/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:56:32,431 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 06:56:32,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:56:32,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:56:32,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:56:32,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:56:32,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:56:32,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:56:32,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:56:32,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:56:32,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:56:32,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:56:32,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:56:32,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:56:32,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:56:32,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:56:32,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:56:32,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:56:32,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:56:32,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:56:32,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:56:32,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:56:32,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:56:32,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:56:32,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:56:32,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:56:32,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:56:32,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:56:32,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:56:32,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:56:32,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:56:32,516 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:56:32,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:56:32,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:56:32,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:56:32,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:56:32,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:56:32,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:56:32,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:56:32,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:56:32,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:56:32,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:56:32,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:56:32,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:56:32,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:56:32,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:56:32,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:56:32,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:56:32,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:32,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:56:32,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:56:32,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:56:32,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:56:32,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:56:32,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:56:32,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:56:32,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:56:32,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:56:32,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:56:32,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:56:32,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:56:32,811 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:56:32,812 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-19 06:56:32,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/616050323/253d9b4cdbe74845bb068fab05385d42/FLAG7ebdaa203 [2020-08-19 06:56:33,312 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:56:33,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-19 06:56:33,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/616050323/253d9b4cdbe74845bb068fab05385d42/FLAG7ebdaa203 [2020-08-19 06:56:33,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/616050323/253d9b4cdbe74845bb068fab05385d42 [2020-08-19 06:56:33,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:56:33,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:56:33,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:33,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:56:33,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:56:33,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:33" (1/1) ... [2020-08-19 06:56:33,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19701add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:33, skipping insertion in model container [2020-08-19 06:56:33,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:33" (1/1) ... [2020-08-19 06:56:33,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:56:33,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:56:34,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:34,025 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:56:34,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:34,053 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:56:34,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34 WrapperNode [2020-08-19 06:56:34,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:34,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:56:34,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:56:34,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:56:34,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... [2020-08-19 06:56:34,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:56:34,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:56:34,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:56:34,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:56:34,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:56:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:56:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 06:56:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:56:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:56:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:56:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 06:56:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 06:56:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:56:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:56:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:56:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:56:34,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:56:34,417 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:56:34,417 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-19 06:56:34,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:34 BoogieIcfgContainer [2020-08-19 06:56:34,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:56:34,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:56:34,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:56:34,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:56:34,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:56:33" (1/3) ... [2020-08-19 06:56:34,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2612e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:34, skipping insertion in model container [2020-08-19 06:56:34,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:34" (2/3) ... [2020-08-19 06:56:34,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2612e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:34, skipping insertion in model container [2020-08-19 06:56:34,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:34" (3/3) ... [2020-08-19 06:56:34,429 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-08-19 06:56:34,444 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:56:34,453 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:56:34,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:56:34,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:56:34,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:56:34,554 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:56:34,554 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:56:34,554 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:56:34,555 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:56:34,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:56:34,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:56:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-19 06:56:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 06:56:34,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:34,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:34,590 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 317368997, now seen corresponding path program 1 times [2020-08-19 06:56:34,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:34,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715148624] [2020-08-19 06:56:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:34,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:34,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715148624] [2020-08-19 06:56:34,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:34,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 06:56:34,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787894879] [2020-08-19 06:56:34,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 06:56:34,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 06:56:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 06:56:34,785 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-19 06:56:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:34,805 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-08-19 06:56:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 06:56:34,806 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-19 06:56:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:34,814 INFO L225 Difference]: With dead ends: 47 [2020-08-19 06:56:34,815 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 06:56:34,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 06:56:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 06:56:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-19 06:56:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-19 06:56:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-19 06:56:34,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-08-19 06:56:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:34,857 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-19 06:56:34,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 06:56:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-19 06:56:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:56:34,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:34,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:34,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:56:34,859 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1632722591, now seen corresponding path program 1 times [2020-08-19 06:56:34,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:34,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011521762] [2020-08-19 06:56:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:35,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011521762] [2020-08-19 06:56:35,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:35,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:56:35,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155035829] [2020-08-19 06:56:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:35,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:35,049 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-19 06:56:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:35,105 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-08-19 06:56:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:35,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-19 06:56:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:35,108 INFO L225 Difference]: With dead ends: 31 [2020-08-19 06:56:35,108 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 06:56:35,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 06:56:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-19 06:56:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 06:56:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-19 06:56:35,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-08-19 06:56:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:35,119 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-19 06:56:35,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-19 06:56:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:56:35,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:35,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:35,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:56:35,121 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1401298672, now seen corresponding path program 1 times [2020-08-19 06:56:35,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:35,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198776131] [2020-08-19 06:56:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-19 06:56:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:35,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198776131] [2020-08-19 06:56:35,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:35,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:56:35,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337446729] [2020-08-19 06:56:35,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:35,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:35,230 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-19 06:56:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:35,345 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-08-19 06:56:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:56:35,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-08-19 06:56:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:35,350 INFO L225 Difference]: With dead ends: 49 [2020-08-19 06:56:35,350 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 06:56:35,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 06:56:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-08-19 06:56:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:56:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-19 06:56:35,376 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-08-19 06:56:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:35,376 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-19 06:56:35,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-19 06:56:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:56:35,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:35,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:35,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:56:35,379 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1107622837, now seen corresponding path program 1 times [2020-08-19 06:56:35,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:35,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271376024] [2020-08-19 06:56:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 06:56:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:35,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271376024] [2020-08-19 06:56:35,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:35,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:56:35,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703202924] [2020-08-19 06:56:35,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:35,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:35,475 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-08-19 06:56:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:35,608 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-08-19 06:56:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:35,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 06:56:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:35,611 INFO L225 Difference]: With dead ends: 55 [2020-08-19 06:56:35,611 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 06:56:35,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 06:56:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-08-19 06:56:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 06:56:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-19 06:56:35,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-19 06:56:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:35,620 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-19 06:56:35,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-19 06:56:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:56:35,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:35,622 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:35,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:56:35,623 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1590427366, now seen corresponding path program 2 times [2020-08-19 06:56:35,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:35,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854552836] [2020-08-19 06:56:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:35,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854552836] [2020-08-19 06:56:35,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:35,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:56:35,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634869568] [2020-08-19 06:56:35,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:35,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:35,731 