/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:04:29,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:04:29,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:04:29,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:04:29,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:04:29,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:04:29,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:04:29,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:04:29,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:04:29,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:04:29,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:04:29,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:04:29,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:04:29,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:04:29,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:04:29,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:04:29,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:04:29,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:04:29,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:04:29,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:04:29,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:04:29,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:04:29,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:04:29,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:04:29,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:04:29,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:04:29,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:04:29,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:04:29,547 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 17:04:29,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:04:29,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:04:29,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:04:29,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:04:29,571 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:04:29,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:04:29,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:04:29,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:04:29,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:04:29,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:04:29,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:04:29,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:04:29,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:04:29,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:04:29,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:04:29,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:04:29,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:04:29,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:04:29,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:04:29,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:04:29,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:04:29,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:04:29,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:04:29,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:04:29,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:04:29,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:04:29,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:04:29,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:04:29,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:04:29,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:04:29,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:04:29,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:04:29,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:04:29,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:04:29,911 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:04:29,911 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-18 17:04:29,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86096912/795fa9f4ab264788a85602b0bec60210/FLAG715f70a03 [2020-08-18 17:04:30,408 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:04:30,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-18 17:04:30,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86096912/795fa9f4ab264788a85602b0bec60210/FLAG715f70a03 [2020-08-18 17:04:30,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86096912/795fa9f4ab264788a85602b0bec60210 [2020-08-18 17:04:30,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:04:30,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:04:30,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:30,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:04:30,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:04:30,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:30" (1/1) ... [2020-08-18 17:04:30,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:30, skipping insertion in model container [2020-08-18 17:04:30,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:30" (1/1) ... [2020-08-18 17:04:30,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:04:30,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:04:30,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:31,000 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:04:31,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:31,027 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:04:31,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31 WrapperNode [2020-08-18 17:04:31,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:31,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:04:31,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:04:31,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:04:31,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (1/1) ... [2020-08-18 17:04:31,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:04:31,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:04:31,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:04:31,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:04:31,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (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 17:04:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:04:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:04:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 17:04:31,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:04:31,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:04:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:04:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 17:04:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:04:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:04:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:04:31,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:04:31,356 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:04:31,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:31 BoogieIcfgContainer [2020-08-18 17:04:31,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:04:31,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:04:31,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:04:31,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:04:31,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:04:30" (1/3) ... [2020-08-18 17:04:31,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89fafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:31, skipping insertion in model container [2020-08-18 17:04:31,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:31" (2/3) ... [2020-08-18 17:04:31,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89fafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:31, skipping insertion in model container [2020-08-18 17:04:31,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:31" (3/3) ... [2020-08-18 17:04:31,369 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-08-18 17:04:31,380 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:04:31,387 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:04:31,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:04:31,427 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:04:31,428 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:04:31,428 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:04:31,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:04:31,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:04:31,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:04:31,429 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:04:31,429 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:04:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 17:04:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 17:04:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:31,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:31,456 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 17:04:31,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:31,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493712646] [2020-08-18 17:04:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:31,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:31,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:31,788 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 17:04:31,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493712646] [2020-08-18 17:04:31,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:04:31,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:04:31,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695073611] [2020-08-18 17:04:31,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:04:31,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:04:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:04:31,820 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 17:04:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:31,938 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 17:04:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:04:31,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 17:04:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:31,952 INFO L225 Difference]: With dead ends: 30 [2020-08-18 17:04:31,953 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 17:04:31,957 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 17:04:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 17:04:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 17:04:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 17:04:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 17:04:32,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 17:04:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:32,025 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 17:04:32,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:04:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 17:04:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:04:32,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:32,035 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 17:04:32,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:04:32,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 17:04:32,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:32,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251962706] [2020-08-18 17:04:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,264 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 17:04:32,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251962706] [2020-08-18 17:04:32,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:32,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:04:32,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331838632] [2020-08-18 17:04:32,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:04:32,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:04:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:04:32,269 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 17:04:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:32,325 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 17:04:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:04:32,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 17:04:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:32,328 INFO L225 Difference]: With dead ends: 25 [2020-08-18 17:04:32,328 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 17:04:32,329 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 