/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/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:08:27,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:08:27,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:08:27,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:08:27,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:08:27,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:08:27,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:08:27,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:08:27,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:08:27,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:08:27,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:08:27,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:08:27,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:08:27,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:08:27,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:08:27,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:08:27,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:08:27,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:08:27,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:08:27,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:08:27,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:08:27,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:08:27,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:08:27,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:08:27,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:08:27,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:08:27,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:08:27,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:08:27,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:08:27,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:08:27,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:08:27,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:08:27,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:08:27,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:08:27,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:08:27,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:08:27,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:08:27,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:08:27,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:08:27,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:08:27,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:08:27,379 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 22:08:27,394 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:08:27,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:08:27,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:08:27,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:08:27,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:08:27,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:08:27,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:08:27,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:08:27,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:08:27,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:08:27,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:08:27,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:08:27,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:08:27,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:08:27,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:08:27,401 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:08:27,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:08:27,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:08:27,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:08:27,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:08:27,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:08:27,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:08:27,402 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 22:08:27,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:08:27,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:08:27,728 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:08:27,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:08:27,731 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:08:27,731 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-08-22 22:08:27,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c7535c8/9a9fe034034943a09a9b7df3e95c2946/FLAG282f4ff0c [2020-08-22 22:08:28,308 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:08:28,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-08-22 22:08:28,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c7535c8/9a9fe034034943a09a9b7df3e95c2946/FLAG282f4ff0c [2020-08-22 22:08:28,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c7535c8/9a9fe034034943a09a9b7df3e95c2946 [2020-08-22 22:08:28,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:08:28,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:08:28,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:08:28,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:08:28,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:08:28,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:28,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6e27c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28, skipping insertion in model container [2020-08-22 22:08:28,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:28,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:08:28,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:08:28,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:08:28,898 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:08:28,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:08:28,927 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:08:28,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28 WrapperNode [2020-08-22 22:08:28,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:08:28,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:08:28,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:08:28,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:08:28,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:28,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (1/1) ... [2020-08-22 22:08:29,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:08:29,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:08:29,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:08:29,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:08:29,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (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 22:08:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:08:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:08:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 22:08:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 22:08:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:08:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:08:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:08:29,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:08:29,347 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:08:29,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:08:29 BoogieIcfgContainer [2020-08-22 22:08:29,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:08:29,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:08:29,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:08:29,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:08:29,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:08:28" (1/3) ... [2020-08-22 22:08:29,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623b3abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:08:29, skipping insertion in model container [2020-08-22 22:08:29,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:28" (2/3) ... [2020-08-22 22:08:29,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623b3abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:08:29, skipping insertion in model container [2020-08-22 22:08:29,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:08:29" (3/3) ... [2020-08-22 22:08:29,362 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-08-22 22:08:29,376 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:08:29,387 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:08:29,403 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:08:29,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:08:29,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:08:29,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:08:29,433 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:08:29,433 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:08:29,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:08:29,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:08:29,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:08:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 22:08:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:08:29,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:29,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:29,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-08-22 22:08:29,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:29,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993219752] [2020-08-22 