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-08-19 06:56:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:35,789 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-08-19 06:56:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:35,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-19 06:56:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:35,791 INFO L225 Difference]: With dead ends: 47 [2020-08-19 06:56:35,791 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 06:56:35,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 06:56:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-19 06:56:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 06:56:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-08-19 06:56:35,800 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 29 [2020-08-19 06:56:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:35,801 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-08-19 06:56:35,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-08-19 06:56:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:56:35,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:35,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:35,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:56:35,804 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -30298372, now seen corresponding path program 3 times [2020-08-19 06:56:35,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:35,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598449495] [2020-08-19 06:56:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:56:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 06:56:35,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598449495] [2020-08-19 06:56:35,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:35,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:35,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608267732] [2020-08-19 06:56:35,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:35,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:35,921 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-08-19 06:56:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:36,051 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-08-19 06:56:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:36,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-08-19 06:56:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:36,054 INFO L225 Difference]: With dead ends: 83 [2020-08-19 06:56:36,054 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 06:56:36,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:56:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 06:56:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-08-19 06:56:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 06:56:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 06:56:36,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 45 [2020-08-19 06:56:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:36,063 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 06:56:36,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 06:56:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 06:56:36,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:36,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:36,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:56:36,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 130155809, now seen corresponding path program 4 times [2020-08-19 06:56:36,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:36,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205532589] [2020-08-19 06:56:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 06:56:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 06:56:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:56:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 06:56:36,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205532589] [2020-08-19 06:56:36,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:36,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:56:36,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516216311] [2020-08-19 06:56:36,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:56:36,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:56:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:36,190 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2020-08-19 06:56:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:36,335 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-08-19 06:56:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:36,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-08-19 06:56:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:36,337 INFO L225 Difference]: With dead ends: 87 [2020-08-19 06:56:36,337 INFO L226 Difference]: Without dead ends: 64 [2020-08-19 06:56:36,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:56:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-19 06:56:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-19 06:56:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:56:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-08-19 06:56:36,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 47 [2020-08-19 06:56:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:36,346 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-08-19 06:56:36,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:56:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-08-19 06:56:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 06:56:36,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:36,348 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:36,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:56:36,348 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash -292198906, now seen corresponding path program 5 times [2020-08-19 06:56:36,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:36,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355362113] [2020-08-19 06:56:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 06:56:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 06:56:36,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355362113] [2020-08-19 06:56:36,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:36,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:36,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155002576] [2020-08-19 06:56:36,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:36,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:36,457 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 9 states. [2020-08-19 06:56:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:36,531 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-08-19 06:56:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:36,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-08-19 06:56:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:36,533 INFO L225 Difference]: With dead ends: 63 [2020-08-19 06:56:36,533 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 06:56:36,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 06:56:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-19 06:56:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 06:56:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-08-19 06:56:36,543 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 49 [2020-08-19 06:56:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:36,543 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-08-19 06:56:36,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-08-19 06:56:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 06:56:36,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:36,545 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:36,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:56:36,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 551795688, now seen corresponding path program 6 times [2020-08-19 06:56:36,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:36,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180625470] [2020-08-19 06:56:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 06:56:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 06:56:36,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180625470] [2020-08-19 06:56:36,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:36,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:56:36,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626464170] [2020-08-19 06:56:36,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:56:36,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:56:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:56:36,707 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 13 states. [2020-08-19 06:56:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:36,879 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-08-19 06:56:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:56:36,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-08-19 06:56:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:36,881 INFO L225 Difference]: With dead ends: 115 [2020-08-19 06:56:36,881 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 06:56:36,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:56:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 06:56:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-08-19 06:56:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 06:56:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-08-19 06:56:36,890 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 65 [2020-08-19 06:56:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:36,890 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-08-19 06:56:36,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:56:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-08-19 06:56:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 06:56:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:36,892 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:36,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:56:36,892 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -150434419, now seen corresponding path program 7 times [2020-08-19 06:56:36,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:36,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250469066] [2020-08-19 06:56:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:56:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:56:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:56:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:56:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:56:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 06:56:37,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250469066] [2020-08-19 06:56:37,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:37,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:56:37,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548118488] [2020-08-19 06:56:37,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:56:37,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:56:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:56:37,043 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 14 states. [2020-08-19 06:56:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:37,254 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-08-19 06:56:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:56:37,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 06:56:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:37,256 INFO L225 Difference]: With dead ends: 119 [2020-08-19 06:56:37,256 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 06:56:37,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:56:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 06:56:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-08-19 06:56:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 06:56:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-08-19 06:56:37,265 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 67 [2020-08-19 06:56:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:37,266 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-08-19 06:56:37,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:56:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-08-19 06:56:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 06:56:37,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:37,267 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:37,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:56:37,268 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -683701774, now seen corresponding path program 8 times [2020-08-19 06:56:37,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:37,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643131180] [2020-08-19 06:56:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:56:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 06:56:37,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643131180] [2020-08-19 06:56:37,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:37,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:56:37,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417909450] [2020-08-19 06:56:37,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:56:37,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:56:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:37,397 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2020-08-19 06:56:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:37,481 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-08-19 06:56:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:56:37,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-08-19 06:56:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:37,483 INFO L225 Difference]: With dead ends: 79 [2020-08-19 06:56:37,484 INFO L226 Difference]: Without dead ends: 77 [2020-08-19 06:56:37,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:56:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-19 06:56:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-19 06:56:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 06:56:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-08-19 06:56:37,492 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 69 [2020-08-19 06:56:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:37,493 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-08-19 06:56:37,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:56:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-08-19 06:56:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 06:56:37,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:37,494 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:37,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:56:37,495 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 192972756, now seen corresponding path program 9 times [2020-08-19 06:56:37,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:37,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910920938] [2020-08-19 06:56:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:56:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 06:56:37,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910920938] [2020-08-19 06:56:37,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:37,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:56:37,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150374234] [2020-08-19 06:56:37,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:56:37,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:56:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:56:37,751 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 17 states. [2020-08-19 06:56:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:37,977 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-08-19 06:56:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:56:37,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 06:56:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:37,980 INFO L225 Difference]: With dead ends: 147 [2020-08-19 06:56:37,989 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 06:56:37,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:56:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 06:56:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-08-19 06:56:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 06:56:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-08-19 06:56:38,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 85 [2020-08-19 06:56:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:38,002 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-08-19 06:56:38,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:56:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-08-19 06:56:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 06:56:38,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:38,005 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:38,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:56:38,006 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1722356985, now seen corresponding path program 10 times [2020-08-19 06:56:38,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:38,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735172109] [2020-08-19 06:56:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 06:56:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:56:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:56:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:56:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:56:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 06:56:38,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735172109] [2020-08-19 