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:10:51,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:10:51,087 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-08-22 22:10:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:51,341 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-22 22:10:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:10:51,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-08-22 22:10:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:51,344 INFO L225 Difference]: With dead ends: 89 [2020-08-22 22:10:51,344 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 22:10:51,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:10:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 22:10:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-22 22:10:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 22:10:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-08-22 22:10:51,367 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 112 [2020-08-22 22:10:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:51,368 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-08-22 22:10:51,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:10:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-08-22 22:10:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 22:10:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:51,375 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:51,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:10:51,376 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1612559463, now seen corresponding path program 13 times [2020-08-22 22:10:51,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:51,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035039847] [2020-08-22 22:10:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:51,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 22:10:52,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035039847] [2020-08-22 22:10:52,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:52,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:10:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906924428] [2020-08-22 22:10:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:10:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:10:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:10:52,111 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2020-08-22 22:10:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:52,341 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-22 22:10:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:10:52,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-08-22 22:10:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:52,343 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:10:52,343 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 22:10:52,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:10:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 22:10:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-22 22:10:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 22:10:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-08-22 22:10:52,353 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 120 [2020-08-22 22:10:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:52,354 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-08-22 22:10:52,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:10:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-08-22 22:10:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 22:10:52,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:52,356 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:52,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:10:52,356 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 996432753, now seen corresponding path program 14 times [2020-08-22 22:10:52,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:52,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977883768] [2020-08-22 22:10:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:52,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 22:10:53,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977883768] [2020-08-22 22:10:53,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:53,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:10:53,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107975914] [2020-08-22 22:10:53,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:10:53,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:10:53,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:10:53,162 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2020-08-22 22:10:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:53,444 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2020-08-22 22:10:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:10:53,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-08-22 22:10:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:53,446 INFO L225 Difference]: With dead ends: 99 [2020-08-22 22:10:53,447 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 22:10:53,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:10:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 22:10:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-22 22:10:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 22:10:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-22 22:10:53,461 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 128 [2020-08-22 22:10:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:53,462 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-22 22:10:53,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:10:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-22 22:10:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 22:10:53,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:53,464 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:53,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:10:53,465 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 418248103, now seen corresponding path program 15 times [2020-08-22 22:10:53,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:53,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173258075] [2020-08-22 22:10:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:53,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 22:10:54,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173258075] [2020-08-22 22:10:54,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:54,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:10:54,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540798114] [2020-08-22 22:10:54,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:10:54,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:10:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:10:54,275 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2020-08-22 22:10:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:54,516 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-08-22 22:10:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:10:54,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-08-22 22:10:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:54,519 INFO L225 Difference]: With dead ends: 104 [2020-08-22 22:10:54,519 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 22:10:54,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:10:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 22:10:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-08-22 22:10:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 22:10:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-08-22 22:10:54,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 136 [2020-08-22 22:10:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:54,530 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-08-22 22:10:54,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:10:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-08-22 22:10:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-22 22:10:54,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:54,532 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:54,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:10:54,533 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2106505265, now seen corresponding path program 16 times [2020-08-22 22:10:54,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:54,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701247044] [2020-08-22 22:10:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 22:10:55,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701247044] [2020-08-22 22:10:55,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:55,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 22:10:55,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766925634] [2020-08-22 22:10:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 22:10:55,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 22:10:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:10:55,330 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2020-08-22 22:10:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:55,570 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-08-22 22:10:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:10:55,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-08-22 22:10:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:55,573 INFO L225 Difference]: With dead ends: 109 [2020-08-22 22:10:55,573 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 22:10:55,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 22:10:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 22:10:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-08-22 22:10:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 22:10:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-08-22 22:10:55,588 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 144 [2020-08-22 22:10:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:55,588 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-08-22 22:10:55,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 22:10:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-08-22 22:10:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 22:10:55,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:55,590 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:55,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:10:55,591 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1225615079, now seen corresponding path program 17 times [2020-08-22 22:10:55,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:55,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100659213] [2020-08-22 22:10:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:55,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 22:10:56,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100659213] [2020-08-22 22:10:56,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:56,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:10:56,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620852106] [2020-08-22 22:10:56,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:10:56,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:10:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:10:56,485 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 22 states. [2020-08-22 22:10:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:56,793 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-08-22 22:10:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:10:56,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2020-08-22 