22:08:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:29,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:29,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:29,802 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 22:08:29,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993219752] [2020-08-22 22:08:29,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:29,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:29,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994553204] [2020-08-22 22:08:29,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:29,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:29,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:29,848 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-08-22 22:08:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:30,038 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-08-22 22:08:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:30,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:08:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:30,059 INFO L225 Difference]: With dead ends: 58 [2020-08-22 22:08:30,059 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 22:08:30,068 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 22:08:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 22:08:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 22:08:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:08:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:08:30,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-08-22 22:08:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:30,163 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:08:30,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:08:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:08:30,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:30,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:30,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:08:30,169 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-08-22 22:08:30,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:30,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546691303] [2020-08-22 22:08:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,235 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 22:08:30,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546691303] [2020-08-22 22:08:30,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:30,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:30,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343630183] [2020-08-22 22:08:30,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:30,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:30,244 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-08-22 22:08:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:30,328 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 22:08:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:30,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 22:08:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:30,331 INFO L225 Difference]: With dead ends: 50 [2020-08-22 22:08:30,332 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:08:30,333 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 22:08:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:08:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:08:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:08:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:08:30,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-08-22 22:08:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:30,347 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:08:30,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:08:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 22:08:30,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:30,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:30,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:08:30,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-08-22 22:08:30,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:30,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224744490] [2020-08-22 22:08:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:08:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:08:30,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224744490] [2020-08-22 22:08:30,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:30,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:30,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679823869] [2020-08-22 22:08:30,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:30,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:30,496 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-08-22 22:08:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:30,595 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-08-22 22:08:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:08:30,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 22:08:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:30,598 INFO L225 Difference]: With dead ends: 82 [2020-08-22 22:08:30,599 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 22:08:30,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 22:08:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 22:08:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 22:08:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-08-22 22:08:30,615 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-08-22 22:08:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:30,615 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-08-22 22:08:30,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-08-22 22:08:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:08:30,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:30,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:30,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:08:30,619 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-08-22 22:08:30,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:30,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095766730] [2020-08-22 22:08:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:08:30,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095766730] [2020-08-22 22:08:30,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:30,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:30,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898994714] [2020-08-22 22:08:30,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:30,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:30,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:30,728 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-08-22 22:08:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:30,915 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-08-22 22:08:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:08:30,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-08-22 22:08:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:30,919 INFO L225 Difference]: With dead ends: 74 [2020-08-22 22:08:30,919 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 22:08:30,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:08:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 22:08:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-08-22 22:08:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 22:08:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-08-22 22:08:30,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34 [2020-08-22 22:08:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:30,938 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-08-22 22:08:30,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-08-22 22:08:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 22:08:30,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:30,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:30,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:08:30,942 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-08-22 22:08:30,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:30,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502076563] [2020-08-22 22:08:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:30,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:08:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 22:08:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 22:08:31,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502076563] [2020-08-22 22:08:31,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:31,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:08:31,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417828526] [2020-08-22 22:08:31,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:08:31,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:08:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:08:31,103 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-08-22 22:08:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:31,188 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-08-22 22:08:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:08:31,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-08-22 