06:56:38,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:38,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:56:38,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605660047] [2020-08-19 06:56:38,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:56:38,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:56:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:56:38,247 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 18 states. [2020-08-19 06:56:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:38,551 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-08-19 06:56:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:56:38,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-08-19 06:56:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:38,554 INFO L225 Difference]: With dead ends: 151 [2020-08-19 06:56:38,554 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 06:56:38,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:56:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 06:56:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-08-19 06:56:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 06:56:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-08-19 06:56:38,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 87 [2020-08-19 06:56:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:38,569 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-08-19 06:56:38,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:56:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-08-19 06:56:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 06:56:38,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:38,571 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:38,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:56:38,572 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1713181474, now seen corresponding path program 11 times [2020-08-19 06:56:38,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:38,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375029427] [2020-08-19 06:56:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 86 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 06:56:38,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375029427] [2020-08-19 06:56:38,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:38,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:56:38,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739081777] [2020-08-19 06:56:38,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:56:38,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:56:38,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:56:38,756 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 13 states. [2020-08-19 06:56:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:38,892 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-08-19 06:56:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:56:38,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-08-19 06:56:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:38,895 INFO L225 Difference]: With dead ends: 95 [2020-08-19 06:56:38,895 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 06:56:38,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:56:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 06:56:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-08-19 06:56:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-19 06:56:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-08-19 06:56:38,902 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 89 [2020-08-19 06:56:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:38,903 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-08-19 06:56:38,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:56:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-08-19 06:56:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-19 06:56:38,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:38,904 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:38,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:56:38,905 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1950838080, now seen corresponding path program 12 times [2020-08-19 06:56:38,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:38,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831926399] [2020-08-19 06:56:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 180 proven. 72 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-19 06:56:39,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831926399] [2020-08-19 06:56:39,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:39,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:56:39,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555671209] [2020-08-19 06:56:39,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:56:39,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:56:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:56:39,170 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 21 states. [2020-08-19 06:56:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:39,513 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2020-08-19 06:56:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:56:39,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-08-19 06:56:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:39,516 INFO L225 Difference]: With dead ends: 179 [2020-08-19 06:56:39,516 INFO L226 Difference]: Without dead ends: 130 [2020-08-19 06:56:39,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:56:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-19 06:56:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2020-08-19 06:56:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-19 06:56:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-08-19 06:56:39,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 105 [2020-08-19 06:56:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:39,529 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-08-19 06:56:39,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:56:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-08-19 06:56:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 06:56:39,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:39,531 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:39,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:56:39,531 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash -734782619, now seen corresponding path program 13 times [2020-08-19 06:56:39,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:39,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517687362] [2020-08-19 06:56:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:56:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:56:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:56:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:56:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:56:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:56:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:56:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:56:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:56:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-19 06:56:39,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517687362] [2020-08-19 06:56:39,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:39,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:56:39,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854128496] [2020-08-19 06:56:39,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:56:39,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:56:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:56:39,838 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 22 states. [2020-08-19 06:56:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:40,238 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2020-08-19 06:56:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:56:40,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 06:56:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:40,240 INFO L225 Difference]: With dead ends: 183 [2020-08-19 06:56:40,241 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 06:56:40,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2020-08-19 06:56:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 06:56:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-08-19 06:56:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 06:56:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-08-19 06:56:40,250 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 107 [2020-08-19 06:56:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:40,250 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-08-19 06:56:40,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:56:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-08-19 06:56:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 06:56:40,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:40,252 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:40,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:56:40,252 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -336589110, now seen corresponding path program 14 times [2020-08-19 06:56:40,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:40,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227122381] [2020-08-19 06:56:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 128 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-19 06:56:40,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227122381] [2020-08-19 06:56:40,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:40,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:56:40,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438515926] [2020-08-19 06:56:40,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:56:40,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:56:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:56:40,442 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 15 states. [2020-08-19 06:56:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:40,587 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-19 06:56:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:56:40,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-08-19 06:56:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:40,589 INFO L225 Difference]: With dead ends: 111 [2020-08-19 06:56:40,589 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 06:56:40,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:56:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 06:56:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-08-19 06:56:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 06:56:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-08-19 06:56:40,597 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 109 [2020-08-19 06:56:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:40,598 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-08-19 06:56:40,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:56:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-08-19 06:56:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 06:56:40,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:40,599 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:40,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:56:40,600 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1711037612, now seen corresponding path program 15 times [2020-08-19 06:56:40,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:40,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877106011] [2020-08-19 06:56:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:56:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:56:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 264 proven. 110 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-19 06:56:40,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877106011] [2020-08-19 06:56:40,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:40,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:56:40,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754439866] [2020-08-19 06:56:40,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:56:40,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:56:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:56:40,996 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 25 states. [2020-08-19 06:56:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:41,484 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-08-19 06:56:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:56:41,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-08-19 06:56:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:41,487 INFO L225 Difference]: With dead ends: 211 [2020-08-19 06:56:41,487 INFO L226 Difference]: Without dead ends: 154 [2020-08-19 06:56:41,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 06:56:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-19 06:56:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-08-19 06:56:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-19 06:56:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-08-19 06:56:41,501 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 125 [2020-08-19 06:56:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:41,501 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-08-19 06:56:41,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:56:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-08-19 06:56:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 06:56:41,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:41,504 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:41,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:56:41,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 66724049, now seen corresponding path program 16 times [2020-08-19 06:56:41,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:41,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222088326] [2020-08-19 06:56:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:56:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:56:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:56:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:56:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:56:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:56:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:56:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:56:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:41,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 06:56:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 264 proven. 132 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-19 06:56:42,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222088326] [2020-08-19 06:56:42,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:42,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:56:42,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339277997] [2020-08-19 06:56:42,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:56:42,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:42,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:56:42,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:56:42,016 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 26 states. [2020-08-19 06:56:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:42,588 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2020-08-19 06:56:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:56:42,588 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-08-19 06:56:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:42,590 INFO L225 Difference]: With dead ends: 215 [2020-08-19 06:56:42,590 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 06:56:42,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 06:56:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 06:56:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-08-19 06:56:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 06:56:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-08-19 06:56:42,599 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 127 [2020-08-19 06:56:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:42,599 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-08-19 06:56:42,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:56:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-08-19 06:56:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-19 06:56:42,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:42,601 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:42,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:56:42,601 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash 429354934, now seen corresponding path program 17 times [2020-08-19 06:56:42,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:42,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562087593] [2020-08-19 06:56:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 178 proven. 