/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:33,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:33,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:33,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:33,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:33,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:33,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:33,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:33,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:33,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:33,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:33,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:33,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:33,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:33,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:33,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:33,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:33,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:33,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:33,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:33,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:33,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:33,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:33,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:33,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:33,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:33,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:33,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:33,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:33,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 13:18:33,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:33,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:33,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:33,592 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 [2020-08-21 13:18:33,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:33,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:33,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:33,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:33,627 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:33,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:33,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:33,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:33,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:33,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:33,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:33,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:33,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:33,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:33,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:33,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:33,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:33,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:33,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:33,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:33,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:33,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:33,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:33,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:33,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:18:33,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:33,954 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:33,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:33,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:33,959 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:33,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-21 13:18:34,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b5ef868/18a1d8d3dce3423c9cd8aa5abcf3bb12/FLAG5bc2cd8d0 [2020-08-21 13:18:34,474 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:34,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-21 13:18:34,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b5ef868/18a1d8d3dce3423c9cd8aa5abcf3bb12/FLAG5bc2cd8d0 [2020-08-21 13:18:34,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96b5ef868/18a1d8d3dce3423c9cd8aa5abcf3bb12 [2020-08-21 13:18:34,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:34,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:34,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:34,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:34,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:34,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:34" (1/1) ... [2020-08-21 13:18:34,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac3c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:34, skipping insertion in model container [2020-08-21 13:18:34,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:34" (1/1) ... [2020-08-21 13:18:34,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:34,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:35,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:35,077 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:35,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:35,101 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:35,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35 WrapperNode [2020-08-21 13:18:35,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:35,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:35,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:35,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:35,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (1/1) ... [2020-08-21 13:18:35,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:35,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:35,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:35,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:35,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (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 [2020-08-21 13:18:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 13:18:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:18:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 13:18:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:35,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:35,409 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:35,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:35 BoogieIcfgContainer [2020-08-21 13:18:35,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:35,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:35,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:35,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:35,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:34" (1/3) ... [2020-08-21 13:18:35,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@846fca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:35, skipping insertion in model container [2020-08-21 13:18:35,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:35" (2/3) ... [2020-08-21 13:18:35,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@846fca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:35, skipping insertion in model container [2020-08-21 13:18:35,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:35" (3/3) ... [2020-08-21 13:18:35,420 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-08-21 13:18:35,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:35,437 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:35,450 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:35,473 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:35,473 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:35,473 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:35,473 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:35,474 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:35,474 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:35,474 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:35,474 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:18:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:35,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:35,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:35,494 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 13:18:35,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:35,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402112960] [2020-08-21 13:18:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:35,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:35,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402112960] [2020-08-21 13:18:35,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:35,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257382170] [2020-08-21 13:18:35,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:35,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:35,844 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 13:18:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:35,966 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 13:18:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:35,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:35,977 INFO L225 Difference]: With dead ends: 30 [2020-08-21 13:18:35,978 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:18:35,980 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 [2020-08-21 13:18:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:18:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:18:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:18:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:18:36,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 13:18:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:36,017 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:18:36,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:18:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:18:36,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:36,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:36,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:36,021 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 13:18:36,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:36,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110483177] [2020-08-21 13:18:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:18:36,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110483177] [2020-08-21 13:18:36,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:36,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:18:36,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528424035] [2020-08-21 13:18:36,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:18:36,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:18:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:36,138 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 13:18:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:36,192 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 13:18:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:18:36,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 13:18:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:36,194 INFO L225 Difference]: With dead ends: 25 [2020-08-21 13:18:36,194 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 13:18:36,195 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 [2020-08-21 13:18:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 13:18:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 13:18:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:18:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 13:18:36,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 13:18:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:36,204 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 13:18:36,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:18:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 13:18:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:18:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:36,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:36,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:36,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:36,207 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 13:18:36,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:36,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350670845] [2020-08-21 13:18:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 13:18:36,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350670845] [2020-08-21 13:18:36,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:36,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567145202] [2020-08-21 13:18:36,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:36,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:36,381 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 13:18:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:36,444 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 13:18:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:18:36,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 13:18:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:36,446 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:18:36,446 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:18:36,447 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 [2020-08-21 13:18:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:18:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 13:18:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:18:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 13:18:36,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 13:18:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:36,454 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 13:18:36,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 13:18:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:18:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:36,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:36,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:36,456 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 13:18:36,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:36,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352297056] [2020-08-21 13:18:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 13:18:36,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352297056] [2020-08-21 13:18:36,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:36,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332215135] [2020-08-21 13:18:36,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:36,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:36,606 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 13:18:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:36,693 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 13:18:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:18:36,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 13:18:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:36,705 INFO L225 Difference]: With dead