22:08:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:31,191 INFO L225 Difference]: With dead ends: 130 [2020-08-22 22:08:31,191 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 22:08:31,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 22:08:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 22:08:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 22:08:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-22 22:08:31,210 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2020-08-22 22:08:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:31,211 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-22 22:08:31,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:08:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-22 22:08:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:08:31,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:31,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:31,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:08:31,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-08-22 22:08:31,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:31,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274517262] [2020-08-22 22:08:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 22:08:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274517262] [2020-08-22 22:08:31,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:31,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:31,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090162207] [2020-08-22 22:08:31,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:31,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:31,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:31,352 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states. [2020-08-22 22:08:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:31,461 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2020-08-22 22:08:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:08:31,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 22:08:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:31,464 INFO L225 Difference]: With dead ends: 142 [2020-08-22 22:08:31,464 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 22:08:31,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 22:08:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-08-22 22:08:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 22:08:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-08-22 22:08:31,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2020-08-22 22:08:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:31,482 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-08-22 22:08:31,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-08-22 22:08:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:08:31,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:31,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:31,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:08:31,486 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-08-22 22:08:31,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:31,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695535423] [2020-08-22 22:08:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 22:08:31,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695535423] [2020-08-22 22:08:31,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:31,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:31,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359940337] [2020-08-22 22:08:31,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:31,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:31,630 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states. [2020-08-22 22:08:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:31,828 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2020-08-22 22:08:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:08:31,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-22 22:08:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:31,831 INFO L225 Difference]: With dead ends: 118 [2020-08-22 22:08:31,831 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:08:31,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:08:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-08-22 22:08:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-22 22:08:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2020-08-22 22:08:31,868 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52 [2020-08-22 22:08:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:31,868 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2020-08-22 22:08:31,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2020-08-22 22:08:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 22:08:31,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:31,874 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:31,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:08:31,874 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times [2020-08-22 22:08:31,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:31,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170861658] [2020-08-22 22:08:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:31,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 22:08:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:08:32,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170861658] [2020-08-22 22:08:32,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:32,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:32,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988225362] [2020-08-22 22:08:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:32,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:32,087 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states. [2020-08-22 22:08:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:32,218 INFO L93 Difference]: Finished difference Result 227 states and 348 transitions. [2020-08-22 22:08:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:08:32,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-08-22 22:08:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:32,222 INFO L225 Difference]: With dead ends: 227 [2020-08-22 22:08:32,222 INFO L226 Difference]: Without dead ends: 127 [2020-08-22 22:08:32,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-22 22:08:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-08-22 22:08:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-08-22 22:08:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-08-22 22:08:32,249 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69 [2020-08-22 22:08:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:32,249 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-08-22 22:08:32,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-08-22 22:08:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 22:08:32,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:32,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:32,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:08:32,253 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times [2020-08-22 22:08:32,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:32,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194064460] [2020-08-22 22:08:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 22:08:32,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194064460] [2020-08-22 22:08:32,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:32,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:32,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554795245] [2020-08-22 22:08:32,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:32,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:32,437 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states. [2020-08-22 22:08:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:32,712 INFO L93 Difference]: Finished difference Result 257 states and 400 transitions. [2020-08-22 22:08:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:08:32,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-22 22:08:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:32,717 INFO L225 Difference]: With dead ends: 257 [2020-08-22 22:08:32,717 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 22:08:32,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 22:08:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-08-22 22:08:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 22:08:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2020-08-22 22:08:32,756 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70 [2020-08-22 22:08:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:32,757 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2020-08-22 22:08:32,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2020-08-22 22:08:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 22:08:32,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:32,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:32,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:08:32,761 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times [2020-08-22 