242 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-19 06:56:42,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562087593] [2020-08-19 06:56:42,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:42,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:56:42,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442602536] [2020-08-19 06:56:42,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:56:42,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:56:42,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:56:42,834 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 17 states. [2020-08-19 06:56:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:42,969 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-08-19 06:56:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:56:42,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-08-19 06:56:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:42,971 INFO L225 Difference]: With dead ends: 127 [2020-08-19 06:56:42,971 INFO L226 Difference]: Without dead ends: 125 [2020-08-19 06:56:42,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:56:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-19 06:56:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-08-19 06:56:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-19 06:56:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-08-19 06:56:42,980 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 129 [2020-08-19 06:56:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:42,981 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-08-19 06:56:42,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:56:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-08-19 06:56:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-19 06:56:42,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:42,983 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:42,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:56:42,983 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1971086744, now seen corresponding path program 18 times [2020-08-19 06:56:42,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:42,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060408367] [2020-08-19 06:56:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:56:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:56:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 364 proven. 156 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-19 06:56:43,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060408367] [2020-08-19 06:56:43,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:43,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 06:56:43,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146538299] [2020-08-19 06:56:43,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 06:56:43,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 06:56:43,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-08-19 06:56:43,428 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 29 states. [2020-08-19 06:56:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:43,955 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-08-19 06:56:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:56:43,955 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-08-19 06:56:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:43,956 INFO L225 Difference]: With dead ends: 243 [2020-08-19 06:56:43,957 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 06:56:43,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1212, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 06:56:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 06:56:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2020-08-19 06:56:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 06:56:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-08-19 06:56:43,966 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 145 [2020-08-19 06:56:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:43,967 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-08-19 06:56:43,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 06:56:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-08-19 06:56:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-19 06:56:43,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:43,969 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:43,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:56:43,969 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash 554411325, now seen corresponding path program 19 times [2020-08-19 06:56:43,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:43,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213995486] [2020-08-19 06:56:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:56:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:56:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:56:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:56:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:56:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:56:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:56:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:56:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-19 06:56:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-19 06:56:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-19 06:56:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-19 06:56:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-19 06:56:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 364 proven. 182 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-19 06:56:44,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213995486] [2020-08-19 06:56:44,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:44,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 06:56:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121274320] [2020-08-19 06:56:44,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 06:56:44,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 06:56:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:56:44,439 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 30 states. [2020-08-19 06:56:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:45,011 INFO L93 Difference]: Finished difference Result 247 states and 298 transitions. [2020-08-19 06:56:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 06:56:45,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-08-19 06:56:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:45,013 INFO L225 Difference]: With dead ends: 247 [2020-08-19 06:56:45,013 INFO L226 Difference]: Without dead ends: 184 [2020-08-19 06:56:45,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1324, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 06:56:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-19 06:56:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2020-08-19 06:56:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-19 06:56:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-08-19 06:56:45,024 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 147 [2020-08-19 06:56:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:45,024 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-08-19 06:56:45,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 06:56:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-08-19 06:56:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-19 06:56:45,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:45,026 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:45,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:56:45,026 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash 633966498, now seen corresponding path program 20 times [2020-08-19 06:56:45,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:45,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210740142] [2020-08-19 06:56:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:56:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:56:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:56:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:56:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:56:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 236 proven. 338 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-19 06:56:45,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210740142] [2020-08-19 06:56:45,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:45,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:56:45,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434837611] [2020-08-19 06:56:45,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:56:45,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:56:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:56:45,299 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 19 states. [2020-08-19 06:56:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:45,435 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-08-19 06:56:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:56:45,435 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-08-19 06:56:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:45,437 INFO L225 Difference]: With dead ends: 143 [2020-08-19 06:56:45,437 INFO L226 Difference]: Without dead ends: 141 [2020-08-19 06:56:45,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:56:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-19 06:56:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-08-19 06:56:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:56:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-08-19 06:56:45,448 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 149 [2020-08-19 06:56:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:45,449 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-08-19 06:56:45,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:56:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-08-19 06:56:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-08-19 06:56:45,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:45,454 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:45,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:56:45,454 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash -869716604, now seen corresponding path program 21 times [2020-08-19 06:56:45,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:45,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749701540] [2020-08-19 06:56:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:56:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:56:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:56:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:56:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:56:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:56:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:56:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 480 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-19 06:56:46,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749701540] [2020-08-19 06:56:46,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:46,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 06:56:46,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227698282] [2020-08-19 06:56:46,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 06:56:46,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 06:56:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 06:56:46,108 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 33 states. [2020-08-19 06:56:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:46,850 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2020-08-19 06:56:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 06:56:46,851 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 165 [2020-08-19 06:56:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:46,854 INFO L225 Difference]: With dead ends: 275 [2020-08-19 06:56:46,854 INFO L226 Difference]: Without dead ends: 202 [2020-08-19 06:56:46,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-08-19 06:56:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-19 06:56:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 142. [2020-08-19 06:56:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-19 06:56:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-08-19 06:56:46,866 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 165 [2020-08-19 06:56:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:46,866 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-08-19 06:56:46,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 06:56:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-08-19 06:56:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-19 06:56:46,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:46,868 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:46,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:56:46,869 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -583456599, now seen corresponding path program 22 times [2020-08-19 06:56:46,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:46,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061115828] [2020-08-19 06:56:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:56:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:56:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:56:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:56:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:56:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:56:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:56:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 06:56:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-19 06:56:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-19 06:56:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-19 06:56:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-19 06:56:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-19 06:56:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 480 proven. 240 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-19 06:56:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061115828] [2020-08-19 06:56:47,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:47,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-19 06:56:47,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115588820] [2020-08-19 06:56:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-19 06:56:47,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-19 06:56:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 06:56:47,579 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 34 states. [2020-08-19 06:56:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:48,423 INFO L93 Difference]: Finished difference Result 279 states and 337 transitions. [2020-08-19 06:56:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 06:56:48,423 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-08-19 06:56:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:48,426 INFO L225 Difference]: With dead ends: 279 [2020-08-19 06:56:48,426 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 06:56:48,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=729, Invalid=1721, Unknown=0, NotChecked=0, Total=2450 [2020-08-19 06:56:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 06:56:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 144. [2020-08-19 06:56:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 06:56:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-08-19 06:56:48,445 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 167 [2020-08-19 06:56:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:48,445 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-08-19 06:56:48,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-19 06:56:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-08-19 06:56:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-19 06:56:48,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:48,448 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:48,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:56:48,448 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -365498738, now seen corresponding path program 23 times [2020-08-19 06:56:48,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:48,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640195320] [2020-08-19 06:56:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:56:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:56:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:56:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:56:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:56:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 302 proven. 450 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-19 06:56:48,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640195320] [2020-08-19 06:56:48,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:48,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:56:48,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430998548] [2020-08-19 06:56:48,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:56:48,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:48,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:56:48,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:56:48,932 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 21 states. [2020-08-19 06:56:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:49,153 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-08-19 06:56:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:56:49,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 169 [2020-08-19 06:56:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:49,156 INFO L225 Difference]: With dead ends: 159 [2020-08-19 06:56:49,156 INFO L226 Difference]: Without dead ends: 157 [2020-08-19 06:56:49,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:56:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-19 06:56:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-08-19 06:56:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 06:56:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-08-19 06:56:49,172 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 169 [2020-08-19 06:56:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:49,173 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-08-19 06:56:49,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:56:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-08-19 06:56:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-19 06:56:49,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:49,174 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:49,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:56:49,175 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash -760007568, now seen corresponding path program 24 times [2020-08-19 06:56:49,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:49,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529058034] [2020-08-19 06:56:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:56:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:56:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:56:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:56:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:56:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:56:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:56:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:56:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 612 proven. 