22:10:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:56,795 INFO L225 Difference]: With dead ends: 114 [2020-08-22 22:10:56,795 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 22:10:56,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:10:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 22:10:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-08-22 22:10:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 22:10:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-08-22 22:10:56,807 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 152 [2020-08-22 22:10:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:56,807 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-08-22 22:10:56,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:10:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-08-22 22:10:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-22 22:10:56,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:56,809 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:56,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:10:56,810 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643855, now seen corresponding path program 18 times [2020-08-22 22:10:56,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:56,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596921214] [2020-08-22 22:10:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:56,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 22:10:57,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596921214] [2020-08-22 22:10:57,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:57,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:10:57,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665851193] [2020-08-22 22:10:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:10:57,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:10:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:10:57,844 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2020-08-22 22:10:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:58,186 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-08-22 22:10:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 22:10:58,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-08-22 22:10:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:58,188 INFO L225 Difference]: With dead ends: 119 [2020-08-22 22:10:58,188 INFO L226 Difference]: Without dead ends: 113 [2020-08-22 22:10:58,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:10:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-22 22:10:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-08-22 22:10:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 22:10:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-08-22 22:10:58,205 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 160 [2020-08-22 22:10:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:58,205 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-08-22 22:10:58,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:10:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-08-22 22:10:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 22:10:58,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:58,208 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:58,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:10:58,209 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1136658471, now seen corresponding path program 19 times [2020-08-22 22:10:58,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:58,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921251848] [2020-08-22 22:10:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:58,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 22:10:59,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921251848] [2020-08-22 22:10:59,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:59,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 22:10:59,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754132444] [2020-08-22 22:10:59,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 22:10:59,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:59,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 22:10:59,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:10:59,389 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 24 states. [2020-08-22 22:10:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:59,702 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-08-22 22:10:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:10:59,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2020-08-22 22:10:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:59,704 INFO L225 Difference]: With dead ends: 124 [2020-08-22 22:10:59,704 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 22:10:59,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:10:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 22:10:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-08-22 22:10:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-22 22:10:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-08-22 22:10:59,723 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 168 [2020-08-22 22:10:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:59,723 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-08-22 22:10:59,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 22:10:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-08-22 22:10:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 22:10:59,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:59,727 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:59,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:10:59,727 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1108876879, now seen corresponding path program 20 times [2020-08-22 22:10:59,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:59,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260178652] [2020-08-22 22:10:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-22 22:11:00,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260178652] [2020-08-22 22:11:00,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:00,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 22:11:00,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899879176] [2020-08-22 22:11:00,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 22:11:00,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 22:11:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:11:00,941 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 25 states. [2020-08-22 22:11:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:01,257 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2020-08-22 22:11:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:11:01,258 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2020-08-22 22:11:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:01,260 INFO L225 Difference]: With dead ends: 129 [2020-08-22 22:11:01,260 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 22:11:01,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 22:11:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 22:11:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-08-22 22:11:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 22:11:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-08-22 22:11:01,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 176 [2020-08-22 22:11:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:01,272 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-08-22 22:11:01,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 22:11:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-08-22 22:11:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-08-22 22:11:01,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:01,275 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:01,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:11:01,275 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 390715751, now seen corresponding path program 21 times [2020-08-22 22:11:01,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:01,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87003537] [2020-08-22 22:11:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:11:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:01,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-22 22:11:02,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87003537] [2020-08-22 22:11:02,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:02,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 22:11:02,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889040870] [2020-08-22 22:11:02,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 22:11:02,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 22:11:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:11:02,310 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 26 states. [2020-08-22 22:11:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:02,685 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2020-08-22 22:11:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 22:11:02,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2020-08-22 22:11:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:02,687 INFO L225 Difference]: With dead ends: 134 [2020-08-22 22:11:02,687 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 22:11:02,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 22:11:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 22:11:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-08-22 22:11:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-22 22:11:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-08-22 22:11:02,700 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 184 [2020-08-22 22:11:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:02,701 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-08-22 22:11:02,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 22:11:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-08-22 22:11:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-22 22:11:02,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:02,704 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:02,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 22:11:02,704 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1081168271, now seen corresponding path program 22 times [2020-08-22 22:11:02,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:02,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277041449] [2020-08-22 22:11:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:11:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:02,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-22 22:11:03,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277041449] [2020-08-22 22:11:03,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:03,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 22:11:03,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317175977] [2020-08-22 22:11:03,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 22:11:03,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 22:11:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:11:03,778 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 27 states. [2020-08-22 22:11:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:04,190 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2020-08-22 22:11:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:11:04,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2020-08-22 22:11:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:04,192 INFO L225 Difference]: With dead ends: 139 [2020-08-22 22:11:04,192 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 22:11:04,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 22:11:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 22:11:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-08-22 22:11:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 22:11:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-08-22 22:11:04,202 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 192 [2020-08-22 22:11:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:04,203 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-08-22 22:11:04,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 22:11:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-08-22 22:11:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 22:11:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:04,205 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:04,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 22:11:04,206 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -856761689, now seen corresponding path program 23 times [2020-08-22 22:11:04,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:04,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877733034] [2020-08-22 22:11:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:11:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:04,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-22 22:11:05,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877733034] [2020-08-22 22:11:05,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:05,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 22:11:05,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25738154] [2020-08-22 22:11:05,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 22:11:05,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 22:11:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:11:05,534 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 28 states. [2020-08-22 22:11:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:05,949 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-08-22 22:11:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:11:05,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2020-08-22 22:11:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:05,951 INFO L225 Difference]: With dead ends: 144 [2020-08-22 22:11:05,951 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 22:11:05,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:11:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 22:11:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-08-22 22:11:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 22:11:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-08-22 22:11:05,961 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 200 [2020-08-22 22:11:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:05,962 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-08-22 22:11:05,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 22:11:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-08-22 22:11:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-08-22 22:11:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:05,965 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:05,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 22:11:05,965 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 36457265, now seen corresponding path program 24 times [2020-08-22 22:11:05,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:05,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551379473] [2020-08-22 22:11:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:11:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:06,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:11:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-22 22:11:07,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551379473] [2020-08-22 22:11:07,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:07,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 22:11:07,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126712421] [2020-08-22 22:11:07,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 22:11:07,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:07,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 22:11:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:11:07,150 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 29 states. [2020-08-22 22:11:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:07,568 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2020-08-22 22:11:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 22:11:07,571 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2020-08-22 22:11:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:07,572 INFO L225 Difference]: With dead ends: 149 [2020-08-22 22:11:07,572 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 22:11:07,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 22:11:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 22:11:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-08-22 22:11:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 22:11:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-08-22 22:11:07,583 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 208 [2020-08-22 22:11:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:07,584 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-08-22 22:11:07,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 22:11:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-08-22 22:11:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 22:11:07,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:07,585 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:07,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 22:11:07,586 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:07,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1460466713, now seen corresponding path program 25 times [2020-08-22 22:11:07,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:07,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435397165] [2020-08-22 22:11:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:11:07,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:11:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:11:07,640 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:11:07,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:11:07,679 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:11:07,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 22:11:07,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:11:07 BoogieIcfgContainer [2020-08-22 22:11:07,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:11:07,759 INFO L168 Benchmark]: Toolchain (without parser) took 24265.18 ms. Allocated memory was 137.4 MB in the beginning and 715.7 MB in the end (delta: 578.3 MB). Free memory was 100.6 MB in the beginning and 675.4 MB in the end (delta: -574.8 MB). Peak memory consumption was 560.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,759 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.26 ms. Allocated memory is still 137.4 MB. Free memory was 100.4 MB in the beginning and 91.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,760 INFO L168 Benchmark]: Boogie Preprocessor took 158.67 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.1 MB in the beginning and 181.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,761 INFO L168 Benchmark]: RCFGBuilder took 309.98 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,761 INFO L168 Benchmark]: TraceAbstraction took 23484.21 ms. Allocated memory was 201.9 MB in the beginning and 715.7 MB in the end (delta: 513.8 MB). Free memory was 168.1 MB in the beginning and 675.4 MB in the end (delta: -507.3 MB). Peak memory consumption was 563.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:07,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.26 ms. Allocated memory is still 137.4 MB. Free memory was 100.4 MB in the beginning and 91.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.67 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.1 MB in the beginning and 181.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.98 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23484.21 ms. Allocated memory was 201.9 MB in the beginning and 715.7 MB in the end (delta: 513.8 MB). Free memory was 168.1 MB in the beginning and 675.4 MB in the end (delta: -507.3 MB). Peak memory consumption was 563.2 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] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; VAL [\old(x)=1, \result=1, id(x-1)=0, x=1] [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; VAL [\old(x)=2, \result=2, id(x-1)=1, x=2] [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; VAL [\old(x)=3, \result=3, id(x-1)=2, x=3] [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; VAL [\old(x)=4, \result=4, id(x-1)=3, x=4] [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; VAL [\old(x)=5, \result=5, id(x-1)=4, x=5] [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; VAL [\old(x)=6, \result=6, id(x-1)=5, x=6] [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; VAL [\old(x)=7, \result=7, id(x-1)=6, x=7] [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; VAL [\old(x)=8, \result=8, id(x-1)=7, x=8] [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; VAL [\old(x)=9, \result=9, id(x-1)=8, x=9] [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; VAL [\old(x)=10, \result=10, id(x-1)=9, x=10] [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; VAL [\old(x)=11, \result=11, id(x-1)=10, x=11] [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; VAL [\old(x)=12, \result=12, id(x-1)=11, x=12] [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; VAL [\old(x)=13, \result=13, id(x-1)=12, x=13] [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; VAL [\old(x)=14, \result=14, id(x-1)=13, x=14] [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; VAL [\old(x)=15, \result=15, id(x-1)=14, x=15] [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; VAL [\old(x)=16, \result=16, id(x-1)=15, x=16] [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; VAL [\old(x)=17, \result=17, id(x-1)=16, x=17] [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; VAL [\old(x)=18, \result=18, id(x-1)=17, x=18] [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; VAL [\old(x)=19, \result=19, id(x-1)=18, x=19] [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; VAL [\old(x)=20, \result=20, id(x-1)=19, x=20] [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; VAL [\old(x)=21, \result=21, id(x-1)=20, x=21] [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; VAL [\old(x)=22, \result=22, id(x-1)=21, x=22] [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; VAL [\old(x)=23, \result=23, id(x-1)=22, x=23] [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; VAL [\old(x)=24, \result=24, id(x-1)=23, x=24] [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; VAL [\old(x)=25, \result=25, id(x-1)=24, x=25] [L11] RET, EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); VAL [id(input)=25, input=25, result=25] [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.3s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 454 SDtfs, 1580 SDslu, 2545 SDs, 0 SdLazy, 955 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1425 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 3016 NumberOfCodeBlocks, 3016 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2775 ConstructedInterpolants, 0 QuantifiedInterpolants, 1030775 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 7500/19600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...