22:08:32,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:32,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931948635] [2020-08-22 22:08:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:32,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-22 22:08:33,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931948635] [2020-08-22 22:08:33,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:33,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:08:33,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747286935] [2020-08-22 22:08:33,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:08:33,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:33,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:08:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:08:33,023 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states. [2020-08-22 22:08:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:33,458 INFO L93 Difference]: Finished difference Result 265 states and 420 transitions. [2020-08-22 22:08:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:08:33,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-08-22 22:08:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:33,461 INFO L225 Difference]: With dead ends: 265 [2020-08-22 22:08:33,462 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 22:08:33,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:08:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 22:08:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-08-22 22:08:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 22:08:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-22 22:08:33,479 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 105 [2020-08-22 22:08:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:33,480 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-22 22:08:33,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:08:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-22 22:08:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 22:08:33,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:33,482 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:33,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:08:33,482 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1534580400, now seen corresponding path program 1 times [2020-08-22 22:08:33,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:33,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523081144] [2020-08-22 22:08:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 22:08:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 50 proven. 67 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-08-22 22:08:33,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523081144] [2020-08-22 22:08:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:33,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563595260] [2020-08-22 22:08:33,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:33,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:33,683 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 10 states. [2020-08-22 22:08:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:33,906 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2020-08-22 22:08:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:08:33,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-08-22 22:08:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:33,910 INFO L225 Difference]: With dead ends: 193 [2020-08-22 22:08:33,910 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:08:33,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:08:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-22 22:08:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 22:08:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-08-22 22:08:33,927 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 123 [2020-08-22 22:08:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:33,929 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-08-22 22:08:33,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-08-22 22:08:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 22:08:33,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:33,932 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:33,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:08:33,933 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 822116120, now seen corresponding path program 2 times [2020-08-22 22:08:33,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:33,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668203251] [2020-08-22 22:08:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 22:08:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 72 proven. 111 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-22 22:08:34,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668203251] [2020-08-22 22:08:34,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:34,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:08:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729843829] [2020-08-22 22:08:34,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:08:34,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:08:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:08:34,203 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 12 states. [2020-08-22 22:08:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:34,622 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2020-08-22 22:08:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:08:34,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 140 [2020-08-22 22:08:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:34,626 INFO L225 Difference]: With dead ends: 241 [2020-08-22 22:08:34,626 INFO L226 Difference]: Without dead ends: 141 [2020-08-22 22:08:34,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:08:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-22 22:08:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-08-22 22:08:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 22:08:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-08-22 22:08:34,658 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 140 [2020-08-22 22:08:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:34,659 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-08-22 22:08:34,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:08:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-08-22 22:08:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 22:08:34,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:34,665 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:34,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:08:34,666 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1260071360, now seen corresponding path program 2 times [2020-08-22 22:08:34,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:34,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423466844] [2020-08-22 22:08:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-08-22 22:08:34,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423466844] [2020-08-22 22:08:34,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:34,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:08:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449814291] [2020-08-22 22:08:34,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:08:34,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:08:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:34,952 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 10 states. [2020-08-22 22:08:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:35,206 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2020-08-22 22:08:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:08:35,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-08-22 22:08:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:35,211 INFO L225 Difference]: With dead ends: 244 [2020-08-22 22:08:35,211 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 22:08:35,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:08:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 22:08:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 213. [2020-08-22 22:08:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 22:08:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 287 transitions. [2020-08-22 22:08:35,252 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 287 transitions. Word has length 140 [2020-08-22 22:08:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:35,253 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 287 transitions. [2020-08-22 22:08:35,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:08:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 287 transitions. [2020-08-22 22:08:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 22:08:35,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:35,258 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:35,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:08:35,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash -88380307, now seen corresponding path program 3 times [2020-08-22 22:08:35,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:35,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020574110] [2020-08-22 22:08:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 179 proven. 163 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-22 22:08:35,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020574110] [2020-08-22 22:08:35,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:35,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:08:35,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492339339] [2020-08-22 22:08:35,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:08:35,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:08:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:35,670 INFO L87 Difference]: Start difference. First operand 213 states and 287 transitions. Second operand 14 states. [2020-08-22 22:08:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:36,226 INFO L93 Difference]: Finished difference Result 470 states and 677 transitions. [2020-08-22 22:08:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:08:36,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-08-22 22:08:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:36,232 INFO L225 Difference]: With dead ends: 470 [2020-08-22 22:08:36,232 INFO L226 Difference]: Without dead ends: 257 [2020-08-22 22:08:36,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:08:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-08-22 22:08:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 233. [2020-08-22 22:08:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-08-22 22:08:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 310 transitions. [2020-08-22 22:08:36,271 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 310 transitions. Word has length 193 [2020-08-22 22:08:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:36,272 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 310 transitions. [2020-08-22 22:08:36,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:08:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 310 transitions. [2020-08-22 22:08:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-08-22 22:08:36,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:36,279 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:36,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:08:36,280 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1293350858, now seen corresponding path program 4 times [2020-08-22 22:08:36,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:36,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314214103] [2020-08-22 22:08:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 22:08:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:36,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 199 proven. 672 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-08-22 22:08:37,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314214103] [2020-08-22 22:08:37,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:37,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:08:37,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805648072] [2020-08-22 22:08:37,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:08:37,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:08:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:37,254 INFO L87 Difference]: Start difference. First operand 233 states and 310 transitions. Second operand 14 states. [2020-08-22 22:08:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:37,939 INFO L93 Difference]: Finished difference Result 541 states and 798 transitions. [2020-08-22 22:08:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:08:37,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 351 [2020-08-22 22:08:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:37,947 INFO L225 Difference]: With dead ends: 541 [2020-08-22 22:08:37,947 INFO L226 Difference]: Without dead ends: 308 [2020-08-22 22:08:37,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:08:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-22 22:08:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 269. [2020-08-22 22:08:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 22:08:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 359 transitions. [2020-08-22 22:08:38,005 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 359 transitions. Word has length 351 [2020-08-22 22:08:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:38,005 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 359 transitions. [2020-08-22 22:08:38,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:08:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 359 transitions. [2020-08-22 22:08:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-08-22 22:08:38,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:38,010 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:38,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:08:38,011 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1117162661, now seen corresponding path program 5 times [2020-08-22 22:08:38,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:38,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050708946] [2020-08-22 22:08:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 60 proven. 311 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-08-22 22:08:38,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050708946] [2020-08-22 22:08:38,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:38,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:08:38,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665884467] [2020-08-22 22:08:38,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:08:38,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:08:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:38,642 INFO L87 Difference]: Start difference. First operand 269 states and 359 transitions. Second operand 11 states. [2020-08-22 22:08:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:39,101 INFO L93 Difference]: Finished difference Result 530 states and 743 transitions. [2020-08-22 22:08:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:08:39,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 228 [2020-08-22 22:08:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:39,135 INFO L225 Difference]: With dead ends: 530 [2020-08-22 22:08:39,136 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 22:08:39,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:08:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 22:08:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 499. [2020-08-22 22:08:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-08-22 22:08:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 696 transitions. [2020-08-22 22:08:39,254 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 696 transitions. Word has length 228 [2020-08-22 22:08:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:39,255 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 696 transitions. [2020-08-22 22:08:39,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:08:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 696 transitions. [2020-08-22 22:08:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-22 22:08:39,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:39,275 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 25, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:39,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:08:39,276 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1689130430, now seen corresponding path program 6 times [2020-08-22 22:08:39,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:39,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398377181] [2020-08-22 22:08:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 22:08:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:39,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-08-22 22:08:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 22:08:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4744 backedges. 268 proven. 