272 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-19 06:56:49,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529058034] [2020-08-19 06:56:49,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:49,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 06:56:49,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610263454] [2020-08-19 06:56:49,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 06:56:49,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 06:56:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 06:56:49,881 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 37 states. [2020-08-19 06:56:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:50,729 INFO L93 Difference]: Finished difference Result 307 states and 369 transitions. [2020-08-19 06:56:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 06:56:50,731 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 185 [2020-08-19 06:56:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:50,733 INFO L225 Difference]: With dead ends: 307 [2020-08-19 06:56:50,733 INFO L226 Difference]: Without dead ends: 226 [2020-08-19 06:56:50,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=836, Invalid=2026, Unknown=0, NotChecked=0, Total=2862 [2020-08-19 06:56:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-19 06:56:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2020-08-19 06:56:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-08-19 06:56:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-08-19 06:56:50,743 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 185 [2020-08-19 06:56:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:50,744 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-08-19 06:56:50,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 06:56:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-08-19 06:56:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-08-19 06:56:50,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:50,745 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:50,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:56:50,745 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1861014763, now seen corresponding path program 25 times [2020-08-19 06:56:50,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:50,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606459976] [2020-08-19 06:56:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:56:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:56:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:56:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:56:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:56:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:56:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:56:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-19 06:56:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-19 06:56:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-19 06:56:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-19 06:56:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-19 06:56:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-19 06:56:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-19 06:56:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-19 06:56:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-19 06:56:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-19 06:56:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 612 proven. 306 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-19 06:56:51,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606459976] [2020-08-19 06:56:51,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:51,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 06:56:51,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610792826] [2020-08-19 06:56:51,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 06:56:51,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 06:56:51,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 06:56:51,600 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 38 states. [2020-08-19 06:56:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:52,450 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2020-08-19 06:56:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 06:56:52,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-08-19 06:56:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:52,452 INFO L225 Difference]: With dead ends: 311 [2020-08-19 06:56:52,452 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 06:56:52,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2020-08-19 06:56:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 06:56:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2020-08-19 06:56:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-19 06:56:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-08-19 06:56:52,467 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 187 [2020-08-19 06:56:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:52,468 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-08-19 06:56:52,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 06:56:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-08-19 06:56:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-19 06:56:52,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:52,470 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:52,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:56:52,471 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 927992954, now seen corresponding path program 26 times [2020-08-19 06:56:52,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:52,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235335661] [2020-08-19 06:56:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:56:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:56:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:56:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:56:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:56:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:56:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:56:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:56:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:56:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:56:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 376 proven. 578 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-19 06:56:52,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235335661] [2020-08-19 06:56:52,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:52,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:56:52,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273194766] [2020-08-19 06:56:52,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:56:52,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:56:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:56:52,850 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 23 states. [2020-08-19 06:56:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:53,043 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2020-08-19 06:56:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:56:53,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2020-08-19 06:56:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:53,045 INFO L225 Difference]: With dead ends: 175 [2020-08-19 06:56:53,046 INFO L226 Difference]: Without dead ends: 173 [2020-08-19 06:56:53,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:56:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-19 06:56:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-08-19 06:56:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-19 06:56:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2020-08-19 06:56:53,055 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 189 [2020-08-19 06:56:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:53,056 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2020-08-19 06:56:53,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:56:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2020-08-19 06:56:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-19 06:56:53,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:53,057 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:53,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 06:56:53,058 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1753938524, now seen corresponding path program 27 times [2020-08-19 06:56:53,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:53,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746051179] [2020-08-19 06:56:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:56:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:56:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:56:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:56:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:56:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:56:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:56:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:56:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:56:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:56:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:56:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:56:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:56:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:56:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:56:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:56:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-19 06:56:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-19 06:56:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 760 proven. 342 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-19 06:56:53,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746051179] [2020-08-19 06:56:53,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:53,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 06:56:53,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719854704] [2020-08-19 06:56:53,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 06:56:53,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:53,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 06:56:53,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 06:56:53,920 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand 41 states. [2020-08-19 06:56:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:54,825 INFO L93 Difference]: Finished difference Result 339 states and 408 transitions. [2020-08-19 06:56:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-19 06:56:54,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 205 [2020-08-19 06:56:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:54,832 INFO L225 Difference]: With dead ends: 339 [2020-08-19 06:56:54,832 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:56:54,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-08-19 06:56:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:56:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 174. [2020-08-19 06:56:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 06:56:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2020-08-19 06:56:54,844 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 205 [2020-08-19 06:56:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:54,845 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2020-08-19 06:56:54,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 06:56:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2020-08-19 06:56:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-08-19 06:56:54,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:54,847 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:54,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 06:56:54,847 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1542073473, now seen corresponding path program 28 times [2020-08-19 06:56:54,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:54,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886075761] [2020-08-19 06:56:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:56:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:56:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:56:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:56:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:56:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:56:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:56:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 06:56:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-19 06:56:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-19 06:56:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-19 06:56:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-19 06:56:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-19 06:56:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-19 06:56:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-19 06:56:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-19 06:56:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-19 06:56:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-19 06:56:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 760 proven. 380 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-19 06:56:55,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886075761] [2020-08-19 06:56:55,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:55,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-19 06:56:55,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489777246] [2020-08-19 06:56:55,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-19 06:56:55,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-19 06:56:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 06:56:55,759 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand 42 states. [2020-08-19 06:56:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:56,812 INFO L93 Difference]: Finished difference Result 343 states and 415 transitions. [2020-08-19 06:56:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-19 06:56:56,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-08-19 06:56:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:56,815 INFO L225 Difference]: With dead ends: 343 [2020-08-19 06:56:56,815 INFO L226 Difference]: Without dead ends: 256 [2020-08-19 06:56:56,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1111, Invalid=2671, Unknown=0, NotChecked=0, Total=3782 [2020-08-19 06:56:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-19 06:56:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2020-08-19 06:56:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-19 06:56:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2020-08-19 06:56:56,826 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 207 [2020-08-19 06:56:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:56,827 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2020-08-19 06:56:56,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-19 06:56:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2020-08-19 06:56:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-19 06:56:56,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:56,828 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:56,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 06:56:56,829 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -196777626, now seen corresponding path program 29 times [2020-08-19 06:56:56,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:56,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498201012] [2020-08-19 06:56:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:56:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:56:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:56:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:56:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:56:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:56:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:56:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:56:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:56:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:56:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 458 proven. 