17:04:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 17:04:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 17:04:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:04:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 17:04:32,337 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 17:04:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:32,337 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 17:04:32,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:04:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 17:04:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:04:32,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:32,339 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 17:04:32,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:04:32,340 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 17:04:32,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:32,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630459262] [2020-08-18 17:04:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,554 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 17:04:32,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630459262] [2020-08-18 17:04:32,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:32,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:04:32,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561171287] [2020-08-18 17:04:32,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:04:32,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:32,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:04:32,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:04:32,557 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 17:04:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:32,634 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 17:04:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:04:32,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 17:04:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:32,636 INFO L225 Difference]: With dead ends: 28 [2020-08-18 17:04:32,636 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 17:04:32,637 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 17:04:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 17:04:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 17:04:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:04:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 17:04:32,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 17:04:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:32,645 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 17:04:32,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:04:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 17:04:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:04:32,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:32,646 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 17:04:32,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:04:32,647 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 17:04:32,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:32,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965344981] [2020-08-18 17:04:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:32,847 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 17:04:32,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965344981] [2020-08-18 17:04:32,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:32,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:04:32,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258176155] [2020-08-18 17:04:32,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:04:32,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:04:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:04:32,850 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 17:04:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:32,951 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 17:04:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:04:32,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 17:04:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:32,953 INFO L225 Difference]: With dead ends: 31 [2020-08-18 17:04:32,954 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 17:04:32,955 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 17:04:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 17:04:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 17:04:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 17:04:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 17:04:32,962 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 17:04:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:32,963 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 17:04:32,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:04:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 17:04:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:04:32,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:32,965 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 17:04:32,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:04:32,965 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 17:04:32,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:32,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236097137] [2020-08-18 17:04:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,161 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 17:04:33,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236097137] [2020-08-18 17:04:33,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:33,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:04:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18908053] [2020-08-18 17:04:33,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:04:33,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:04:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:04:33,165 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 17:04:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:33,257 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 17:04:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:04:33,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 17:04:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:33,260 INFO L225 Difference]: With dead ends: 34 [2020-08-18 17:04:33,260 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 17:04:33,261 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 17:04:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 17:04:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 17:04:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:04:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 17:04:33,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 17:04:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:33,270 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 17:04:33,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:04:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 17:04:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 17:04:33,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:33,272 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 17:04:33,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:04:33,272 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 17:04:33,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:33,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701832278] [2020-08-18 17:04:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,456 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 17:04:33,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701832278] [2020-08-18 17:04:33,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:33,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:04:33,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983026315] [2020-08-18 17:04:33,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:04:33,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:33,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:04:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:04:33,459 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 17:04:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:33,553 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 17:04:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:04:33,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 17:04:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:33,555 INFO L225 Difference]: With dead ends: 37 [2020-08-18 17:04:33,555 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 17:04:33,556 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 17:04:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 17:04:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 17:04:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 17:04:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 17:04:33,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 17:04:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:33,564 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 17:04:33,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:04:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 17:04:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 17:04:33,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:33,566 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 17:04:33,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:04:33,567 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 17:04:33,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:33,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635513301] [2020-08-18 17:04:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:33,838 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 17:04:33,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635513301] [2020-08-18 17:04:33,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:33,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:04:33,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377686060] [2020-08-18 17:04:33,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:04:33,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:04:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:04:33,843 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 17:04:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:33,971 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 17:04:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:04:33,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 17:04:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:33,973 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:04:33,973 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:04:33,974 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 17:04:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:04:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 17:04:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 17:04:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 17:04:33,981 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 17:04:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:33,982 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 17:04:33,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:04:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 17:04:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 17:04:33,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:33,983 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 17:04:33,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:04:33,984 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 17:04:33,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:33,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219970133] [2020-08-18 17:04:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,191 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 17:04:34,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219970133] [2020-08-18 17:04:34,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:34,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:04:34,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101903860] [2020-08-18 17:04:34,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:04:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:04:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:04:34,194 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 