ends: 31 [2020-08-21 13:18:36,705 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 13:18:36,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 13:18:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 13:18:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:18:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 13:18:36,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 13:18:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:36,714 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 13:18:36,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 13:18:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:18:36,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:36,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:36,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:36,716 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 13:18:36,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:36,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206014924] [2020-08-21 13:18:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 13:18:36,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206014924] [2020-08-21 13:18:36,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:36,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:18:36,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523068405] [2020-08-21 13:18:36,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:18:36,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:18:36,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:36,900 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 13:18:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:36,981 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 13:18:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:36,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 13:18:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:36,983 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:18:36,983 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:18:36,984 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 [2020-08-21 13:18:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:18:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 13:18:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 13:18:36,991 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 13:18:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:36,991 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 13:18:36,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:18:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 13:18:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 13:18:36,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:36,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:36,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:36,993 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 13:18:36,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:36,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852695272] [2020-08-21 13:18:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 13:18:37,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852695272] [2020-08-21 13:18:37,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:37,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:18:37,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532972566] [2020-08-21 13:18:37,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:18:37,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:18:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:37,256 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 13:18:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:37,345 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 13:18:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:18:37,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 13:18:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:37,347 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:18:37,348 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 13:18:37,348 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 [2020-08-21 13:18:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 13:18:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 13:18:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:18:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 13:18:37,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 13:18:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:37,355 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 13:18:37,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:18:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 13:18:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:18:37,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:37,357 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:37,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:18:37,357 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:37,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 13:18:37,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:37,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663481031] [2020-08-21 13:18:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 13:18:37,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663481031] [2020-08-21 13:18:37,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:37,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:37,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761818872] [2020-08-21 13:18:37,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:37,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:37,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:37,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:37,538 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 13:18:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:37,648 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 13:18:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:18:37,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 13:18:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:37,650 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:18:37,650 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:18:37,651 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 [2020-08-21 13:18:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:18:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 13:18:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 13:18:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 13:18:37,657 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 13:18:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:37,657 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 13:18:37,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 13:18:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:18:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:37,659 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:37,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:18:37,659 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 13:18:37,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:37,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733630829] [2020-08-21 13:18:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 13:18:37,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733630829] [2020-08-21 13:18:37,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:37,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:18:37,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78909448] [2020-08-21 13:18:37,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:18:37,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:18:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:37,847 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 13:18:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:37,947 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 13:18:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:37,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 13:18:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:37,949 INFO L225 Difference]: With dead ends: 43 [2020-08-21 13:18:37,949 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 13:18:37,950 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 [2020-08-21 13:18:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 13:18:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 13:18:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:18:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 13:18:37,956 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 13:18:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:37,957 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 13:18:37,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:18:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 13:18:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:18:37,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:37,958 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:37,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:18:37,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 13:18:37,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:37,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241195817] [2020-08-21 13:18:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 13:18:38,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241195817] [2020-08-21 13:18:38,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:18:38,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817807451] [2020-08-21 13:18:38,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:18:38,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:18:38,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:18:38,197 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 13:18:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,321 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 13:18:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:18:38,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 13:18:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,323 INFO L225 Difference]: With dead ends: 46 [2020-08-21 13:18:38,324 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 13:18:38,324 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 [2020-08-21 13:18:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 13:18:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 13:18:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 13:18:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 13:18:38,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 13:18:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,331 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 13:18:38,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:18:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 13:18:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:18:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,332 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:18:38,333 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 13:18:38,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438217079] [2020-08-21 13:18:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 13:18:38,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438217079] [2020-08-21 13:18:38,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:18:38,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136258638] [2020-08-21 13:18:38,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:18:38,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:18:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:38,617 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 13:18:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,761 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 13:18:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:18:38,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 13:18:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,763 INFO L225 Difference]: With dead ends: 49 [2020-08-21 13:18:38,763 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 13:18:38,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:18:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 13:18:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 13:18:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:18:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 13:18:38,769 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 13:18:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,770 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 13:18:38,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:18:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 13:18:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 13:18:38,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,771 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:18:38,772 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 13:18:38,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236202803] [2020-08-21 13:18:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 13:18:39,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236202803] [2020-08-21 13:18:39,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:18:39,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814053690] [2020-08-21 13:18:39,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:18:39,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:18:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:39,104 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 13:18:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,240 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 13:18:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:39,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 13:18:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,242 INFO L225 Difference]: With dead ends: 52 [2020-08-21 13:18:39,242 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 13:18:39,243 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 [2020-08-21 13:18:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 13:18:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 13:18:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:18:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 13:18:39,249 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 13:18:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,249 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 13:18:39,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:18:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 13:18:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 13:18:39,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,250 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:39,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:18:39,251 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 13:18:39,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649928732] [2020-08-21 13:18:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 13:18:39,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649928732] [2020-08-21 13:18:39,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:18:39,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391786890] [2020-08-21 13:18:39,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:18:39,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:18:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:18:39,727 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 13:18:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,893 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 13:18:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:18:39,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 13:18:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,894 INFO L225 Difference]: With dead ends: 55 [2020-08-21 13:18:39,894 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 13:18:39,896 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 [2020-08-21 13:18:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 13:18:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 13:18:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 13:18:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 13:18:39,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 13:18:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,907 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 13:18:39,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:18:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 13:18:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 13:18:39,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,911 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:39,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:18:39,911 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 13:18:39,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142247458] [2020-08-21 13:18:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 13:18:40,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142247458] [2020-08-21 13:18:40,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:18:40,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880180205] [2020-08-21 13:18:40,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:18:40,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:18:40,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:40,416 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 13:18:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,609 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 13:18:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:18:40,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 13:18:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,611 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:18:40,611 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:18:40,612 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 [2020-08-21 13:18:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:18:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 13:18:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:18:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 13:18:40,617 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 13:18:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,618 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 13:18:40,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:18:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 13:18:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 13:18:40,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,619 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:40,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:18:40,620 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 13:18:40,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193373121] [2020-08-21 13:18:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 13:18:41,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193373121] [2020-08-21 13:18:41,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:41,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:18:41,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060709073] [2020-08-21 13:18:41,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:18:41,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:18:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:18:41,066 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 13:18:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:41,327 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 13:18:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:18:41,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 13:18:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:41,329 INFO L225 Difference]: With dead ends: 61 [2020-08-21 13:18:41,329 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 13:18:41,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 13:18:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 13:18:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 13:18:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:18:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 13:18:41,339 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 13:18:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:41,340 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 13:18:41,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:18:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 13:18:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 13:18:41,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:41,343 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:41,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:18:41,343 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 13:18:41,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:41,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869635903] [2020-08-21 13:18:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 13:18:41,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869635903] [2020-08-21 13:18:41,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:41,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:18:41,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019619049] [2020-08-21 13:18:41,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:18:41,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:18:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:18:41,865 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 13:18:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,084 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 13:18:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:18:42,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 13:18:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,086 INFO L225 Difference]: With dead ends: 64 [2020-08-21 13:18:42,086 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 13:18:42,087 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 [2020-08-21 13:18:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 13:18:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 13:18:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 13:18:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 13:18:42,092 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 13:18:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,093 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 13:18:42,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:18:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 13:18:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 13:18:42,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,094 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:18:42,095 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 13:18:42,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135800953] [2020-08-21 13:18:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 13:18:43,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135800953] [2020-08-21 13:18:43,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 13:18:43,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410050898] [2020-08-21 13:18:43,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 13:18:43,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 13:18:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 13:18:43,282 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-21 13:18:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,772 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 13:18:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 13:18:43,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-21 13:18:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,776 INFO L225 Difference]: With dead ends: 67 [2020-08-21 13:18:43,776 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 13:18:43,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 13:18:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 13:18:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 13:18:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:18:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 13:18:43,785 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 13:18:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,786 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 13:18:43,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 13:18:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 13:18:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 13:18:43,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,790 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:18:43,790 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 13:18:43,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188477433] [2020-08-21 13:18:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 13:18:44,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188477433] [2020-08-21 13:18:44,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:44,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:18:44,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124609261] [2020-08-21 13:18:44,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:18:44,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:18:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:44,511 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 13:18:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:45,355 INFO L93 Difference]: Finished difference Result 152 states and 408 transitions. [2020-08-21 13:18:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 13:18:45,355 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 13:18:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:45,356 INFO L225 Difference]: With dead ends: 152 [2020-08-21 13:18:45,356 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:18:45,361 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 [2020-08-21 13:18:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:18:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:18:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:18:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:18:45,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-08-21 13:18:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:45,363 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:18:45,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:18:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:18:45,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:18:45,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:18:45,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:18:45,493 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:18:45,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:45,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:45,494 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:18:45,494 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:18:45,494 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:18:45,495 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 13:18:45,496 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 13:18:45,496 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:18:45,496 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 13:18:45,496 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 13:18:45,497 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-08-21 13:18:45,497 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 13:18:45,497 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:18:45,497 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 13:18:45,498 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 13:18:45,498 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 13:18:45,498 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 13:18:45,498 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 13:18:45,499 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 13:18:45,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:18:45 BoogieIcfgContainer [2020-08-21 13:18:45,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:18:45,527 INFO L168 Benchmark]: Toolchain (without parser) took 10639.06 ms. Allocated memory was 137.9 MB in the beginning and 413.1 MB in the end (delta: 275.3 MB). Free memory was 100.8 MB in the beginning and 85.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 290.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,528 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.46 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,531 INFO L168 Benchmark]: Boogie Preprocessor took 21.83 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,532 INFO L168 Benchmark]: RCFGBuilder took 287.64 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 168.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,533 INFO L168 Benchmark]: TraceAbstraction took 10101.09 ms. Allocated memory was 200.3 MB in the beginning and 413.1 MB in the end (delta: 212.9 MB). Free memory was 168.2 MB in the beginning and 85.2 MB in the end (delta: 83.0 MB). Peak memory consumption was 295.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:45,540 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 217.46 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.83 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.64 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 168.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10101.09 ms. Allocated memory was 200.3 MB in the beginning and 413.1 MB in the end (delta: 212.9 MB). Free memory was 168.2 MB in the beginning and 85.2 MB in the end (delta: 83.0 MB). Peak memory consumption was 295.9 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: 9.8s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.3s, 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, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 3.9s 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, 0.1s SatisfiabilityAnalysisTime, 5.8s 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...