722 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-19 06:56:57,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498201012] [2020-08-19 06:56:57,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:57,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:56:57,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871868590] [2020-08-19 06:56:57,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:56:57,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:56:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:56:57,248 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand 25 states. [2020-08-19 06:56:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:57,499 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2020-08-19 06:56:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:56:57,499 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 209 [2020-08-19 06:56:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:57,501 INFO L225 Difference]: With dead ends: 191 [2020-08-19 06:56:57,501 INFO L226 Difference]: Without dead ends: 189 [2020-08-19 06:56:57,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:56:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-19 06:56:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-08-19 06:56:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 06:56:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2020-08-19 06:56:57,514 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 209 [2020-08-19 06:56:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:57,515 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2020-08-19 06:56:57,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:56:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2020-08-19 06:56:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-19 06:56:57,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:57,517 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:57,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 06:56:57,517 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 65077064, now seen corresponding path program 30 times [2020-08-19 06:56:57,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:57,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809844913] [2020-08-19 06:56:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:56:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:56:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:56:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:56:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:56:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:56:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:56:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:56:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:56:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:56:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:56:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:56:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:56:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:56:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:56:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:56:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:56:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:56:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-19 06:56:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-19 06:56:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 924 proven. 420 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-19 06:56:58,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809844913] [2020-08-19 06:56:58,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:58,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-19 06:56:58,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807628322] [2020-08-19 06:56:58,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-19 06:56:58,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-19 06:56:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 06:56:58,489 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 45 states. [2020-08-19 06:56:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:59,460 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-19 06:56:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-19 06:56:59,461 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 225 [2020-08-19 06:56:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:59,463 INFO L225 Difference]: With dead ends: 371 [2020-08-19 06:56:59,463 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 06:56:59,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-08-19 06:56:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 06:56:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 190. [2020-08-19 06:56:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-19 06:56:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-08-19 06:56:59,480 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 225 [2020-08-19 06:56:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:59,481 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-08-19 06:56:59,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-19 06:56:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-08-19 06:56:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-19 06:56:59,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:59,482 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:59,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 06:56:59,483 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:59,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1137618157, now seen corresponding path program 31 times [2020-08-19 06:56:59,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:59,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296344200] [2020-08-19 06:56:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:57:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:57:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:57:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:57:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:57:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:57:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-19 06:57:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-19 06:57:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-19 06:57:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-19 06:57:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-19 06:57:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-19 06:57:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-19 06:57:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-19 06:57:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-19 06:57:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-19 06:57:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-19 06:57:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-19 06:57:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-19 06:57:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-19 06:57:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-08-19 06:57:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 924 proven. 462 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-19 06:57:00,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296344200] [2020-08-19 06:57:00,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:00,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-19 06:57:00,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434584074] [2020-08-19 06:57:00,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-19 06:57:00,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-19 06:57:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 06:57:00,508 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 46 states. [2020-08-19 06:57:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:01,693 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2020-08-19 06:57:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-19 06:57:01,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 227 [2020-08-19 06:57:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:01,697 INFO L225 Difference]: With dead ends: 375 [2020-08-19 06:57:01,697 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 06:57:01,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1332, Invalid=3224, Unknown=0, NotChecked=0, Total=4556 [2020-08-19 06:57:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 06:57:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 192. [2020-08-19 06:57:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 06:57:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 205 transitions. [2020-08-19 06:57:01,709 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 205 transitions. Word has length 227 [2020-08-19 06:57:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:01,709 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 205 transitions. [2020-08-19 06:57:01,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-19 06:57:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 205 transitions. [2020-08-19 06:57:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-19 06:57:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:01,711 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:01,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 06:57:01,712 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1057457490, now seen corresponding path program 32 times [2020-08-19 06:57:01,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:01,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932731145] [2020-08-19 06:57:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:57:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:57:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:57:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:57:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:57:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:57:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:57:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:57:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:57:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:57:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:57:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:57:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:57:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:57:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:57:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:57:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-19 06:57:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-19 06:57:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-19 06:57:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-19 06:57:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-19 06:57:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 548 proven. 882 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-19 06:57:02,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932731145] [2020-08-19 06:57:02,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:02,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:57:02,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137977091] [2020-08-19 06:57:02,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:57:02,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:57:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:57:02,226 INFO L87 Difference]: Start difference. First operand 192 states and 205 transitions. Second operand 27 states. [2020-08-19 06:57:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:02,505 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-08-19 06:57:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:57:02,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 229 [2020-08-19 06:57:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:02,507 INFO L225 Difference]: With dead ends: 207 [2020-08-19 06:57:02,507 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 06:57:02,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:57:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 06:57:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-08-19 06:57:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 06:57:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2020-08-19 06:57:02,521 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 229 [2020-08-19 06:57:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:02,521 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2020-08-19 06:57:02,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:57:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2020-08-19 06:57:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-19 06:57:02,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:02,523 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:02,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 06:57:02,523 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash -777665740, now seen corresponding path program 33 times [2020-08-19 06:57:02,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:02,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615344992] [2020-08-19 06:57:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:57:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:57:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:57:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:57:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:57:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:57:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:57:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:57:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:57:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:57:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:57:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:57:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:57:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:57:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:57:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:57:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-19 06:57:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-19 06:57:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-19 06:57:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-19 06:57:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-19 06:57:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-19 06:57:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-19 06:57:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 1104 proven. 506 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-19 06:57:03,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615344992] [2020-08-19 06:57:03,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:03,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-19 06:57:03,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617202324] [2020-08-19 06:57:03,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-19 06:57:03,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-19 06:57:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-08-19 06:57:03,666 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand 49 states. [2020-08-19 06:57:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:04,997 INFO L93 Difference]: Finished difference Result 403 states and 486 transitions. [2020-08-19 06:57:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-19 06:57:04,998 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 245 [2020-08-19 06:57:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:05,000 INFO L225 Difference]: With dead ends: 403 [2020-08-19 06:57:05,000 INFO L226 Difference]: Without dead ends: 298 [2020-08-19 06:57:05,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1475, Invalid=3637, Unknown=0, NotChecked=0, Total=5112 [2020-08-19 06:57:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-19 06:57:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 206. [2020-08-19 06:57:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-19 06:57:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2020-08-19 06:57:05,016 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 245 [2020-08-19 06:57:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:05,017 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2020-08-19 06:57:05,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-19 06:57:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2020-08-19 06:57:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-19 06:57:05,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:05,018 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:05,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 06:57:05,019 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1435577433, now seen corresponding path program 34 times [2020-08-19 06:57:05,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:05,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303042319] [2020-08-19 06:57:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:57:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:57:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:57:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:57:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:57:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:57:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:57:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 06:57:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-19 06:57:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-19 06:57:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-19 06:57:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-19 06:57:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-19 06:57:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-19 06:57:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-19 06:57:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-19 06:57:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-19 06:57:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-19 06:57:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-19 06:57:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-08-19 06:57:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-08-19 06:57:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:57:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-08-19 06:57:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 1104 proven. 