/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_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:28:14,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:14,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:14,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:14,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:14,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:14,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:14,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:14,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:14,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:14,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:14,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:14,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:14,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:14,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:14,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:14,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:14,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:14,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:14,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:14,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:14,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:14,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:14,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:14,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:28:14,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:14,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:14,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:14,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:28:14,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:14,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:14,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:14,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:14,190 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:14,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:14,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:14,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:14,192 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:14,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:14,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:14,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:14,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:14,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:14,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:14,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:14,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:14,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:14,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:14,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:14,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:14,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:14,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:14,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:14,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:28:14,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:14,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:14,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:14,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:14,580 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:14,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-18 15:28:14,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c46fa7f2e/192bb7b6e40141739f230f5cf9dd92d3/FLAG078c410c2 [2020-08-18 15:28:15,130 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:15,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-18 15:28:15,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c46fa7f2e/192bb7b6e40141739f230f5cf9dd92d3/FLAG078c410c2 [2020-08-18 15:28:15,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c46fa7f2e/192bb7b6e40141739f230f5cf9dd92d3 [2020-08-18 15:28:15,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:15,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:15,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:15,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:15,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:15,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75024412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15, skipping insertion in model container [2020-08-18 15:28:15,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:15,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:15,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:15,770 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:15,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:15,797 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:15,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15 WrapperNode [2020-08-18 15:28:15,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:15,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:15,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:15,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:15,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... [2020-08-18 15:28:15,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:15,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:15,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:15,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:15,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 15:28:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 15:28:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 15:28:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:16,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:16,138 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:28:16,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:16 BoogieIcfgContainer [2020-08-18 15:28:16,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:16,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:16,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:16,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:16,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:15" (1/3) ... [2020-08-18 15:28:16,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc2d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:16, skipping insertion in model container [2020-08-18 15:28:16,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:15" (2/3) ... [2020-08-18 15:28:16,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc2d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:16, skipping insertion in model container [2020-08-18 15:28:16,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:16" (3/3) ... [2020-08-18 15:28:16,151 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-08-18 15:28:16,162 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:16,170 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:16,184 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:16,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:16,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:16,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:16,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:16,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:16,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:16,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:16,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 15:28:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:28:16,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:16,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:16,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 15:28:16,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:16,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064699784] [2020-08-18 15:28:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:16,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064699784] [2020-08-18 15:28:16,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:16,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:28:16,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16626234] [2020-08-18 15:28:16,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:28:16,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:28:16,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:28:16,567 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 15:28:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:16,620 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-18 15:28:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:28:16,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:28:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:16,634 INFO L225 Difference]: With dead ends: 32 [2020-08-18 15:28:16,634 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 15:28:16,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:28:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 15:28:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 15:28:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 15:28:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 15:28:16,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 15:28:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:16,690 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 15:28:16,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:28:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 15:28:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:16,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:16,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:16,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:28:16,693 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 15:28:16,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:16,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601025758] [2020-08-18 15:28:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 15:28:16,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601025758] [2020-08-18 15:28:16,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:16,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:28:16,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423645308] [2020-08-18 15:28:16,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:28:16,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:28:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:28:16,943 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-18 15:28:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:16,982 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 15:28:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:28:16,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-18 15:28:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:16,984 INFO L225 Difference]: With dead ends: 25 [2020-08-18 15:28:16,985 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 15:28:16,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:28:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 15:28:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 15:28:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 15:28:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 15:28:16,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 15:28:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:16,994 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 15:28:16,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:28:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 15:28:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:16,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:16,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:28:16,997 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 15:28:16,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:16,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350670845] [2020-08-18 15:28:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 15:28:17,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350670845] [2020-08-18 15:28:17,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:17,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:28:17,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960037569] [2020-08-18 15:28:17,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:28:17,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:28:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:28:17,231 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-18 15:28:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:17,273 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 15:28:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:28:17,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-18 15:28:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:17,276 INFO L225 Difference]: With dead ends: 28 [2020-08-18 15:28:17,276 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 15:28:17,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:28:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 15:28:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 15:28:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 15:28:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 15:28:17,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 15:28:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:17,286 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 15:28:17,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:28:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 15:28:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:28:17,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:17,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:17,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:28:17,289 