732 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2020-08-22 22:08:40,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398377181] [2020-08-22 22:08:40,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:40,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:08:40,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358176347] [2020-08-22 22:08:40,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:08:40,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:08:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:40,757 INFO L87 Difference]: Start difference. First operand 499 states and 696 transitions. Second operand 11 states. [2020-08-22 22:08:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:41,128 INFO L93 Difference]: Finished difference Result 987 states and 1429 transitions. [2020-08-22 22:08:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:08:41,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 495 [2020-08-22 22:08:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:41,140 INFO L225 Difference]: With dead ends: 987 [2020-08-22 22:08:41,140 INFO L226 Difference]: Without dead ends: 501 [2020-08-22 22:08:41,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:08:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-08-22 22:08:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 489. [2020-08-22 22:08:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-08-22 22:08:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 671 transitions. [2020-08-22 22:08:41,219 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 671 transitions. Word has length 495 [2020-08-22 22:08:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:41,219 INFO L479 AbstractCegarLoop]: Abstraction has 489 states and 671 transitions. [2020-08-22 22:08:41,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:08:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 671 transitions. [2020-08-22 22:08:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-08-22 22:08:41,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:41,234 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 26, 25, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:41,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:08:41,235 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash -162868606, now seen corresponding path program 7 times [2020-08-22 22:08:41,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:41,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152670827] [2020-08-22 22:08:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:41,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-08-22 22:08:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:42,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6210 backedges. 1314 proven. 1694 refuted. 0 times theorem prover too weak. 3202 trivial. 0 not checked. [2020-08-22 22:08:43,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152670827] [2020-08-22 22:08:43,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:43,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:08:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357286466] [2020-08-22 22:08:43,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:08:43,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:08:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:08:43,107 INFO L87 Difference]: Start difference. First operand 489 states and 671 transitions. Second operand 16 states. [2020-08-22 22:08:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:44,013 INFO L93 Difference]: Finished difference Result 892 states and 1362 transitions. [2020-08-22 22:08:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 22:08:44,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 563 [2020-08-22 22:08:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:44,022 INFO L225 Difference]: With dead ends: 892 [2020-08-22 22:08:44,022 INFO L226 Difference]: Without dead ends: 401 [2020-08-22 22:08:44,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:08:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-08-22 22:08:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2020-08-22 22:08:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-22 22:08:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-22 22:08:44,069 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 563 [2020-08-22 22:08:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:44,070 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-22 22:08:44,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:08:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-22 22:08:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-08-22 22:08:44,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:44,079 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 18, 17, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:44,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:08:44,079 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1725201844, now seen corresponding path program 8 times [2020-08-22 22:08:44,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:44,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652089522] [2020-08-22 22:08:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 22:08:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 280 proven. 716 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2020-08-22 22:08:45,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652089522] [2020-08-22 22:08:45,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:45,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:08:45,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360801424] [2020-08-22 22:08:45,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:08:45,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:08:45,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:08:45,109 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 14 states. [2020-08-22 22:08:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:45,678 INFO L93 Difference]: Finished difference Result 707 states and 995 transitions. [2020-08-22 22:08:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 22:08:45,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 387 [2020-08-22 22:08:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:45,688 INFO L225 Difference]: With dead ends: 707 [2020-08-22 22:08:45,688 INFO L226 Difference]: Without dead ends: 385 [2020-08-22 22:08:45,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:08:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-08-22 22:08:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 353. [2020-08-22 22:08:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-08-22 22:08:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 465 transitions. [2020-08-22 22:08:45,755 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 465 transitions. Word has length 387 [2020-08-22 22:08:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:45,756 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 465 transitions. [2020-08-22 22:08:45,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:08:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 465 transitions. [2020-08-22 22:08:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-08-22 22:08:45,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:45,760 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:45,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:08:45,760 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash 549243331, now seen corresponding path program 9 times [2020-08-22 22:08:45,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:45,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014342621] [2020-08-22 22:08:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:45,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 22:08:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2534 backedges. 130 proven. 672 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2020-08-22 22:08:46,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014342621] [2020-08-22 22:08:46,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:46,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:08:46,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217496112] [2020-08-22 22:08:46,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:08:46,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:08:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:08:46,572 INFO L87 Difference]: Start difference. First operand 353 states and 465 transitions. Second operand 12 states. [2020-08-22 22:08:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:46,979 INFO L93 Difference]: Finished difference Result 768 states and 1052 transitions. [2020-08-22 22:08:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:08:46,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 369 [2020-08-22 22:08:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:46,998 INFO L225 Difference]: With dead ends: 768 [2020-08-22 22:08:46,998 INFO L226 Difference]: Without dead ends: 762 [2020-08-22 22:08:47,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:08:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-08-22 22:08:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 727. [2020-08-22 22:08:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-08-22 22:08:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 994 transitions. [2020-08-22 22:08:47,128 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 994 transitions. Word has length 369 [2020-08-22 22:08:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:47,129 INFO L479 AbstractCegarLoop]: Abstraction has 727 states and 994 transitions. [2020-08-22 22:08:47,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:08:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 994 transitions. [2020-08-22 22:08:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-08-22 22:08:47,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:47,139 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 10, 10, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:47,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:08:47,139 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1058675901, now seen corresponding path program 10 times [2020-08-22 22:08:47,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:47,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955365684] [2020-08-22 22:08:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 22:08:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 451 [2020-08-22 22:08:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 747 proven. 1629 refuted. 0 times theorem prover too weak. 4620 trivial. 0 not checked. [2020-08-22 22:08:48,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955365684] [2020-08-22 22:08:48,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:48,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:08:48,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002901163] [2020-08-22 22:08:48,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:08:48,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:08:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:08:48,921 INFO L87 Difference]: Start difference. First operand 727 states and 994 transitions. Second operand 18 states. [2020-08-22 22:08:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:49,903 INFO L93 Difference]: Finished difference Result 1267 states and 1913 transitions. [2020-08-22 22:08:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 22:08:49,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 598 [2020-08-22 22:08:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:49,916 INFO L225 Difference]: With dead ends: 1267 [2020-08-22 22:08:49,916 INFO L226 Difference]: Without dead ends: 542 [2020-08-22 22:08:49,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:08:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-08-22 22:08:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 468. [2020-08-22 22:08:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-08-22 22:08:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 640 transitions. [2020-08-22 22:08:49,991 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 640 transitions. Word has length 598 [2020-08-22 22:08:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:49,992 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 640 transitions. [2020-08-22 22:08:49,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:08:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 640 transitions. [2020-08-22 22:08:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2020-08-22 22:08:49,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:49,999 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 9, 9, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:49,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:08:50,000 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:50,000 INFO L82 PathProgramCache]: Analyzing trace with hash -444779053, now seen corresponding path program 11 times [2020-08-22 22:08:50,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:50,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212252650] [2020-08-22 22:08:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 22:08:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 22:08:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:08:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:50,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:08:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5757 backedges. 560 proven. 1270 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-08-22 22:08:51,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212252650] [2020-08-22 22:08:51,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:51,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:08:51,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460861842] [2020-08-22 22:08:51,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:08:51,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:08:51,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:08:51,531 INFO L87 Difference]: Start difference. First operand 468 states and 640 transitions. Second operand 16 states. [2020-08-22 22:08:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:52,180 INFO L93 Difference]: Finished difference Result 958 states and 1371 transitions. [2020-08-22 22:08:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:08:52,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 545 [2020-08-22 22:08:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:52,193 INFO L225 Difference]: With dead ends: 958 [2020-08-22 22:08:52,193 INFO L226 Difference]: Without dead ends: 508 [2020-08-22 22:08:52,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:08:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-08-22 22:08:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 443. [2020-08-22 22:08:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-08-22 22:08:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 588 transitions. [2020-08-22 22:08:52,252 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 588 transitions. Word has length 545 [2020-08-22 22:08:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:52,253 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 588 transitions. [2020-08-22 22:08:52,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:08:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 588 transitions. [2020-08-22 22:08:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-08-22 22:08:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:52,260 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 10, 10, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:52,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 22:08:52,260 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -425442147, now seen corresponding path program 12 times [2020-08-22 22:08:52,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:52,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282940762] [2020-08-22 22:08:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:08:52,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:08:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:08:52,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:08:52,600 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:08:52,602 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:08:52,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 22:08:52,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:08:52 BoogieIcfgContainer [2020-08-22 22:08:52,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:08:52,730 INFO L168 Benchmark]: Toolchain (without parser) took 24046.81 ms. Allocated memory was 137.9 MB in the beginning and 1.0 GB in the end (delta: 864.0 MB). Free memory was 102.3 MB in the beginning and 434.0 MB in the end (delta: -331.7 MB). Peak memory consumption was 532.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,730 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.16 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,731 INFO L168 Benchmark]: Boogie Preprocessor took 133.11 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.1 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,732 INFO L168 Benchmark]: RCFGBuilder took 290.65 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 166.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,733 INFO L168 Benchmark]: TraceAbstraction took 23372.36 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 799.5 MB). Free memory was 166.4 MB in the beginning and 434.0 MB in the end (delta: -267.7 MB). Peak memory consumption was 531.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:08:52,735 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.16 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.11 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.1 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.65 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 166.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23372.36 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 799.5 MB). Free memory was 166.4 MB in the beginning and 434.0 MB in the end (delta: -267.7 MB). Peak memory consumption was 531.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=4, \result=3, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=5, \result=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=6, \result=8, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=5, \result=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=7, \result=13, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=5, \result=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=4, \result=3, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=6, \result=8, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=8, \result=21, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); VAL [fibo1(x)=21, result=21, x=8] [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.1s, OverallIterations: 23, TraceHistogramMax: 35, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1070 SDtfs, 1509 SDslu, 6228 SDs, 0 SdLazy, 5666 SolverSat, 700 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1466 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=727occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 22 MinimizatonAttempts, 476 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 5227 NumberOfCodeBlocks, 5227 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 4607 ConstructedInterpolants, 0 QuantifiedInterpolants, 2587115 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 25705/33967 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...