552 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-19 06:57:06,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303042319] [2020-08-19 06:57:06,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:06,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-19 06:57:06,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931144984] [2020-08-19 06:57:06,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-19 06:57:06,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-19 06:57:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2020-08-19 06:57:06,236 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand 50 states. [2020-08-19 06:57:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:07,664 INFO L93 Difference]: Finished difference Result 407 states and 493 transitions. [2020-08-19 06:57:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-19 06:57:07,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 247 [2020-08-19 06:57:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:07,666 INFO L225 Difference]: With dead ends: 407 [2020-08-19 06:57:07,666 INFO L226 Difference]: Without dead ends: 304 [2020-08-19 06:57:07,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1573, Invalid=3829, Unknown=0, NotChecked=0, Total=5402 [2020-08-19 06:57:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-19 06:57:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 208. [2020-08-19 06:57:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-19 06:57:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2020-08-19 06:57:07,678 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 247 [2020-08-19 06:57:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:07,679 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2020-08-19 06:57:07,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-19 06:57:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2020-08-19 06:57:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-19 06:57:07,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:07,681 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:07,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 06:57:07,681 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1941512130, now seen corresponding path program 35 times [2020-08-19 06:57:07,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:07,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650869231] [2020-08-19 06:57:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:57:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:57:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:57:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:57:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:57:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:57:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:57:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:57:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:57:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:57:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:57:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:57:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:57:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:57:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:57:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:57:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:57:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:57:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-19 06:57:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-19 06:57:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-19 06:57:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 06:57:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-19 06:57:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 646 proven. 1058 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-19 06:57:08,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650869231] [2020-08-19 06:57:08,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:08,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 06:57:08,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000765870] [2020-08-19 06:57:08,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 06:57:08,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:08,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 06:57:08,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-19 06:57:08,283 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand 29 states. [2020-08-19 06:57:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:08,522 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2020-08-19 06:57:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 06:57:08,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 249 [2020-08-19 06:57:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:08,525 INFO L225 Difference]: With dead ends: 223 [2020-08-19 06:57:08,525 INFO L226 Difference]: Without dead ends: 221 [2020-08-19 06:57:08,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:57:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-19 06:57:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-08-19 06:57:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-08-19 06:57:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2020-08-19 06:57:08,537 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 249 [2020-08-19 06:57:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:08,537 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2020-08-19 06:57:08,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 06:57:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2020-08-19 06:57:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-19 06:57:08,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:08,539 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:08,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 06:57:08,539 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:08,540 INFO L82 PathProgramCache]: Analyzing trace with hash -712391136, now seen corresponding path program 36 times [2020-08-19 06:57:08,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:08,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744000619] [2020-08-19 06:57:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:57:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:57:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:57:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:57:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:57:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:57:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:57:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:57:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:57:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:57:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:57:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:57:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:57:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:57:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:57:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:57:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:57:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:57:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-19 06:57:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-19 06:57:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-19 06:57:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 06:57:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-19 06:57:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-19 06:57:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-19 06:57:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 1300 proven. 600 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-19 06:57:09,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744000619] [2020-08-19 06:57:09,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:09,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-19 06:57:09,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307616299] [2020-08-19 06:57:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-19 06:57:09,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-19 06:57:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-08-19 06:57:09,861 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand 53 states. [2020-08-19 06:57:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:11,386 INFO L93 Difference]: Finished difference Result 435 states and 525 transitions. [2020-08-19 06:57:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-19 06:57:11,386 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 265 [2020-08-19 06:57:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:11,388 INFO L225 Difference]: With dead ends: 435 [2020-08-19 06:57:11,388 INFO L226 Difference]: Without dead ends: 322 [2020-08-19 06:57:11,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-08-19 06:57:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-19 06:57:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 222. [2020-08-19 06:57:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-19 06:57:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2020-08-19 06:57:11,401 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 265 [2020-08-19 06:57:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:11,401 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2020-08-19 06:57:11,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-19 06:57:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2020-08-19 06:57:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-08-19 06:57:11,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:11,403 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:11,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 06:57:11,403 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -993908027, now seen corresponding path program 37 times [2020-08-19 06:57:11,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:11,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234178176] [2020-08-19 06:57:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:57:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:57:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:57:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:57:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:57:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-19 06:57:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-19 06:57:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-19 06:57:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-19 06:57:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-19 06:57:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-19 06:57:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-19 06:57:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-19 06:57:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-19 06:57:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-19 06:57:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-19 06:57:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-19 06:57:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-19 06:57:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-19 06:57:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-08-19 06:57:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-19 06:57:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-08-19 06:57:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-08-19 06:57:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-19 06:57:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-08-19 06:57:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1300 proven. 650 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-19 06:57:12,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234178176] [2020-08-19 06:57:12,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:12,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-19 06:57:12,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198768756] [2020-08-19 06:57:12,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-19 06:57:12,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-19 06:57:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2020-08-19 06:57:12,735 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand 54 states. [2020-08-19 06:57:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:14,348 INFO L93 Difference]: Finished difference Result 439 states and 532 transitions. [2020-08-19 06:57:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-19 06:57:14,349 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2020-08-19 06:57:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:14,351 INFO L225 Difference]: With dead ends: 439 [2020-08-19 06:57:14,351 INFO L226 Difference]: Without dead ends: 328 [2020-08-19 06:57:14,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1834, Invalid=4486, Unknown=0, NotChecked=0, Total=6320 [2020-08-19 06:57:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-19 06:57:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 224. [2020-08-19 06:57:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-19 06:57:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2020-08-19 06:57:14,365 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 267 [2020-08-19 06:57:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:14,366 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2020-08-19 06:57:14,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-19 06:57:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2020-08-19 06:57:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-19 06:57:14,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:14,368 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:14,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 06:57:14,369 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -948700630, now seen corresponding path program 38 times [2020-08-19 06:57:14,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:14,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122650342] [2020-08-19 06:57:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:57:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:57:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:57:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:57:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:57:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:57:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:57:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:57:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:57:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:57:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:57:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:57:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:57:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:57:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:57:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-19 06:57:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-19 06:57:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-19 06:57:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-19 06:57:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-19 06:57:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-19 06:57:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-19 06:57:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-08-19 06:57:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-08-19 06:57:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:14,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-19 06:57:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 752 proven. 