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 15:28:17,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:17,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586328657] [2020-08-18 15:28:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 15:28:17,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586328657] [2020-08-18 15:28:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:17,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:28:17,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766877106] [2020-08-18 15:28:17,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:28:17,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:28:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:28:17,577 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-18 15:28:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:17,640 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 15:28:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:28:17,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-18 15:28:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:17,642 INFO L225 Difference]: With dead ends: 31 [2020-08-18 15:28:17,643 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 15:28:17,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:28:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 15:28:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 15:28:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 15:28:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 15:28:17,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 15:28:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:17,651 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 15:28:17,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:28:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 15:28:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 15:28:17,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:17,653 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:17,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:28:17,654 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:17,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 15:28:17,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:17,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197555772] [2020-08-18 15:28:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 15:28:17,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197555772] [2020-08-18 15:28:17,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:17,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 15:28:17,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557655918] [2020-08-18 15:28:17,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 15:28:17,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 15:28:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:28:17,946 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-18 15:28:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:18,022 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 15:28:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 15:28:18,023 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-18 15:28:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:18,024 INFO L225 Difference]: With dead ends: 34 [2020-08-18 15:28:18,025 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:28:18,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:28:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:28:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 15:28:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:28:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 15:28:18,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 15:28:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:18,033 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 15:28:18,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 15:28:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 15:28:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 15:28:18,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:18,035 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:18,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:28:18,036 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 15:28:18,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:18,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238827949] [2020-08-18 15:28:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 15:28:18,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238827949] [2020-08-18 15:28:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 15:28:18,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124428396] [2020-08-18 15:28:18,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 15:28:18,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 15:28:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:28:18,396 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-18 15:28:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:18,519 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 15:28:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:28:18,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-18 15:28:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:18,522 INFO L225 Difference]: With dead ends: 37 [2020-08-18 15:28:18,522 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 15:28:18,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:28:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 15:28:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 15:28:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 15:28:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 15:28:18,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 15:28:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:18,531 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 15:28:18,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 15:28:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 15:28:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 15:28:18,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:18,534 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:18,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:28:18,534 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 15:28:18,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:18,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394756269] [2020-08-18 15:28:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 15:28:18,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394756269] [2020-08-18 15:28:18,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:18,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 15:28:18,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914623746] [2020-08-18 15:28:18,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 15:28:18,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:18,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 15:28:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:28:18,918 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-18 15:28:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:19,040 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 15:28:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 15:28:19,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-18 15:28:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:19,042 INFO L225 Difference]: With dead ends: 40 [2020-08-18 15:28:19,042 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 15:28:19,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:28:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 15:28:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 15:28:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:28:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 15:28:19,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 15:28:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:19,050 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 15:28:19,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 15:28:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 15:28:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 15:28:19,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:19,052 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:19,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:28:19,052 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 15:28:19,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:19,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33088888] [2020-08-18 15:28:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 15:28:19,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33088888] [2020-08-18 15:28:19,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:19,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 15:28:19,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508847275] [2020-08-18 15:28:19,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 15:28:19,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 15:28:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:28:19,550 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-18 15:28:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:19,710 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 15:28:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:28:19,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-18 15:28:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:19,712 INFO L225 Difference]: With dead ends: 43 [2020-08-18 15:28:19,713 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 15:28:19,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:28:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 15:28:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 15:28:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 15:28:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 15:28:19,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 15:28:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:19,730 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 15:28:19,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 15:28:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 15:28:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 15:28:19,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:19,737 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:19,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:28:19,738 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 15:28:19,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:19,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475175062] [2020-08-18 15:28:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 15:28:20,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475175062] [2020-08-18 15:28:20,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:20,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 15:28:20,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493093723] [2020-08-18 15:28:20,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 15:28:20,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 15:28:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:28:20,405 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-18 15:28:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:20,581 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 15:28:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 15:28:20,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-18 15:28:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:20,583 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:28:20,584 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:28:20,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:28:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:28:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 15:28:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 15:28:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 15:28:20,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 15:28:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:20,592 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 15:28:20,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 15:28:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 15:28:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 15:28:20,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:20,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:20,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:28:20,594 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 15:28:20,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:20,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771818083] [2020-08-18 15:28:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 15:28:21,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771818083] [2020-08-18 15:28:21,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:21,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 15:28:21,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640475025] [2020-08-18 15:28:21,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 15:28:21,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 15:28:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:28:21,236 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-18 15:28:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:21,464 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 15:28:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 15:28:21,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-18 15:28:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:21,471 