17:04:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:34,311 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 17:04:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:04:34,312 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 17:04:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:34,314 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:04:34,314 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 17:04:34,315 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 17:04:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 17:04:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 17:04:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:04:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 17:04:34,328 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 17:04:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:34,328 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 17:04:34,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:04:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 17:04:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:04:34,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:34,330 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 17:04:34,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:04:34,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 17:04:34,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:34,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073894594] [2020-08-18 17:04:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,589 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 17:04:34,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073894594] [2020-08-18 17:04:34,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:34,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:04:34,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052210995] [2020-08-18 17:04:34,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:04:34,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:04:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:04:34,592 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 17:04:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:34,746 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 17:04:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:04:34,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 17:04:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:34,748 INFO L225 Difference]: With dead ends: 46 [2020-08-18 17:04:34,748 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:04:34,749 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 17:04:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:04:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 17:04:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:04:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 17:04:34,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 17:04:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:34,762 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 17:04:34,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:04:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 17:04:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 17:04:34,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:34,766 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 17:04:34,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:04:34,766 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:34,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 17:04:34,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:34,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136158714] [2020-08-18 17:04:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:34,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,068 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 17:04:35,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136158714] [2020-08-18 17:04:35,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:35,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:04:35,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884369135] [2020-08-18 17:04:35,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:04:35,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:35,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:04:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:04:35,071 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 17:04:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:35,228 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 17:04:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:04:35,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 17:04:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:35,230 INFO L225 Difference]: With dead ends: 49 [2020-08-18 17:04:35,230 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 17:04:35,231 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 17:04:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 17:04:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 17:04:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:04:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 17:04:35,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 17:04:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:35,238 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 17:04:35,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:04:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 17:04:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 17:04:35,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:35,239 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 17:04:35,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:04:35,240 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 17:04:35,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:35,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985723825] [2020-08-18 17:04:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,549 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 17:04:35,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985723825] [2020-08-18 17:04:35,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:35,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:04:35,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952791019] [2020-08-18 17:04:35,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:04:35,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:04:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:04:35,552 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 17:04:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:35,700 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 17:04:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:04:35,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 17:04:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:35,702 INFO L225 Difference]: With dead ends: 52 [2020-08-18 17:04:35,702 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:04:35,703 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 17:04:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:04:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 17:04:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:04:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 17:04:35,710 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 17:04:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:35,710 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 17:04:35,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:04:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 17:04:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:04:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:35,712 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 17:04:35,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:04:35,712 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 17:04:35,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:35,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125013869] [2020-08-18 17:04:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:35,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,126 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 17:04:36,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125013869] [2020-08-18 17:04:36,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:36,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:04:36,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254534152] [2020-08-18 17:04:36,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:04:36,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:04:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:04:36,129 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 17:04:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:36,295 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 17:04:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:04:36,296 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 17:04:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:36,297 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:04:36,297 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:04:36,298 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 17:04:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:04:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 17:04:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 17:04:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 17:04:36,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 17:04:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:36,304 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 17:04:36,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:04:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 17:04:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 17:04:36,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:36,306 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 17:04:36,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:04:36,306 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:36,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 17:04:36,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:36,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004565977] [2020-08-18 17:04:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:36,872 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 17:04:36,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004565977] [2020-08-18 17:04:36,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:36,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:04:36,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372219079] [2020-08-18 17:04:36,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:04:36,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:04:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:04:36,876 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 17:04:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:37,078 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 17:04:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:04:37,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 17:04:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:37,079 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:04:37,080 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:04:37,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:04:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:04:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 17:04:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 17:04:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 17:04:37,090 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 17:04:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:37,090 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 17:04:37,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:04:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 17:04:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 17:04:37,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:37,093 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 17:04:37,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:04:37,093 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 17:04:37,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:37,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056295571] [2020-08-18 17:04:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,729 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 17:04:37,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056295571] [2020-08-18 17:04:37,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:37,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:04:37,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562739516] [2020-08-18 17:04:37,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:04:37,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:04:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:04:37,732 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 17:04:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:37,941 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 17:04:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:04:37,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 17:04:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:37,944 INFO L225 Difference]: With dead ends: 61 [2020-08-18 17:04:37,944 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 17:04:37,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 17:04:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 17:04:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 17:04:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 17:04:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 17:04:37,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 17:04:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:37,954 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 17:04:37,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 17:04:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 17:04:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 17:04:37,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:37,955 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 17:04:37,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:04:37,956 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 17:04:37,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:37,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231579393] [2020-08-18 17:04:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:37,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,505 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 17:04:38,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231579393] [2020-08-18 17:04:38,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:38,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:04:38,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57292367] [2020-08-18 17:04:38,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:04:38,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:38,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:04:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:04:38,509 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 17:04:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:38,718 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 17:04:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:04:38,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 17:04:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:38,720 INFO L225 Difference]: With dead ends: 64 [2020-08-18 17:04:38,720 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:04:38,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 17:04:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:04:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 17:04:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 17:04:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 17:04:38,728 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 17:04:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:38,728 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 17:04:38,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:04:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 17:04:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 17:04:38,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:38,730 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 17:04:38,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:04:38,730 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 17:04:38,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:38,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480305613] [2020-08-18 17:04:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:38,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:39,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,098 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 17:04:40,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480305613] [2020-08-18 17:04:40,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:40,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 17:04:40,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261584525] [2020-08-18 17:04:40,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 17:04:40,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:40,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 17:04:40,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:04:40,101 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-18 17:04:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:40,589 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 17:04:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 17:04:40,590 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-18 17:04:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:40,593 INFO L225 Difference]: With dead ends: 67 [2020-08-18 17:04:40,593 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 17:04:40,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:04:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 17:04:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 17:04:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 17:04:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 17:04:40,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 17:04:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:40,606 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 17:04:40,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 17:04:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 17:04:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 17:04:40,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:40,611 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 17:04:40,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:04:40,612 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 17:04:40,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:40,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943200722] [2020-08-18 17:04:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 17:04:41,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943200722] [2020-08-18 17:04:41,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:41,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:04:41,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541285249] [2020-08-18 17:04:41,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:04:41,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:04:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:04:41,293 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 17:04:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:42,243 INFO L93 Difference]: Finished difference Result 152 states and 408 transitions. [2020-08-18 17:04:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 17:04:42,244 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 17:04:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:42,245 INFO L225 Difference]: With dead ends: 152 [2020-08-18 17:04:42,245 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:04:42,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=939, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 17:04:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:04:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:04:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:04:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:04:42,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-08-18 17:04:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:42,252 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:04:42,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:04:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:04:42,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:04:42,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:04:42,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:04:42,384 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:04:42,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:04:42,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:04:42,385 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:04:42,385 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:04:42,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:04:42,385 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-18 17:04:42,386 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 17:04:42,386 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 17:04:42,386 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-18 17:04:42,386 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-18 17:04:42,386 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-08-18 17:04:42,386 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-18 17:04:42,386 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-18 17:04:42,387 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-18 17:04:42,387 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-18 17:04:42,387 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-18 17:04:42,387 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-18 17:04:42,387 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 17:04:42,387 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-18 17:04:42,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:04:42 BoogieIcfgContainer [2020-08-18 17:04:42,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:04:42,396 INFO L168 Benchmark]: Toolchain (without parser) took 11600.48 ms. Allocated memory was 140.0 MB in the beginning and 412.6 MB in the end (delta: 272.6 MB). Free memory was 103.0 MB in the beginning and 375.5 MB in the end (delta: -272.5 MB). Peak memory consumption was 247.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,397 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.64 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,399 INFO L168 Benchmark]: Boogie Preprocessor took 25.75 ms. Allocated memory is still 140.0 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,399 INFO L168 Benchmark]: RCFGBuilder took 306.43 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 172.1 MB in the end (delta: -79.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,400 INFO L168 Benchmark]: TraceAbstraction took 11032.07 ms. Allocated memory was 203.9 MB in the beginning and 412.6 MB in the end (delta: 208.7 MB). Free memory was 171.4 MB in the beginning and 375.5 MB in the end (delta: -204.0 MB). Peak memory consumption was 251.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:42,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.64 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.75 ms. Allocated memory is still 140.0 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.43 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 172.1 MB in the end (delta: -79.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11032.07 ms. Allocated memory was 203.9 MB in the beginning and 412.6 MB in the end (delta: 208.7 MB). Free memory was 171.4 MB in the beginning and 375.5 MB in the end (delta: -204.0 MB). Peak memory consumption was 251.6 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: 10.8s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 284 SDtfs, 396 SDslu, 2152 SDs, 0 SdLazy, 2096 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 39 PreInvPairs, 39 NumberOfFragments, 15 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 181 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1037 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1020 ConstructedInterpolants, 0 QuantifiedInterpolants, 203208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 2672/4624 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...