1250 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-19 06:57:15,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122650342] [2020-08-19 06:57:15,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:15,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 06:57:15,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482016634] [2020-08-19 06:57:15,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 06:57:15,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 06:57:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-19 06:57:15,005 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand 31 states. [2020-08-19 06:57:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:15,294 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-08-19 06:57:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 06:57:15,295 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 269 [2020-08-19 06:57:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:15,297 INFO L225 Difference]: With dead ends: 239 [2020-08-19 06:57:15,297 INFO L226 Difference]: Without dead ends: 237 [2020-08-19 06:57:15,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-08-19 06:57:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-19 06:57:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-08-19 06:57:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-19 06:57:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 252 transitions. [2020-08-19 06:57:15,309 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 252 transitions. Word has length 269 [2020-08-19 06:57:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:15,309 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 252 transitions. [2020-08-19 06:57:15,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 06:57:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 252 transitions. [2020-08-19 06:57:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-08-19 06:57:15,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:15,311 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:15,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 06:57:15,312 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash 167610380, now seen corresponding path program 39 times [2020-08-19 06:57:15,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:15,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372728847] [2020-08-19 06:57:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:57:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:57:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:57:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:57:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:57:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:57:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 06:57:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-19 06:57:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-19 06:57:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-19 06:57:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-19 06:57:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-19 06:57:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 06:57:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-19 06:57:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-19 06:57:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-19 06:57:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-19 06:57:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-19 06:57:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-19 06:57:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-19 06:57:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-19 06:57:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-19 06:57:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-08-19 06:57:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-08-19 06:57:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-19 06:57:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-19 06:57:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2020-08-19 06:57:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 1512 proven. 702 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-19 06:57:16,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372728847] [2020-08-19 06:57:16,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:16,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-19 06:57:16,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698909567] [2020-08-19 06:57:16,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-19 06:57:16,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-19 06:57:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-08-19 06:57:16,912 INFO L87 Difference]: Start difference. First operand 236 states and 252 transitions. Second operand 57 states. [2020-08-19 06:57:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:18,643 INFO L93 Difference]: Finished difference Result 467 states and 564 transitions. [2020-08-19 06:57:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-19 06:57:18,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 285 [2020-08-19 06:57:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:18,649 INFO L225 Difference]: With dead ends: 467 [2020-08-19 06:57:18,649 INFO L226 Difference]: Without dead ends: 346 [2020-08-19 06:57:18,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2001, Invalid=4971, Unknown=0, NotChecked=0, Total=6972 [2020-08-19 06:57:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-19 06:57:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2020-08-19 06:57:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-08-19 06:57:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 254 transitions. [2020-08-19 06:57:18,668 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 254 transitions. Word has length 285 [2020-08-19 06:57:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:18,669 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 254 transitions. [2020-08-19 06:57:18,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-19 06:57:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 254 transitions. [2020-08-19 06:57:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-08-19 06:57:18,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:18,674 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:18,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 06:57:18,675 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 196225073, now seen corresponding path program 40 times [2020-08-19 06:57:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:18,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960162594] [2020-08-19 06:57:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:57:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:57:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:57:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:57:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:57:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:57:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-19 06:57:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-19 06:57:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-19 06:57:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-19 06:57:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-19 06:57:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-19 06:57:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-19 06:57:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-19 06:57:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-19 06:57:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-19 06:57:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-19 06:57:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-19 06:57:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-08-19 06:57:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-08-19 06:57:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:57:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-08-19 06:57:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2020-08-19 06:57:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-19 06:57:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2020-08-19 06:57:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2020-08-19 06:57:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-08-19 06:57:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 1512 proven. 756 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-19 06:57:20,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960162594] [2020-08-19 06:57:20,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:20,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-19 06:57:20,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504482915] [2020-08-19 06:57:20,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-19 06:57:20,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-19 06:57:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2020-08-19 06:57:20,296 INFO L87 Difference]: Start difference. First operand 238 states and 254 transitions. Second operand 58 states. [2020-08-19 06:57:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:22,302 INFO L93 Difference]: Finished difference Result 471 states and 571 transitions. [2020-08-19 06:57:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-19 06:57:22,302 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 287 [2020-08-19 06:57:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:22,305 INFO L225 Difference]: With dead ends: 471 [2020-08-19 06:57:22,305 INFO L226 Difference]: Without dead ends: 352 [2020-08-19 06:57:22,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2115, Invalid=5195, Unknown=0, NotChecked=0, Total=7310 [2020-08-19 06:57:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-08-19 06:57:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2020-08-19 06:57:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-19 06:57:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 256 transitions. [2020-08-19 06:57:22,318 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 256 transitions. Word has length 287 [2020-08-19 06:57:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:22,319 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 256 transitions. [2020-08-19 06:57:22,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-19 06:57:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 256 transitions. [2020-08-19 06:57:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-08-19 06:57:22,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:22,321 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:22,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 06:57:22,321 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1925141270, now seen corresponding path program 41 times [2020-08-19 06:57:22,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:22,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977702617] [2020-08-19 06:57:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:57:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:57:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:57:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:57:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:57:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:57:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:57:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:57:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:57:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:57:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:57:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:57:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:57:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:57:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:57:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:57:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:57:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-19 06:57:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-19 06:57:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-19 06:57:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 06:57:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-19 06:57:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-19 06:57:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-19 06:57:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2020-08-19 06:57:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-08-19 06:57:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:22,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-08-19 06:57:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 866 proven. 1458 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-19 06:57:23,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977702617] [2020-08-19 06:57:23,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:23,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 06:57:23,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825835025] [2020-08-19 06:57:23,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 06:57:23,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 06:57:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 06:57:23,035 INFO L87 Difference]: Start difference. First operand 240 states and 256 transitions. Second operand 33 states. [2020-08-19 06:57:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:23,356 INFO L93 Difference]: Finished difference Result 255 states and 272 transitions. [2020-08-19 06:57:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 06:57:23,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 289 [2020-08-19 06:57:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:23,359 INFO L225 Difference]: With dead ends: 255 [2020-08-19 06:57:23,359 INFO L226 Difference]: Without dead ends: 253 [2020-08-19 06:57:23,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 06:57:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-19 06:57:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-08-19 06:57:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-19 06:57:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 269 transitions. [2020-08-19 06:57:23,372 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 269 transitions. Word has length 289 [2020-08-19 06:57:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:23,372 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 269 transitions. [2020-08-19 06:57:23,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 06:57:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 269 transitions. [2020-08-19 06:57:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-08-19 06:57:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:23,375 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:23,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 06:57:23,375 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:23,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:23,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2144237320, now seen corresponding path program 42 times [2020-08-19 06:57:23,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:23,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139601291] [2020-08-19 06:57:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:57:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:57:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:57:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:57:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:57:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-19 06:57:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 06:57:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 06:57:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-19 06:57:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-19 06:57:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-19 06:57:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-19 06:57:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-19 06:57:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-19 06:57:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-19 06:57:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-19 06:57:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-19 06:57:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-19 06:57:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-19 06:57:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-19 06:57:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 06:57:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-19 06:57:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-19 06:57:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-19 06:57:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2020-08-19 06:57:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-08-19 06:57:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-08-19 06:57:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2020-08-19 06:57:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-19 06:57:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 1740 proven. 812 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-08-19 06:57:25,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139601291] [2020-08-19 06:57:25,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:25,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-19 06:57:25,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697513608] [2020-08-19 06:57:25,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-19 06:57:25,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-19 06:57:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2020-08-19 06:57:25,171 INFO L87 Difference]: Start difference. First operand 252 states and 269 transitions. Second operand 61 states. [2020-08-19 06:57:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:27,186 INFO L93 Difference]: Finished difference Result 499 states and 603 transitions. [2020-08-19 06:57:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-19 06:57:27,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 305 [2020-08-19 06:57:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:27,189 INFO L225 Difference]: With dead ends: 499 [2020-08-19 06:57:27,189 INFO L226 Difference]: Without dead ends: 370 [2020-08-19 06:57:27,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2294, Invalid=5716, Unknown=0, NotChecked=0, Total=8010 [2020-08-19 06:57:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-08-19 06:57:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 254. [2020-08-19 06:57:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-08-19 06:57:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 271 transitions. [2020-08-19 06:57:27,203 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 271 transitions. Word has length 305 [2020-08-19 06:57:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:27,204 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 271 transitions. [2020-08-19 06:57:27,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-19 06:57:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 271 transitions. [2020-08-19 06:57:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-08-19 06:57:27,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:27,206 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:27,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 06:57:27,206 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash 191997085, now seen corresponding path program 43 times [2020-08-19 06:57:27,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:27,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27800656] [2020-08-19 06:57:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY