/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:45:11,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:45:11,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:45:11,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:45:11,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:45:11,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:45:11,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:45:11,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:45:11,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:45:11,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:45:11,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:45:11,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:45:11,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:45:11,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:45:11,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:45:11,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:45:11,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:45:11,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:45:11,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:45:11,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:45:11,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:45:11,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:45:11,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:45:11,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:45:11,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:45:11,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:45:11,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:45:11,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:45:11,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:45:11,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:45:11,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:45:11,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:45:11,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:45:11,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:45:11,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:45:11,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:45:11,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:45:11,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:45:11,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:45:11,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:45:11,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:45:11,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:45:11,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:45:11,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:45:11,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:45:11,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:45:11,546 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:45:11,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:45:11,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:45:11,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:45:11,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:45:11,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:45:11,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:45:11,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:45:11,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:45:11,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:45:11,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:45:11,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:45:11,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:45:11,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:45:11,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:45:11,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:45:11,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:45:11,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:45:11,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:45:11,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:45:11,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:45:11,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:45:11,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:45:11,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:45:11,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:45:11,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:45:11,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:45:11,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:45:11,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:45:11,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:45:11,938 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:45:11,939 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-19 02:45:12,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69ccc89f/d8d515d11d974fac962036ae7a1f2f00/FLAG634fbe45b [2020-08-19 02:45:12,448 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:45:12,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-19 02:45:12,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69ccc89f/d8d515d11d974fac962036ae7a1f2f00/FLAG634fbe45b [2020-08-19 02:45:12,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69ccc89f/d8d515d11d974fac962036ae7a1f2f00 [2020-08-19 02:45:12,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:45:12,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:45:12,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:12,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:45:12,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:45:12,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:12" (1/1) ... [2020-08-19 02:45:12,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa43bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:12, skipping insertion in model container [2020-08-19 02:45:12,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:12" (1/1) ... [2020-08-19 02:45:12,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:45:12,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:45:13,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:13,055 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:45:13,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:13,083 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:45:13,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13 WrapperNode [2020-08-19 02:45:13,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:13,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:45:13,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:45:13,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:45:13,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... [2020-08-19 02:45:13,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:45:13,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:45:13,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:45:13,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:45:13,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:45:13,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:45:13,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:45:13,262 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 02:45:13,262 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 02:45:13,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:45:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:45:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:45:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 02:45:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 02:45:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:45:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:45:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:45:13,479 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:45:13,480 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:45:13,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:13 BoogieIcfgContainer [2020-08-19 02:45:13,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:45:13,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:45:13,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:45:13,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:45:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:45:12" (1/3) ... [2020-08-19 02:45:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:13, skipping insertion in model container [2020-08-19 02:45:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:13" (2/3) ... [2020-08-19 02:45:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:13, skipping insertion in model container [2020-08-19 02:45:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:13" (3/3) ... [2020-08-19 02:45:13,495 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-08-19 02:45:13,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:45:13,519 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:45:13,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:45:13,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:45:13,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:45:13,574 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:45:13,574 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:45:13,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:45:13,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:45:13,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:45:13,575 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:45:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 02:45:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:45:13,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:13,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:13,616 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 02:45:13,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:13,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877272289] [2020-08-19 02:45:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:13,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:45:13,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877272289] [2020-08-19 02:45:13,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:13,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:13,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46039912] [2020-08-19 02:45:13,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:13,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:13,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:13,913 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 02:45:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:14,017 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 02:45:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:14,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:45:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:14,032 INFO L225 Difference]: With dead ends: 44 [2020-08-19 02:45:14,032 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 02:45:14,036 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 [2020-08-19 02:45:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 02:45:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 02:45:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:45:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 02:45:14,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 02:45:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:14,089 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 02:45:14,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 02:45:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:45:14,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:14,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:14,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:45:14,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 02:45:14,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:14,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140974781] [2020-08-19 02:45:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:45:14,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140974781] [2020-08-19 02:45:14,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:14,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:14,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498376225] [2020-08-19 02:45:14,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:14,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:14,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:14,205 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 02:45:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:14,283 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 02:45:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:14,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 02:45:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:14,286 INFO L225 Difference]: With dead ends: 36 [2020-08-19 02:45:14,286 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 02:45:14,288 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 [2020-08-19 02:45:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 02:45:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 02:45:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:45:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 02:45:14,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 02:45:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 02:45:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 02:45:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:45:14,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:14,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:14,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:45:14,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 02:45:14,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:14,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193709734] [2020-08-19 02:45:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:45:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 02:45:14,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193709734] [2020-08-19 02:45:14,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:14,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:14,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691778893] [2020-08-19 02:45:14,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:14,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:14,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:14,432 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 02:45:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:14,522 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 02:45:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:45:14,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 02:45:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:14,525 INFO L225 Difference]: With dead ends: 58 [2020-08-19 02:45:14,525 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 02:45:14,527 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 [2020-08-19 02:45:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 02:45:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 02:45:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 02:45:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 02:45:14,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 02:45:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:14,537 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 02:45:14,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 02:45:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:45:14,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:14,539 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] [2020-08-19 02:45:14,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:45:14,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 02:45:14,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:14,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76417796] [2020-08-19 02:45:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 02:45:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76417796] [2020-08-19 02:45:14,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:14,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844078689] [2020-08-19 02:45:14,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:14,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:14,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:14,649 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 02:45:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:14,836 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 02:45:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:45:14,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 02:45:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:14,840 INFO L225 Difference]: With dead ends: 54 [2020-08-19 02:45:14,841 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 02:45:14,842 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 [2020-08-19 02:45:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 02:45:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 02:45:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 02:45:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 02:45:14,855 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 02:45:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:14,856 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 02:45:14,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 02:45:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 02:45:14,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:14,858 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] [2020-08-19 02:45:14,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:45:14,859 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 02:45:14,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:14,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945709077] [2020-08-19 02:45:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:14,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:45:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:45:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 02:45:15,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945709077] [2020-08-19 02:45:15,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:15,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:45:15,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575648288] [2020-08-19 02:45:15,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:45:15,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:45:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:45:15,036 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 02:45:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:15,134 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 02:45:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:45:15,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 02:45:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:15,137 INFO L225 Difference]: With dead ends: 94 [2020-08-19 02:45:15,137 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 02:45:15,139 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 [2020-08-19 02:45:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 02:45:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 02:45:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 02:45:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 02:45:15,151 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 02:45:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:15,152 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 02:45:15,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:45:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 02:45:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 02:45:15,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:15,154 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] [2020-08-19 02:45:15,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:45:15,155 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 02:45:15,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:15,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925983877] [2020-08-19 02:45:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 02:45:15,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925983877] [2020-08-19 02:45:15,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:15,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:15,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80700231] [2020-08-19 02:45:15,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:15,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:15,287 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 02:45:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:15,420 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 02:45:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:45:15,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 02:45:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:15,422 INFO L225 Difference]: With dead ends: 103 [2020-08-19 02:45:15,422 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 02:45:15,424 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 [2020-08-19 02:45:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 02:45:15,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 02:45:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 02:45:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 02:45:15,442 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 02:45:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:15,444 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 02:45:15,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 02:45:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 02:45:15,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:15,451 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] [2020-08-19 02:45:15,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:45:15,451 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 02:45:15,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:15,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712595113] [2020-08-19 02:45:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 02:45:15,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712595113] [2020-08-19 02:45:15,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:15,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:15,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009975765] [2020-08-19 02:45:15,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:15,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:15,657 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 02:45:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:15,890 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 02:45:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:45:15,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 02:45:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:15,894 INFO L225 Difference]: With dead ends: 86 [2020-08-19 02:45:15,894 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 02:45:15,895 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 [2020-08-19 02:45:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 02:45:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 02:45:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 02:45:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 02:45:15,934 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 02:45:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:15,935 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 02:45:15,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 02:45:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 02:45:15,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:15,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-08-19 02:45:15,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:45:15,948 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 02:45:15,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:15,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604361451] [2020-08-19 02:45:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 02:45:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-19 02:45:16,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604361451] [2020-08-19 02:45:16,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:16,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:16,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709078476] [2020-08-19 02:45:16,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:16,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:16,127 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 02:45:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:16,248 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 02:45:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:45:16,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 02:45:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:16,251 INFO L225 Difference]: With dead ends: 167 [2020-08-19 02:45:16,251 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 02:45:16,252 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 [2020-08-19 02:45:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 02:45:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 02:45:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 02:45:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 02:45:16,268 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 02:45:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:16,269 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 02:45:16,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 02:45:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 02:45:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:16,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-08-19 02:45:16,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:45:16,271 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 02:45:16,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:16,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688654582] [2020-08-19 02:45:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 02:45:16,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688654582] [2020-08-19 02:45:16,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:16,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:45:16,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753567777] [2020-08-19 02:45:16,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:45:16,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:16,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:45:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:45:16,503 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 02:45:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:16,785 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 02:45:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:45:16,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 02:45:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:16,788 INFO L225 Difference]: With dead ends: 188 [2020-08-19 02:45:16,788 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 02:45:16,789 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 [2020-08-19 02:45:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 02:45:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 02:45:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 02:45:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 02:45:16,805 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 02:45:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:16,806 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 02:45:16,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:45:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 02:45:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 02:45:16,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:16,809 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:16,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:45:16,809 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 02:45:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:16,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778202833] [2020-08-19 02:45:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:16,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 02:45:17,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778202833] [2020-08-19 02:45:17,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:17,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:45:17,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579580895] [2020-08-19 02:45:17,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:45:17,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:45:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:45:17,038 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 02:45:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:17,443 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 02:45:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:45:17,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 02:45:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:17,447 INFO L225 Difference]: With dead ends: 199 [2020-08-19 02:45:17,448 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 02:45:17,451 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 [2020-08-19 02:45:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 02:45:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-19 02:45:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 02:45:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-19 02:45:17,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-19 02:45:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:17,472 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-19 02:45:17,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:45:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-19 02:45:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 02:45:17,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:17,474 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:17,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:45:17,475 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-19 02:45:17,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:17,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164296161] [2020-08-19 02:45:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 02:45:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-19 02:45:17,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164296161] [2020-08-19 02:45:17,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:17,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:45:17,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654926972] [2020-08-19 02:45:17,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:45:17,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:45:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:45:17,780 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-19 02:45:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:17,981 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-19 02:45:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:45:17,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-19 02:45:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:17,983 INFO L225 Difference]: With dead ends: 142 [2020-08-19 02:45:17,983 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:45:17,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:45:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:45:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 02:45:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 02:45:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-19 02:45:17,992 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-19 02:45:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:17,992 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-19 02:45:17,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:45:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-19 02:45:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-19 02:45:17,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:17,995 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:17,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:45:17,996 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-19 02:45:17,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:17,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354505232] [2020-08-19 02:45:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 02:45:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 02:45:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 02:45:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-19 02:45:18,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354505232] [2020-08-19 02:45:18,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:18,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:45:18,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318509412] [2020-08-19 02:45:18,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:45:18,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:45:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:45:18,428 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-19 02:45:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:18,803 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-19 02:45:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:45:18,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-19 02:45:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:18,805 INFO L225 Difference]: With dead ends: 178 [2020-08-19 02:45:18,805 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 02:45:18,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:45:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 02:45:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-19 02:45:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 02:45:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-19 02:45:18,820 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-19 02:45:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:18,821 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-19 02:45:18,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:45:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-19 02:45:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-19 02:45:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:18,826 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:18,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:45:18,826 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-19 02:45:18,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:18,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332738192] [2020-08-19 02:45:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:18,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 02:45:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-19 02:45:19,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332738192] [2020-08-19 02:45:19,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:19,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:45:19,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941114993] [2020-08-19 02:45:19,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:45:19,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:45:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:45:19,081 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-19 02:45:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:19,333 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-19 02:45:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:45:19,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-19 02:45:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:19,336 INFO L225 Difference]: With dead ends: 172 [2020-08-19 02:45:19,336 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 02:45:19,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:45:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 02:45:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-19 02:45:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-19 02:45:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-19 02:45:19,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-19 02:45:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:19,349 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-19 02:45:19,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:45:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-19 02:45:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 02:45:19,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:19,352 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:19,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:45:19,353 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-19 02:45:19,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:19,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223765927] [2020-08-19 02:45:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 02:45:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-19 02:45:19,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223765927] [2020-08-19 02:45:19,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:19,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:45:19,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40759330] [2020-08-19 02:45:19,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:45:19,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:45:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:45:19,595 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-19 02:45:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:19,956 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-19 02:45:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:45:19,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-19 02:45:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:19,958 INFO L225 Difference]: With dead ends: 185 [2020-08-19 02:45:19,959 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 02:45:19,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:45:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 02:45:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-19 02:45:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 02:45:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-19 02:45:19,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-19 02:45:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:19,969 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-19 02:45:19,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:45:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-19 02:45:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 02:45:19,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:19,971 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:19,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:45:19,972 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-19 02:45:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:19,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038328] [2020-08-19 02:45:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:45:19,989 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:45:19,989 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:45:19,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:45:20,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:45:20 BoogieIcfgContainer [2020-08-19 02:45:20,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:45:20,041 INFO L168 Benchmark]: Toolchain (without parser) took 7214.40 ms. Allocated memory was 136.8 MB in the beginning and 329.3 MB in the end (delta: 192.4 MB). Free memory was 100.0 MB in the beginning and 134.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 158.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:20,042 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:45:20,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.85 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:20,046 INFO L168 Benchmark]: Boogie Preprocessor took 110.36 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 179.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:20,052 INFO L168 Benchmark]: RCFGBuilder took 289.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.2 MB in the beginning and 164.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:20,053 INFO L168 Benchmark]: TraceAbstraction took 6550.15 ms. Allocated memory was 200.3 MB in the beginning and 329.3 MB in the end (delta: 129.0 MB). Free memory was 164.8 MB in the beginning and 134.0 MB in the end (delta: 30.8 MB). Peak memory consumption was 159.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:20,057 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 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.85 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.36 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 179.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.2 MB in the beginning and 164.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6550.15 ms. Allocated memory was 200.3 MB in the beginning and 329.3 MB in the end (delta: 129.0 MB). Free memory was 164.8 MB in the beginning and 134.0 MB in the end (delta: 30.8 MB). Peak memory consumption was 159.8 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 = 5; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 15, TraceHistogramMax: 17, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 411 SDslu, 1760 SDs, 0 SdLazy, 1938 SolverSat, 253 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 74 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 885 ConstructedInterpolants, 0 QuantifiedInterpolants, 140149 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1400/2017 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...