/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:31:44,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:31:44,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:31:44,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:31:44,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:31:44,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:31:44,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:31:44,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:31:44,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:31:44,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:31:44,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:31:44,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:31:44,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:31:44,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:31:44,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:31:44,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:31:44,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:31:44,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:31:44,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:31:44,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:31:44,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:31:44,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:31:44,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:31:44,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:31:44,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 10:31:44,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 10:31:44,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 10:31:44,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 10:31:44,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 10:31:44,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 10:31:44,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:31:44,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:31:44,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:31:44,556 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 [2020-08-18 10:31:44,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:31:44,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:31:44,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:31:44,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:31:44,579 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:31:44,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:31:44,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:31:44,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:31:44,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:31:44,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:31:44,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:31:44,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:31:44,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:31:44,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:31:44,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:31:44,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:31:44,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:31:44,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:31:44,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:31:44,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:31:44,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:31:44,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:31:44,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:31:44,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:31:44,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:31:44,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:31:44,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:31:44,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:31:44,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:31:44,584 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 -> false [2020-08-18 10:31:44,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:31:44,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:31:44,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:31:44,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:31:44,959 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:31:44,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-08-18 10:31:45,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2936f5754/419a72200e3c47dd90b4b308368f9f00/FLAGe54b59236 [2020-08-18 10:31:45,555 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:31:45,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-08-18 10:31:45,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2936f5754/419a72200e3c47dd90b4b308368f9f00/FLAGe54b59236 [2020-08-18 10:31:45,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2936f5754/419a72200e3c47dd90b4b308368f9f00 [2020-08-18 10:31:45,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:31:45,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:31:45,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:31:45,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:31:45,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:31:45,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:31:45" (1/1) ... [2020-08-18 10:31:45,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6920a351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:45, skipping insertion in model container [2020-08-18 10:31:45,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:31:45" (1/1) ... [2020-08-18 10:31:45,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:31:46,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:31:46,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:31:46,212 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:31:46,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:31:46,246 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:31:46,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46 WrapperNode [2020-08-18 10:31:46,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:31:46,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:31:46,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:31:46,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:31:46,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (1/1) ... [2020-08-18 10:31:46,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:31:46,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:31:46,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:31:46,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:31:46,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (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 [2020-08-18 10:31:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:31:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:31:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 10:31:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:31:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 10:31:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:31:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 10:31:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:31:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:31:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:31:46,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:31:46,639 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 10:31:46,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:31:46 BoogieIcfgContainer [2020-08-18 10:31:46,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:31:46,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:31:46,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:31:46,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:31:46,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:31:45" (1/3) ... [2020-08-18 10:31:46,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72be5cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:31:46, skipping insertion in model container [2020-08-18 10:31:46,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:31:46" (2/3) ... [2020-08-18 10:31:46,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72be5cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:31:46, skipping insertion in model container [2020-08-18 10:31:46,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:31:46" (3/3) ... [2020-08-18 10:31:46,653 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-08-18 10:31:46,663 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:31:46,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:31:46,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:31:46,706 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:31:46,706 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:31:46,706 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:31:46,707 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:31:46,708 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:31:46,708 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:31:46,708 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:31:46,708 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:31:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 10:31:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 10:31:46,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:46,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:46,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:46,735 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 10:31:46,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:46,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672132742] [2020-08-18 10:31:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:46,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:46,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:31:47,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672132742] [2020-08-18 10:31:47,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:31:47,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:31:47,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963358010] [2020-08-18 10:31:47,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:31:47,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:31:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:31:47,079 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 10:31:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:47,152 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 10:31:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 10:31:47,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 10:31:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:47,163 INFO L225 Difference]: With dead ends: 30 [2020-08-18 10:31:47,163 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 10:31:47,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:31:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 10:31:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 10:31:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 10:31:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 10:31:47,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 10:31:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:47,207 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 10:31:47,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:31:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 10:31:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 10:31:47,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:47,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:47,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:31:47,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 10:31:47,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:47,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924065173] [2020-08-18 10:31:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 10:31:47,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924065173] [2020-08-18 10:31:47,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:47,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 10:31:47,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312312627] [2020-08-18 10:31:47,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 10:31:47,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 