INFO L225 Difference]: With dead ends: 49 [2020-08-18 15:28:21,472 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 15:28:21,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:28:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 15:28:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 15:28:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 15:28:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 15:28:21,484 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 15:28:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:21,485 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 15:28:21,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 15:28:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 15:28:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 15:28:21,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:21,490 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:21,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:28:21,490 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:21,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 15:28:21,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:21,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329732958] [2020-08-18 15:28:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 15:28:22,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329732958] [2020-08-18 15:28:22,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:22,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 15:28:22,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155448699] [2020-08-18 15:28:22,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 15:28:22,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 15:28:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 15:28:22,320 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-18 15:28:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:22,596 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 15:28:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 15:28:22,596 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 15:28:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:22,598 INFO L225 Difference]: With dead ends: 52 [2020-08-18 15:28:22,598 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 15:28:22,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 15:28:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 15:28:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 15:28:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 15:28:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 15:28:22,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 15:28:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:22,616 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 15:28:22,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 15:28:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 15:28:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 15:28:22,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:22,619 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:22,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:28:22,619 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 15:28:22,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:22,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099397794] [2020-08-18 15:28:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 15:28:23,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099397794] [2020-08-18 15:28:23,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:23,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 15:28:23,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389992954] [2020-08-18 15:28:23,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 15:28:23,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:23,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 15:28:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 15:28:23,473 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-18 15:28:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:23,759 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 15:28:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 15:28:23,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-18 15:28:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:23,761 INFO L225 Difference]: With dead ends: 55 [2020-08-18 15:28:23,761 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 15:28:23,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 15:28:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 15:28:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 15:28:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 15:28:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 15:28:23,775 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 15:28:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:23,776 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 15:28:23,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 15:28:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 15:28:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 15:28:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:23,780 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:23,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:28:23,780 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 15:28:23,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:23,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039009720] [2020-08-18 15:28:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 15:28:24,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039009720] [2020-08-18 15:28:24,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:24,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 15:28:24,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549733352] [2020-08-18 15:28:24,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 15:28:24,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 15:28:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 15:28:24,719 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-18 15:28:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:25,031 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 15:28:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 15:28:25,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-18 15:28:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:25,033 INFO L225 Difference]: With dead ends: 58 [2020-08-18 15:28:25,033 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:28:25,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 15:28:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:28:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 15:28:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:28:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 15:28:25,040 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 15:28:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:25,040 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 15:28:25,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 15:28:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 15:28:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 15:28:25,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:25,042 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:25,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:28:25,042 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 15:28:25,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:25,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618348071] [2020-08-18 15:28:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 15:28:26,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618348071] [2020-08-18 15:28:26,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:26,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 15:28:26,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098677811] [2020-08-18 15:28:26,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 15:28:26,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 15:28:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 15:28:26,027 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-18 15:28:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:26,445 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 15:28:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 15:28:26,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-18 15:28:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:26,447 INFO L225 Difference]: With dead ends: 61 [2020-08-18 15:28:26,447 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 15:28:26,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 15:28:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 15:28:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 15:28:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 15:28:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 15:28:26,465 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 15:28:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:26,465 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 15:28:26,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 15:28:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 15:28:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 15:28:26,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:26,467 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:26,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:28:26,467 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 15:28:26,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:26,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023434233] [2020-08-18 15:28:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 15:28:27,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023434233] [2020-08-18 15:28:27,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:27,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 15:28:27,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766589335] [2020-08-18 15:28:27,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 15:28:27,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 15:28:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 15:28:27,556 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-18 15:28:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:27,937 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 15:28:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 15:28:27,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-18 15:28:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:27,938 INFO L225 Difference]: With dead ends: 64 [2020-08-18 15:28:27,938 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 15:28:27,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 15:28:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 15:28:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 15:28:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 15:28:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 15:28:27,945 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 15:28:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:27,945 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 15:28:27,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 15:28:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 15:28:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 15:28:27,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:27,947 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:27,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:28:27,947 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 15:28:27,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:27,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592781175] [2020-08-18 15:28:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 15:28:29,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592781175] [2020-08-18 15:28:29,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:29,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 15:28:29,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986280355] [2020-08-18 15:28:29,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 15:28:29,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 15:28:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 15:28:29,091 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-18 15:28:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:29,625 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 15:28:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 15:28:29,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-18 15:28:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:29,628 INFO L225 Difference]: With dead ends: 67 [2020-08-18 15:28:29,628 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 15:28:29,630 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 [2020-08-18 15:28:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 15:28:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 15:28:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 15:28:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 15:28:29,635 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 15:28:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:29,636 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 15:28:29,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 15:28:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 15:28:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 15:28:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:29,638 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:29,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:28:29,638 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 15:28:29,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:29,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383184904] [2020-08-18 15:28:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 15:28:31,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383184904] [2020-08-18 15:28:31,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:31,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 15:28:31,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844204227] [2020-08-18 15:28:31,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 15:28:31,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 15:28:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 15:28:31,169 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-18 15:28:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:31,767 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 15:28:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 15:28:31,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-18 15:28:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:31,770 INFO L225 Difference]: With dead ends: 70 [2020-08-18 15:28:31,770 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 15:28:31,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 15:28:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 15:28:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 15:28:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 15:28:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 15:28:31,776 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 15:28:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:31,777 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 15:28:31,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 15:28:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 15:28:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 15:28:31,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:31,778 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:31,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:28:31,779 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 15:28:31,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:31,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960558904] [2020-08-18 15:28:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:33,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:33,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:33,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:33,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 15:28:33,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960558904] [2020-08-18 15:28:33,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:33,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 15:28:33,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002751654] [2020-08-18 15:28:33,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 15:28:33,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 15:28:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 15:28:33,709 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-18 15:28:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:34,368 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 15:28:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 15:28:34,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-18 15:28:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:34,371 INFO L225 Difference]: With dead ends: 73 [2020-08-18 15:28:34,371 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 15:28:34,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 15:28:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 15:28:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 15:28:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 15:28:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 15:28:34,377 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 15:28:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:34,377 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 15:28:34,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 15:28:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 15:28:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 15:28:34,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:34,379 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:34,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:28:34,380 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 15:28:34,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:34,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3183041] [2020-08-18 15:28:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:34,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 15:28:35,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3183041] [2020-08-18 15:28:35,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:35,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 15:28:35,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736990532] [2020-08-18 15:28:35,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 15:28:35,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:35,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 15:28:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 15:28:35,993 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-18 15:28:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:36,732 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 15:28:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 15:28:36,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-18 15:28:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:36,734 INFO L225 Difference]: With dead ends: 76 [2020-08-18 15:28:36,735 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 15:28:36,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 15:28:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 15:28:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 15:28:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 15:28:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 15:28:36,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 15:28:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:36,741 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 15:28:36,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 15:28:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 15:28:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 15:28:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:36,742 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:36,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 15:28:36,743 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 15:28:36,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:36,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830668585] [2020-08-18 15:28:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:36,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:36,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:36,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:36,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:37,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:38,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:38,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:38,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:38,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 15:28:38,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830668585] [2020-08-18 15:28:38,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:38,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-18 15:28:38,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251670768] [2020-08-18 15:28:38,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-18 15:28:38,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:38,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-18 15:28:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 15:28:38,531 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-18 15:28:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:39,317 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 15:28:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-18 15:28:39,317 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-18 15:28:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:39,318 INFO L225 Difference]: With dead ends: 79 [2020-08-18 15:28:39,319 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 15:28:39,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 15:28:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 15:28:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 15:28:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 15:28:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 15:28:39,332 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 15:28:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:39,332 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 15:28:39,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-18 15:28:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 15:28:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 15:28:39,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:39,334 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:39,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 15:28:39,335 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 15:28:39,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:39,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466980027] [2020-08-18 15:28:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:39,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:40,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-18 15:28:41,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466980027] [2020-08-18 15:28:41,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:41,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 15:28:41,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101053606] [2020-08-18 15:28:41,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 15:28:41,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 15:28:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 15:28:41,241 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-18 15:28:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:42,069 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-18 15:28:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 15:28:42,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-18 15:28:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:42,072 INFO L225 Difference]: With dead ends: 82 [2020-08-18 15:28:42,073 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:28:42,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 15:28:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:28:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 15:28:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 15:28:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-18 15:28:42,081 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-18 15:28:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:42,083 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-18 15:28:42,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 15:28:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-18 15:28:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-18 15:28:42,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:42,090 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:42,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 15:28:42,090 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-18 15:28:42,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:42,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122409604] [2020-08-18 15:28:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-18 15:28:44,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122409604] [2020-08-18 15:28:44,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:44,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-18 15:28:44,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35195567] [2020-08-18 15:28:44,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-18 15:28:44,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-18 15:28:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 15:28:44,172 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-18 15:28:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:45,175 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-18 15:28:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-18 15:28:45,177 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-18 15:28:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:45,178 INFO L225 Difference]: With dead ends: 85 [2020-08-18 15:28:45,178 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 15:28:45,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 15:28:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 15:28:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-18 15:28:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 15:28:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-18 15:28:45,189 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-18 15:28:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:45,190 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-18 15:28:45,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-18 15:28:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-18 15:28:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-18 15:28:45,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:45,191 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:45,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 15:28:45,191 