10:31:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:31:47,350 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 10:31:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:47,430 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 10:31:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:31:47,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 10:31:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:47,433 INFO L225 Difference]: With dead ends: 25 [2020-08-18 10:31:47,433 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 10:31:47,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:31:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 10:31:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 10:31:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 10:31:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 10:31:47,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 10:31:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:47,442 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 10:31:47,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 10:31:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 10:31:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 10:31:47,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:47,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:47,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:31:47,444 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:47,445 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 10:31:47,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:47,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183314786] [2020-08-18 10:31:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 10:31:47,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183314786] [2020-08-18 10:31:47,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:47,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 10:31:47,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870443629] [2020-08-18 10:31:47,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 10:31:47,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 10:31:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:31:47,591 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 10:31:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:47,653 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 10:31:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 10:31:47,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 10:31:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:47,656 INFO L225 Difference]: With dead ends: 28 [2020-08-18 10:31:47,656 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 10:31:47,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:31:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 10:31:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 10:31:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 10:31:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 10:31:47,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 10:31:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:47,664 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 10:31:47,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 10:31:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 10:31:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 10:31:47,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:47,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:47,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:31:47,666 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:47,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 10:31:47,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:47,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391406049] [2020-08-18 10:31:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 10:31:47,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391406049] [2020-08-18 10:31:47,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:47,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 10:31:47,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935305788] [2020-08-18 10:31:47,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:31:47,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:31:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:31:47,968 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 10:31:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:48,063 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 10:31:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 10:31:48,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 10:31:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:48,065 INFO L225 Difference]: With dead ends: 31 [2020-08-18 10:31:48,065 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 10:31:48,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 10:31:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 10:31:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 10:31:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 10:31:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 10:31:48,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 10:31:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:48,074 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 10:31:48,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:31:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 10:31:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 10:31:48,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:48,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:48,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:31:48,076 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 10:31:48,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:48,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550059944] [2020-08-18 10:31:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 10:31:48,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550059944] [2020-08-18 10:31:48,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:48,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 10:31:48,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172537291] [2020-08-18 10:31:48,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:31:48,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:31:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:31:48,322 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 10:31:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:48,420 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 10:31:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 10:31:48,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 10:31:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:48,422 INFO L225 Difference]: With dead ends: 34 [2020-08-18 10:31:48,424 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 10:31:48,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:31:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 10:31:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 10:31:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 10:31:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 10:31:48,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 10:31:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:48,440 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 10:31:48,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:31:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 10:31:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 10:31:48,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:48,446 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:48,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:31:48,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 10:31:48,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:48,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268907236] [2020-08-18 10:31:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 10:31:48,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268907236] [2020-08-18 10:31:48,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:48,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 10:31:48,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203399714] [2020-08-18 10:31:48,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:31:48,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:31:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:31:48,705 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 10:31:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:48,810 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 10:31:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 10:31:48,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 10:31:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:48,812 INFO L225 Difference]: With dead ends: 37 [2020-08-18 10:31:48,812 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 10:31:48,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 10:31:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 10:31:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 10:31:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 10:31:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 10:31:48,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 10:31:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:48,827 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 10:31:48,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:31:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 10:31:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 10:31:48,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:48,829 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:48,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 10:31:48,830 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 10:31:48,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:48,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306391] [2020-08-18 10:31:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:48,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 10:31:49,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306391] [2020-08-18 10:31:49,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 10:31:49,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157998418] [2020-08-18 10:31:49,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 10:31:49,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:49,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 10:31:49,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 10:31:49,041 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 10:31:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:49,159 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 10:31:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 10:31:49,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 10:31:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:49,162 INFO L225 Difference]: With dead ends: 40 [2020-08-18 10:31:49,162 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 10:31:49,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:31:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 10:31:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 10:31:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 10:31:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 10:31:49,170 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 10:31:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:49,171 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 10:31:49,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 10:31:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 10:31:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 10:31:49,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:49,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:49,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 10:31:49,173 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 10:31:49,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:49,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007814409] [2020-08-18 10:31:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 10:31:49,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007814409] [2020-08-18 10:31:49,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:49,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 10:31:49,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049854354] [2020-08-18 10:31:49,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 10:31:49,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 10:31:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 10:31:49,391 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 10:31:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:49,505 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 10:31:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:31:49,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 10:31:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:49,507 INFO L225 Difference]: With dead ends: 43 [2020-08-18 10:31:49,507 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 10:31:49,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 10:31:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 10:31:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 10:31:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 10:31:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 10:31:49,515 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 10:31:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:49,516 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 10:31:49,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 10:31:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 10:31:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 10:31:49,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:49,517 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:49,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 10:31:49,518 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 10:31:49,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:49,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637748454] [2020-08-18 10:31:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 10:31:49,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637748454] [2020-08-18 10:31:49,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:49,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 10:31:49,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673400424] [2020-08-18 10:31:49,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 10:31:49,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 10:31:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 10:31:49,777 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 10:31:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:49,944 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 10:31:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 10:31:49,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 10:31:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:49,947 INFO L225 Difference]: With dead ends: 46 [2020-08-18 10:31:49,949 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 10:31:49,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 10:31:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 10:31:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 10:31:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 10:31:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 10:31:49,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 10:31:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:49,967 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 10:31:49,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 10:31:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 10:31:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 10:31:49,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:49,971 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:49,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 10:31:49,971 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 10:31:49,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:49,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841852221] [2020-08-18 10:31:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 10:31:50,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841852221] [2020-08-18 10:31:50,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:50,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 10:31:50,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637978513] [2020-08-18 10:31:50,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 10:31:50,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 10:31:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:31:50,340 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 10:31:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:50,498 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 10:31:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 10:31:50,499 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 10:31:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:50,501 INFO L225 Difference]: With dead ends: 49 [2020-08-18 10:31:50,501 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 10:31:50,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 10:31:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 10:31:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 10:31:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 10:31:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 10:31:50,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 10:31:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:50,510 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 10:31:50,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 10:31:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 10:31:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 10:31:50,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:50,513 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:50,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 10:31:50,514 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 10:31:50,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:50,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556891031] [2020-08-18 10:31:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 10:31:50,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556891031] [2020-08-18 10:31:50,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:50,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 10:31:50,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334628079] [2020-08-18 10:31:50,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 10:31:50,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 10:31:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 10:31:50,900 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 10:31:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:51,059 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 10:31:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 10:31:51,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 10:31:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:51,060 INFO L225 Difference]: With dead ends: 52 [2020-08-18 10:31:51,061 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 10:31:51,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 10:31:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 10:31:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 10:31:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 10:31:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 10:31:51,084 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 10:31:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:51,084 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 10:31:51,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 10:31:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 10:31:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 10:31:51,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:51,086 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:51,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 10:31:51,086 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 10:31:51,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:51,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383057494] [2020-08-18 10:31:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 10:31:51,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383057494] [2020-08-18 10:31:51,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:51,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 10:31:51,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911402147] [2020-08-18 10:31:51,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 10:31:51,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:51,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 10:31:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 10:31:51,559 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 10:31:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:51,768 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 10:31:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 10:31:51,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 10:31:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:51,771 INFO L225 Difference]: With dead ends: 55 [2020-08-18 10:31:51,771 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 10:31:51,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 10:31:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 10:31:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 10:31:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 10:31:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 10:31:51,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 10:31:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:51,789 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 10:31:51,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 10:31:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 10:31:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 10:31:51,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:51,793 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:51,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 10:31:51,793 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 10:31:51,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:51,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834183432] [2020-08-18 10:31:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:51,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 10:31:52,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834183432] [2020-08-18 10:31:52,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:52,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 10:31:52,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662467265] [2020-08-18 10:31:52,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 10:31:52,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 10:31:52,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 10:31:52,309 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 10:31:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:52,503 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 10:31:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 10:31:52,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 10:31:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:52,505 INFO L225 Difference]: With dead ends: 58 [2020-08-18 10:31:52,505 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 10:31:52,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 10:31:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 10:31:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 10:31:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 10:31:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 10:31:52,521 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 10:31:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:52,522 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 10:31:52,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 10:31:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 10:31:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 10:31:52,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:52,524 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:52,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 10:31:52,525 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 10:31:52,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:52,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53984415] [2020-08-18 10:31:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 10:31:53,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53984415] [2020-08-18 10:31:53,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:53,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 10:31:53,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672974089] [2020-08-18 10:31:53,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 10:31:53,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 10:31:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:31:53,020 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 10:31:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:53,236 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 10:31:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 10:31:53,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 10:31:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:53,237 INFO L225 Difference]: With dead ends: 61 [2020-08-18 10:31:53,238 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 10:31:53,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 10:31:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 10:31:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 10:31:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 10:31:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 10:31:53,244 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 10:31:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:53,245 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 10:31:53,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 10:31:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 10:31:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 10:31:53,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:53,246 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:53,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 10:31:53,247 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 10:31:53,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:53,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314844650] [2020-08-18 10:31:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 10:31:53,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314844650] [2020-08-18 10:31:53,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:53,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 10:31:53,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226944220] [2020-08-18 10:31:53,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 10:31:53,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 10:31:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 10:31:53,802 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 10:31:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:54,071 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 10:31:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 10:31:54,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 10:31:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:54,073 INFO L225 Difference]: With dead ends: 64 [2020-08-18 10:31:54,074 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 10:31:54,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 10:31:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 10:31:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 10:31:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 10:31:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 10:31:54,091 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 10:31:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:54,093 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 10:31:54,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 10:31:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 10:31:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 10:31:54,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:54,095 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:54,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 10:31:54,096 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 10:31:54,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:54,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392200867] [2020-08-18 10:31:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 10:31:54,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392200867] [2020-08-18 10:31:54,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:54,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 10:31:54,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706334242] [2020-08-18 10:31:54,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 10:31:54,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 10:31:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 10:31:54,821 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 10:31:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:55,048 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 10:31:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 10:31:55,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 10:31:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:55,051 INFO L225 Difference]: With dead ends: 67 [2020-08-18 10:31:55,051 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 10:31:55,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 10:31:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 10:31:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 10:31:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 10:31:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 10:31:55,057 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 10:31:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 10:31:55,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 10:31:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 10:31:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 10:31:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:55,059 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:55,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 10:31:55,060 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 10:31:55,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:55,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747804782] [2020-08-18 10:31:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 10:31:55,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747804782] [2020-08-18 10:31:55,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:55,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 10:31:55,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625442607] [2020-08-18 10:31:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 10:31:55,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 10:31:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 10:31:55,756 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 10:31:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:56,031 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 10:31:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 10:31:56,031 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 10:31:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:56,033 INFO L225 Difference]: With dead ends: 70 [2020-08-18 10:31:56,033 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 10:31:56,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 10:31:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 10:31:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 10:31:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 10:31:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 10:31:56,047 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 10:31:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:56,048 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 10:31:56,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 10:31:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 10:31:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 10:31:56,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:56,049 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:56,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 10:31:56,053 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 10:31:56,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409013001] [2020-08-18 10:31:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 10:31:56,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409013001] [2020-08-18 10:31:56,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:56,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 10:31:56,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021617124] [2020-08-18 10:31:56,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 10:31:56,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:56,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 10:31:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 10:31:56,859 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 10:31:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:57,110 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 10:31:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 10:31:57,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 10:31:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:57,112 INFO L225 Difference]: With dead ends: 73 [2020-08-18 10:31:57,112 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 10:31:57,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 10:31:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 10:31:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 10:31:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 10:31:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 10:31:57,118 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 10:31:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:57,118 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 10:31:57,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 10:31:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 10:31:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 10:31:57,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:57,120 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:57,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 10:31:57,121 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 10:31:57,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:57,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682780086] [2020-08-18 10:31:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 10:31:57,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682780086] [2020-08-18 10:31:57,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:57,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 10:31:57,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348643077] [2020-08-18 10:31:57,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 10:31:57,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 10:31:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 10:31:57,938 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 10:31:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:58,202 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 10:31:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 10:31:58,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 10:31:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:58,204 INFO L225 Difference]: With dead ends: 76 [2020-08-18 10:31:58,204 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 10:31:58,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 10:31:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 10:31:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 10:31:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 10:31:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 10:31:58,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 10:31:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:58,213 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 10:31:58,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 10:31:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 10:31:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 10:31:58,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:58,214 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:58,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 10:31:58,215 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 10:31:58,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:58,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580152768] [2020-08-18 10:31:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 10:31:59,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580152768] [2020-08-18 10:31:59,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:31:59,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 10:31:59,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310796116] [2020-08-18 10:31:59,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 10:31:59,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:31:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 10:31:59,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 10:31:59,109 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 10:31:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:31:59,381 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 10:31:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 10:31:59,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 10:31:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:31:59,383 INFO L225 Difference]: With dead ends: 79 [2020-08-18 10:31:59,383 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 10:31:59,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 10:31:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 10:31:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 10:31:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 10:31:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 10:31:59,388 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 10:31:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:31:59,389 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 10:31:59,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 10:31:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 10:31:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 10:31:59,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:31:59,390 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:31:59,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 10:31:59,390 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:31:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:31:59,391 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 10:31:59,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:31:59,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67047114] [2020-08-18 10:31:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:31:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:31:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:31:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:31:59,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:31:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:01,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-18 10:32:01,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67047114] [2020-08-18 10:32:01,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:32:01,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 10:32:01,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170349687] [2020-08-18 10:32:01,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 10:32:01,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:32:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 10:32:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 10:32:01,295 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-18 10:32:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:32:02,115 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-18 10:32:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 10:32:02,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-18 10:32:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:32:02,117 INFO L225 Difference]: With dead ends: 82 [2020-08-18 10:32:02,117 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 10:32:02,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 10:32:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 10:32:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 10:32:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 10:32:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-18 10:32:02,124 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-18 10:32:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:32:02,124 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-18 10:32:02,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 10:32:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-18 10:32:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-18 10:32:02,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:32:02,125 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:32:02,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 10:32:02,126 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:32:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:32:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-18 10:32:02,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:32:02,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234616496] [2020-08-18 10:32:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:32:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:32:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 10:32:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:02,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:32:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:32:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-18 10:32:03,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234616496] [2020-08-18 10:32:03,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:32:03,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 10:32:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832712648] [2020-08-18 10:32:03,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 10:32:03,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:32:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 10:32:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-18 10:32:03,457 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-18 10:32:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:32:04,971 INFO L93 Difference]: Finished difference Result 197 states and 638 transitions. [2020-08-18 10:32:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 10:32:04,973 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-18 10:32:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:32:04,974 INFO L225 Difference]: With dead ends: 197 [2020-08-18 10:32:04,974 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 10:32:04,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1489, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 10:32:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 10:32:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 10:32:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 10:32:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 10:32:04,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-08-18 10:32:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:32:04,979 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 10:32:04,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 10:32:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 10:32:04,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 10:32:04,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 10:32:04,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 10:32:05,186 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 3 [2020-08-18 10:32:05,192 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 10:32:05,192 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 10:32:05,193 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 10:32:05,193 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 10:32:05,194 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 10:32:05,194 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 10:32:05,195 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-18 10:32:05,195 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 10:32:05,195 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 10:32:05,195 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-18 10:32:05,195 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-18 10:32:05,195 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 20) (<= 20 main_~input~0)) [2020-08-18 10:32:05,196 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-18 10:32:05,196 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-18 10:32:05,196 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-18 10:32:05,196 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-18 10:32:05,196 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-18 10:32:05,196 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-18 10:32:05,196 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 10:32:05,197 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-18 10:32:05,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:32:05 BoogieIcfgContainer [2020-08-18 10:32:05,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 10:32:05,219 INFO L168 Benchmark]: Toolchain (without parser) took 19240.04 ms. Allocated memory was 146.8 MB in the beginning and 541.1 MB in the end (delta: 394.3 MB). Free memory was 102.8 MB in the beginning and 364.2 MB in the end (delta: -261.4 MB). Peak memory consumption was 132.9 MB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,220 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.61 ms. Allocated memory is still 146.8 MB. Free memory was 102.6 MB in the beginning and 93.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,221 INFO L168 Benchmark]: Boogie Preprocessor took 120.94 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,221 INFO L168 Benchmark]: RCFGBuilder took 274.72 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,225 INFO L168 Benchmark]: TraceAbstraction took 18570.88 ms. Allocated memory was 202.4 MB in the beginning and 541.1 MB in the end (delta: 338.7 MB). Free memory was 169.1 MB in the beginning and 364.2 MB in the end (delta: -195.1 MB). Peak memory consumption was 143.6 MB. Max. memory is 7.1 GB. [2020-08-18 10:32:05,229 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.61 ms. Allocated memory is still 146.8 MB. Free memory was 102.6 MB in the beginning and 93.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.94 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.72 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18570.88 ms. Allocated memory was 202.4 MB in the beginning and 541.1 MB in the end (delta: 338.7 MB). Free memory was 169.1 MB in the beginning and 364.2 MB in the end (delta: -195.1 MB). Peak memory consumption was 143.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.2s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 657 SDslu, 3302 SDs, 0 SdLazy, 3411 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1122 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 49 PreInvPairs, 49 NumberOfFragments, 15 HoareAnnotationTreeSize, 49 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 241 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1650 ConstructedInterpolants, 0 QuantifiedInterpolants, 417408 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 5712/10164 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 correct! Received shutdown request...