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-18 15:28:45,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:45,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938784592] [2020-08-18 15:28:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:46,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:47,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:47,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-18 15:28:47,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938784592] [2020-08-18 15:28:47,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:47,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 15:28:47,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808571130] [2020-08-18 15:28:47,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 15:28:47,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 15:28:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 15:28:47,527 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-18 15:28:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:48,554 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-18 15:28:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-18 15:28:48,554 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-18 15:28:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:48,556 INFO L225 Difference]: With dead ends: 88 [2020-08-18 15:28:48,556 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 15:28:48,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 15:28:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 15:28:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-18 15:28:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 15:28:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-18 15:28:48,562 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-18 15:28:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:48,563 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-18 15:28:48,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 15:28:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-18 15:28:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 15:28:48,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:48,564 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:48,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 15:28:48,565 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-18 15:28:48,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:48,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567663918] [2020-08-18 15:28:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:48,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:49,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:50,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-18 15:28:51,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567663918] [2020-08-18 15:28:51,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:51,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-18 15:28:51,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203800435] [2020-08-18 15:28:51,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-18 15:28:51,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-18 15:28:51,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 15:28:51,125 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-18 15:28:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:52,322 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-18 15:28:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-18 15:28:52,323 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-18 15:28:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:52,324 INFO L225 Difference]: With dead ends: 91 [2020-08-18 15:28:52,325 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 15:28:52,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 15:28:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 15:28:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-18 15:28:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 15:28:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-18 15:28:52,330 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-18 15:28:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:52,331 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-18 15:28:52,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-18 15:28:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-18 15:28:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 15:28:52,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:52,333 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 15:28:52,333 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-18 15:28:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914459274] [2020-08-18 15:28:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:52,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:53,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-18 15:28:54,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914459274] [2020-08-18 15:28:54,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:54,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-18 15:28:54,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587635433] [2020-08-18 15:28:54,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-18 15:28:54,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-18 15:28:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 15:28:54,973 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-18 15:28:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,247 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-18 15:28:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-18 15:28:56,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-18 15:28:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,250 INFO L225 Difference]: With dead ends: 94 [2020-08-18 15:28:56,250 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 15:28:56,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 15:28:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 15:28:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-18 15:28:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 15:28:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-18 15:28:56,257 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-18 15:28:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,257 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-18 15:28:56,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-18 15:28:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-18 15:28:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-18 15:28:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,259 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 15:28:56,259 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-18 15:28:56,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135402969] [2020-08-18 15:28:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-18 15:28:59,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135402969] [2020-08-18 15:28:59,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:59,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-18 15:28:59,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923603312] [2020-08-18 15:28:59,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-18 15:28:59,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-18 15:28:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 15:28:59,169 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-18 15:29:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,567 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-18 15:29:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 15:29:00,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-18 15:29:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,570 INFO L225 Difference]: With dead ends: 97 [2020-08-18 15:29:00,570 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 15:29:00,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 15:29:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 15:29:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-18 15:29:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 15:29:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-18 15:29:00,577 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-18 15:29:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,577 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-18 15:29:00,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-18 15:29:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-18 15:29:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-18 15:29:00,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,579 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 15:29:00,579 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-18 15:29:00,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016102789] [2020-08-18 15:29:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:29:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-18 15:29:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016102789] [2020-08-18 15:29:03,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:03,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-18 15:29:03,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923127492] [2020-08-18 15:29:03,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-18 15:29:03,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-18 15:29:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-18 15:29:03,672 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-18 15:29:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:05,173 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-18 15:29:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-18 15:29:05,174 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-18 15:29:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:05,175 INFO L225 Difference]: With dead ends: 100 [2020-08-18 15:29:05,176 INFO L226 Difference]: Without dead ends: 96 [2020-08-18 15:29:05,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-18 15:29:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-18 15:29:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-18 15:29:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 15:29:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-18 15:29:05,190 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-18 15:29:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:05,191 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-18 15:29:05,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-18 15:29:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-18 15:29:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-18 15:29:05,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:05,192 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:05,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 15:29:05,193 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-18 15:29:05,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:05,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93141690] [2020-08-18 15:29:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:29:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:05,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:06,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:08,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:08,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-18 15:29:08,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93141690] [2020-08-18 15:29:08,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:08,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-18 15:29:08,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307288248] [2020-08-18 15:29:08,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-18 15:29:08,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:08,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-18 15:29:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 15:29:08,620 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-18 15:29:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:10,253 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-18 15:29:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-18 15:29:10,254 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-18 15:29:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:10,255 INFO L225 Difference]: With dead ends: 103 [2020-08-18 15:29:10,255 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 15:29:10,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 15:29:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 15:29:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-18 15:29:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 15:29:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-18 15:29:10,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-18 15:29:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:10,263 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-18 15:29:10,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-18 15:29:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-18 15:29:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-18 15:29:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:10,264 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:10,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 15:29:10,265 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-18 15:29:10,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:10,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194803635] [2020-08-18 15:29:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:29:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:29:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat